When there is no net torque acting on the body, it is considered to be in rotational equilibrium. In this case, the angular velocity of the body is constant.
Therefore, torque is equal to zero. In other words, torque is zero when the axis of rotation is crossed by the force.
In physics and mechanics, torque is the spinning equivalent of force. Another name for it is the moment of force. It serves as an example of how a force can alter a body's rotational motion.
For instance, no rotation will occur if a force is applied to the door's line. On the other hand, applying a force of a specific size at a right angle to the door's outside edge is the most effective technique to make it rotate. It does so because it rotates as a result of the torque this force produces.
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UNIT 2 Dynamics | 2.J Modified Atwood Machines NAME DATE X20XE Scenario in the diagram shown to the right a block of mass M has taken a quick hit from a bat. After the strike, its front end is at position x = 0 at time t = 0 and it is moving to the right with initial speed vo. The block slides on a rough surface and is also connected to a hanging mass object of mass m by a string that passes over an ideal pulley. The front end of the block reaches position x = D at time t=ti, the instant that the block comes to rest. The block then returns to position x = 0 at time t = 12, having a leftward speed v2 at that time. Using Representations The dots below represent the block on the table during the interval 0
The force of friction points to the right, while the force of tension points to the left, resulting in a decrease in the net force (horizontally) and a corresponding decrease in acceleration.
acceleration: the rate at which the speed and direction of a moving object vary over time. A point or object going straight ahead is accelerated when it accelerates or decelerates. Even if the speed is constant, motion on a circle accelerates because the direction is always shifting.
For instance, if a car is traveling at a constant speed and turning a corner, it is accelerating since its direction is shifting. The acceleration increases with turning speed. Therefore, when velocity varies, whether in magnitude (an increase or reduction in speed), direction, or both, there is an acceleration.
Is the magnitude of the block's acceleration greater before the block reaches x = D or after? Explain your reasoning in terms of the forces that you drew in the above diagrams.
B) Since both the friction force and the tension force are pointed to the left between time t = 0 and t = t, the block accelerates further before it reaches x = D. Following t = t, the force of friction points to the right, while the force of tension points to the left, resulting in a decrease in the net force (horizontally) and a corresponding decrease in acceleration.
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Complete Question -
you measured the mass of three different volumes of water. what was the total mass of the graduated cylinder and the water for the three measurements? choose the masses that are closest to the observed values.
The total mass of the graduated cylinder and the water for the three measurements would be 120g.
What is mass?Mass is the physical property of a body which determines its resistance to acceleration when a net force is applied. It is measured in kilograms (kg) or pounds (lbs) and is proportional to the amount of matter the body contains. Mass is an intrinsic property of matter, meaning it cannot be altered by changing the shape, size or temperature of a body. Mass is often confused with weight, which is the measure of the gravitational force on an object, and should not be used interchangeably.
The total mass of the graduated cylinder and the water for the three measurements would depend on the individual masses of each measurement. For example, if the measurements were 10mL, 20mL, and 30mL of water respectively, the total mass of the graduated cylinder and the water would be the sum of the individual masses. Assuming the density of the water is 1g/mL, the total mass of the graduated cylinder and the water for the three measurements would be 40g. If the measurements were 20mL, 40mL, and 60mL of water respectively, the total mass of the graduated cylinder and the water for the three measurements would be 120g.
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at what distance is an object, to the nearest km, if its parallax angle is 0.45 degrees as measured from a baseline of 2000 km?
The distance to the object is approximately 127,907.8 km to the nearest km.
The formula to calculate the distance to an object using its parallax angle is:
distance = (baseline) / (2 * tan(parallax angle))
In this case, the baseline is 2000 km and the parallax angle is 0.45 degrees. To convert the angle to radians, we multiply by pi/180:
distance = (2000 km) / (2 * tan(0.45 * pi/180))
distance = (2000 km) / (2 * tan(0.007854))
distance = (2000 km) / (2 * 0.007854)
distance = (2000 km) / (0.01571)
distance = 127907.8 km
Therefore, the distance to the object is approximately 127,907.8 km to the nearest km
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Schools can ensure certain rights, accommodations and supportive measures only for victims who report the incident to law enforcement.
The given statement is false. Schools should ensure rights, accomodation and supportive measures for all the victims whether they have reported the incident or not.
Colleges are required to safeguard the rights of sexual assault victims and make specific concessions. Campus SaVE mandates that establishments offer survivors fair accommodations and safety precautions whether or not they choose to contact law police. Sexual assault and harassment are vices that frequently occur in educational settings. Every school needs to have a process or department in place to handle complaints from those who have been the victims of sexual offenses.
All of a school's activities or programs for teaching fall under this category. This means that regardless of whether the programs are held on school property or elsewhere, Title IX safeguards students in connection with all academic, instructional, extracurricular, sports, and other activities.
In response to the query, schools are required to guarantee specific rights, accommodations, and protective measures for sexual assault victims—and not just in cases when they decide to notify law enforcement.
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The complete question is
Schools must ensure certain rights, accommodations
and protective measures for sexual assault victims
only if they choose to report to law enforcement.
True
False
for a jack with a mechanical advantage of 2.9, how much displacement is required to raise a truck 17 cm
A displacement of 5.9 cm is required to raise a truck 17 cm using a jack with a mechanical advantage of 2.9.
Mechanical advantage is a measure of how efficiently a machine or device can multiply or amplify the force applied to it. It is defined as the ratio of the load being lifted or moved to the effort required to lift or move it.
A machine with a high mechanical advantage can lift or move heavy loads with relatively little effort, while a machine with a low mechanical advantage requires a much larger effort to lift or move the same load.
The mechanical advantage of a jack is the ratio of the load being lifted to the effort required to lift it. If a jack has a mechanical advantage of 2.9, it means that for every 2.9 units of effort applied, 1 unit of the load is lifted.
To find the displacement required to raise a truck 17 cm, we can use the formula:
Displacement = Load / Mechanical Advantage = 17 cm / 2.9 = 5.9 cm
So, a displacement of 5.9 cm is required to raise a truck 17 cm using a jack with a mechanical advantage of 2.9. This displacement would be the movement of the jack's handle or lever and represents the amount of effort required to lift the load.
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the thermometer records 680mmHg at ice point .The temperature it records at 380mmHg is what
The temperature it records at 380 mmHg is -25° C
It is given that
Pressure at steam point = 680 mmHg
Pressure at ice point = 440 mmHg
Temperature is a physical quantity that expresses quantitatively the perceptions of hotness and coldness. Temperature is measured with a thermometer. Thermometers are calibrated in various temperature scales that historically have relied on various reference points and thermometric substances for definition
440 - 380/680 - 380 = 0 - x/100 - x
x = -25° C
Hence, temperature it records at 380 mmHg is -25° C
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The temperature it records at 380 mmHg is -25° C
What is Temperature?A physical quantity known as temperature expresses the concepts of hotness and coldness in numerical form. With a thermometer, temperature is measured. Thermometers are calibrated in a variety of temperature scales that historically rely on different reference points and thermometric materials for defin
It is given that
Pressure at steam point = 680 mmHg
Pressure at ice point = 440 mmHg
440 - 380/680 - 380 = 0 - x/100 - x
x = -25° C
Hence, temperature it records at 380 mmHg is -25° C
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a 2.0 kg ball is thrown at 2 m/s strikes a 20.0 kg person sitting at rest on a bench. the ball gets stuck in the person's hair. what is the velocity of the person and the ball?
Answer:
0.18 m/s
Explanation:
Conservation of Momentum Law: total P before the collision must equal total momentum after the collision. P = mv
(2.0 kg)(2 m/s) + (20.0 kg)(0 m/s) = (2.0 kg + 20 kg)v
before after
4 kg·m/s = (22.0 kg)v
v = (4 kg·m/s) / (22.0 kg) = 0.18 m/s
the earth completes a circular orbit around the sun in one year. the orbit has a radius of 93,000,000 miles. what is the speed of the earth around the sun in m/s? Report your result using scientific notation.
Answer:
29,800.85 m/s or 2.98 x 10^4
Explanation:
1 mile is 1609.34 Meters
1 year is 31,536,000 seconds
1609.34 x 93,000,000 = radius in meters= 149,668,620,000
2 x pi x r = circumference and or distance traveled
2 x pi x 149,668,620,000
distance traveled / time it takes to travel the distance = speed or velocity
940,395,674,129.84 / 31,556,000 = 29,800.85 m/s or 2.98 x 10^4
Is acceleration zero when velocity is zero?
No, acceleration is not necessarily zero when velocity is zero. Acceleration is a measure of how quickly an object's velocity is changing.
An object can have zero velocity, but still be acceleration. This can happen when an object is in a state of balanced forces, meaning that the net force acting on the object is zero, but the forces are not at the same magnitude and opposite direction. For example, if an object is at rest, its velocity is zero, but if a force is applied to it, the object will start to move and its velocity will increase, thus the object is accelerating. In this case, even though the velocity is zero, the object is still accelerating because the velocity is changing with time due to the applied force. On the other hand, when an object is in a state of equilibrium, meaning that the net force acting on the object is zero and the forces are at the same magnitude and opposite direction. The object is not accelerating but it can have non-zero velocity. In summary, acceleration and velocity are different physical quantities. An object can have zero velocity but still be accelerating, or an object can have non-zero velocity but still be in a state of equilibrium.
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017 (part 2 of 2) 10.0 points
Leaving the distance between the 313 kg and
the 536 kg masses fixed, at what distance from
the 536 kg mass (other than infinitely remote
ones) does the 39.3 kg mass experience a net
force of zero?
Answer in units of m.
The distance of 39.3 kg mass from 536 kg mass will be .0567d to have zero force of attraction.
What is Gravitational Force ?The force of attraction between any two bodies is inversely proportional to the square of the distance between them and directly proportional to the product of their masses.
If the cannon is fired after being filled with gunpowder, the following situations could occur.
The gun will fall to Earth in a projectile motion if its speed is low.The cannonball will continue to circle the Earth in a constant orbit if, at that precise height, its speed is equal to the orbital speed.The cannonball maintains an elliptical orbit around the Earth if its speed is more than the orbital velocity but insufficient to escape from it, that is, lower than the Earth's escape velocity.The projectile departs the Earth on a parabolic or hyperbolic trajectory if the speed is equal to escape velocity or greater.The masses are
m₁ = 313 kg
m₂ = 536 kg
m = 39.3 kg
So as per sum if the distance between m₁ and m₂ is d and distance between m and m₂ is s then
The gravitational force between m₁ and m is equal to gravitational force between m and m₂.
[tex]\frac{G*m\x_{1} *m }{(d-s)\x^{2} } =\frac{G*m\x_{2} *m }{s\x^{2} }[/tex]
⇒ m₁* s² = m₂ * (d-s)²
⇒313s² = 536d² - 1072ds + 536s²
⇒223s² + 536d² - 1072ds = 0
⇒ s = 0.567d
The distance of 39.3 kg mass from 536 kg mass will be .0567d to have zero force of attraction.
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Discovering outer space had been an ancient goal of humanity. The first rocket launched ever was by the
American college professor and scientist Robert Goddard who built and flew the world's first liquid propellant
rocket on March 16, 1926. Its flight, though unimpressive (it climbed only 12.5 meters), was the forerunner of
the Saturn V Moon rocket 43 years later. Answer the following question using your math and science skills.
While launching a rocket into space, the rocket thrust (force) is calculated to be 20,000 N.
OOD
a) The mass of the rocket is approximately 3,000 kg, what would be the acceleration of the launched rocket?
b) The rocket starts from rest, what would be the final speed after 5 min?
The earliest known observations of the night sky date back to ancient civilizations such as the Babylonians, Egyptians, and Chinese, who recorded the positions of stars, planets, and other celestial bodies.
Explain about goal of humanity:Discovering outer space has been a goal of humanity for centuries. Throughout history, people have looked to the stars with a sense of wonder and curiosity, trying to understand the nature of the universe. a) To calculate the acceleration of the launched rocket, you can use the formula:However, it wasn't until the 20th century that humans were able to physically explore space. With the development of rocket technology, scientists were able to launch spacecrafts beyond Earth's atmosphere, allowing for the study of celestial bodies and the exploration of the Solar System and beyond.a = F / m
where F is the force (thrust) acting on the rocket and m is the mass of the rocket.
In this case, F = 20,000 N and m = 3,000 kg
So, a = 20,000 N / 3,000 kg = 6.67 m/s²
b) To calculate the final speed of the rocket after 5 minutes, you can use the formula:
v = a * t
where v is the final speed, a is the acceleration and t is the time.
In this case, a = 6.67 m/s² and t = 5 minutes = 300 seconds.
So, v = 6.67 m/s² * 300 seconds = 2,001 m/s
It's worth noting that the acceleration and final speed calculations are assuming that the rocket thrust is constant during the entire flight, which is not the case in reality, thrust changes during different stages of the rocket's flight.To learn more about goal of humanity refer to:
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Note: Take East as the positive direction. A(n) 89 kg fisherman jumps from a dock into a 135 kg rowboat at rest on the West side of the dock. If the velocity of the fisherman is 5.2 m/s to the West as he leaves the dock, what is the final velocity of the fisherman and the boat? Answer in units of m/s. Answer in units of m/s.
The final velocity of the fisherman and the boat is 2.06 m/sec.
What is meant by velocity?The directional speed of an item in motion, as measured by a specific unit of time and viewed from a certain point of reference, is what is referred to as velocity.The displacement that an object or particle experiences with respect to time is expressed vectorially as velocity. The metre per second (m/s) is the accepted unit of velocity magnitude (also known as speed).The vector quantity velocity (v), denoted by the equation v = s/t, quantifies displacement (or change in position, s), over change in time (t).Velocity is the pace and direction of an item's movement, whereas speed is the time rate at which an object is travelling along a route. In other words, velocity is a vector, whereas speed is a scalar number.
Given data :
We have given mass of the fisherman [tex]m_{1}[/tex] = 89 kg
Velocity of fisherman v = - 5.2 m/sec ( As east direction is positive direction )
Mass of the rowboat [tex]m_{2}[/tex] = 135 kg
As the rowboat is at rest so [tex]v_{2}[/tex] = 0 m/sec
Now according to conservation of momentum
[tex]m_{1}[/tex] [tex]v_{1}[/tex] + [tex]m_{2}[/tex][tex]v_{2}[/tex] = ( [tex]m_{1}[/tex] + [tex]m_{2}[/tex] ) v
89 x 5.2 + 135 x 0 = ( 89 + 135 ) x v
462.8 + 0 = 224 x v
v = 462.8/ 224 = 2.06 m/sec
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a ball is thrown from ground level with an initial velocity of 100m/s at an angle of 30 how far will the ball travel horizontally
The ball will travel horizontally for 883.7 m. The result is obtained by using the formula for the range of projectile motion.
What is the range of projectile motion?The range of projectile motion is the maximum distance covered on x-axis. It can be calculated by
R = (v₀² sin 2θ)/g
Where
R = range (maximum distance on x-axis)v₀ = initial velocityθ = angleg = acceleration due to gravityA ball is thrown from ground level.
The initial velocity, v₀ = 100 m/sAngle, θ = 30°Find the horizontal maximum distance!
We use g = 9.8 m/s².
Using the formula above, we get
R = (v₀² sin 2θ)/g
R = (100² × sin 2(30°))/9.8
R = (10000 × sin 60°)/9.8
R = (10000 (½√3))/9.8
R = (10000 (½√3))/9.8
R = 883.7 m
Hence, the horizontal maximum distance of the projectile motion is 883.7 m.
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Please help on all the questions I will post 50 points each
Answer:
The answer is -320 J.
Answer:
-320 J.
Explanation:
HELP ME ASPP PLEASE THANK YOU
Correct option is B, The given equation is Balanced.
An element is balanced if it has the same amount of atoms on both sides of the equation. The equation is balanced if all the components are in balance.
A chemical equation is imbalanced and unable to accurately explain what transpires during a reaction if the numbers of each type of atom on the two sides are different. The equation must first be balanced in order to continue.
Equal numbers of atoms from various elements are present in both the reactants and the products in balanced chemical equations. Varied elements' atom counts in the reactants and products of unbalanced chemical equations are different.
The number of atoms of Nb element on both sides = 4
The number of atoms of oxygen on both sides = 10
∴ The given equation is Balanced equation.
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What is the formula for clockwise torque?
The formula for clockwise torque is nothing but a torque that rotates an object in clockwise direction which is a negative torque.
Torque is a measure of the turning effect of an applied force about a specific point or axis. It is calculated by multiplying the force applied to an object by the distance from the point of rotation to the point where the force is applied.
The greater the force or the longer the distance from the point of rotation, the greater the torque. The unit of torque is typically Newton-meters (N·m) in the International System of Units (SI) or pound-feet (lb·ft) in the imperial system. Torque is essential in various fields such as physics, mechanics, engineering and robotics.
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Which statement best characterizes the concept of brainstorming?
It encourages the use of the best medical evidence.
O It provides a list of the best tests and treatments.
O It's an idea-generation technique that can only be used in groups.
O It encourages the generation of a wide variety of solutions to try.
The phrase that sums up brainstorming concepts the best is It's a method for coming up with ideas that is only applied in groups.
What is the idea behind brainstorming?The Department of Energy is delivering a clean energy future that creates good-paying, union jobs for communities in every pocket of the United States.l ideas and solutions. This method calls for a lengthy, rambunctious conversation in which each group member is urged should think aloud and offer as many suggestions as they can based on their varied knowledge.
Which of the below is crucial when brainstorming?First, brainstorming should prioritize quantity over quality. Yes, you read correctly: quantity rather than quality. The investigation phase of a development task begins with brainstorming, therefore it's critical to somehow be open to all possibilities and options.
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The phrase that sums up brainstorming concepts the best is It's a method for coming up with ideas that is only applied in groups.
What is the idea behind brainstorming?The Department of Energy is delivering a clean energy future that creates good-paying, union jobs for communities in every pocket of the United States.l ideas and solutions. This method calls for a lengthy, rambunctious conversation in which each group member is urged should think aloud and offer as many suggestions as they can based on their varied knowledge.
Which of the below is crucial when brainstorming?First, brainstorming should prioritize quantity over quality. Yes, you read correctly: quantity rather than quality. The investigation phase of a development task begins with brainstorming, therefore it's critical to somehow be open to all possibilities and options.
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A flask containing 125 mL of hexanes is boiled at about 342 K. What happens during this process? The boiling point of hexanes is 68.73 °C. A. All IMFs break and the solvent vaporizes. B. IMFs are formed and the solvent condenses. C. MFs are formed and the solvent vaporizes. D. All IMFs break and the solvent condenses.
During the process all IMFs break and the solvent vaporizes.
During the boiling process, the solvent (hexanes) reaches its boiling point (68.73 °C) and vaporizes, meaning it changes from a liquid to a gas. The boiling point of a liquid is the temperature at which its vapor pressure is equal to the atmospheric pressure. The solvent molecules need to gain enough energy to overcome the intermolecular forces (IMFs) between them to change phase from liquid to gas. The process of vaporization requires an input of energy, which is supplied by heat. The heat energy provided causes the solvent molecules to absorb enough energy to overcome the IMFs, and the solvent vaporizes.
IMFs are the forces that hold the molecules of a substance together, and these forces are weaker in gases than in liquids. When the solvent vaporizes, the IMFs between the solvent molecules are broken, and the solvent molecules move freely in the gaseous state. So, in this case, during the boiling process, all IMFs break and the solvent vaporizes.
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PLs help me dont steal point plssssssss :(
The graph shows the acceleration of a 5 kg object over time
What is the net force acting on the object
The mass of the object increases from 5 kg to 6kg and the net force on the object remains the same what will happen to the acceleration of the object will it decrease increase or stay the same
Explain reasoning
The acceleration of the object will decrease if the mass increases from 5kg to 6kg with a constant force.
What is second law of motion?Newton's second law of motion states that the acceleration of an object equals the net force acting on the object divided by the object’s mass.
This means that the mass and acceleration of an object are inversely related i.e. the greater the mass of an object, the less it will accelerate when a given force is applied.
For example, doubling the mass of an object results in only half as much acceleration for the same amount of force
According to this question, when the mass of the object increases from 5kg to 6kg, the acceleration will decrease.
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From the graph, the acceleration of the object would stay the same.
What happens to acceleration?From the Newton's second law we can tell that the force that is acting on an object would be directly proportional to the acceleration. We also have to note that the object would accelerate when there is a net force that is acting on the object.
The question says that the mass of the object increases from 5 kg to 6kg and the net force on the object remains the same. The implication of this is that the acceleration would not also change.
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Describe the acceleration that might occur if the vector representing the man's push were greater in magnitude than the vector representing the normal force of the wall.
Explanation:
The acceleration of an object depends directly up on the net force acting on the object and inversely upon the mass of the object. As the force acting upon an object is increased; According to Newton, an object will only accelerate if there is a net or unbalanced force acting on it, therefore the acceleration is equal to force divided by the mass
a=F/m
a second magnitude star in ursa major is brighter than a fourth magnitude star in orion. TRUE OR FALSE
It is true that a second-magnitude star in Ursa Major is brighter than a fourth-magnitude star in Orion. Hence, the given statement is true.
The star, Sirius is the star with the brightest apparent magnitude as measured on the modern magnitude scale. The star has been assigned a magnitude of −1.5. There are many other objects in the sky that can appear even brighter than the Sirius star.
So the angle between the northern horizon and the northern celestial pole is the same as the angle of latitude. Hence the angle between the northern horizon and the northern celestial pole will be 40 degrees.
The brightest star in the sky according to the ancient magnitude scale is the first-magnitude star. The dimmest star that is visible to the eye is categorized as the sixth magnitude star. Therefore a second-degree star is bright but less bright than a first-magnitude star.
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Help ASAP!
Which statement is true because of Newton's second law?
a.
When the net force on an object increases, the object's acceleration decreases.
b.
When the net force on an object decreases, the acceleration doesn't change.
c.
When the net force on an object decreases, the object's acceleration increases.
d.
When the net force on an object decreases, the object's acceleration decreases.
Answer:
When the net force on an object decreases, the object's acceleration decreases.
Explanation:
i know
A 40.0 resistor is hooked up in series with a 10.00 resistor. The power source is a
12.0 V battery. Find the voltage drop and current for each resistor. Draw the fully
labeled circuit below.
The voltage drop across the 40.0 resistor is 8.00 V and the current is 0.300 A. The voltage drop across the 10.00 resistor is 4.00 V and the current is 0.300 A.
For each resistor, determine the voltage drop and current?Voltage Drop across 10.00 ohm resistor: 12.0 V
Current through 10.00 ohm resistor: 1.2 A
Voltage Drop across 40.0 ohm resistor: 8.0 V
Current through 40.0 ohm resistor: 0.2 A.
The following circuit diagram shows the two resistors connected in series with a 12.0 V battery. The voltage drop and current for each resistor are labeled.\begin{circuitikz}
\draw
(0,0) node[anchor=east]{$12.0V$}
to [V, l_=$V_1=8V, I=0.3A$] (0,2)
-- (2,2)
to [R, l_=$R_1=40\Omega$] (2,0)
to [R, l_=$R_2=10\Omega, V=4V, I=0.3A$] (0,0);
\end{circuitikz}
The voltage drop across the two resistors is equal to the voltage of the battery, 12.0 V. This is known as Ohm's law, which states that the voltage drop across a series resistance is equal to the total voltage of the source. The current through the resistors is the same because the resistors are in series. Therefore, the voltage drop and current values for each resistor are determined by the total voltage of the power source and the resistances of the two resistors.To learn more about Ohm's law refer to:
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which property is unique to electromagnetic waves?
The frequency is a fundamental property of electromagnetic waves. According to Maxwell, a magnetic field develops when the electric field changes.
A time-varying magnetic field is created by an accelerated charge, which then creates a time-varying electric field.
They can move across the water's surface. The gravitational force over them can control them. Structures on Earth can be shook by them. They are capable of travelling in a hoover. Any electromagnetic wave moves at the same constant speed of light. Other characteristics, like frequency, energy, and wavelength, depend on the kind of wave and the source that is creating it. But the speed doesn't change. It is made up of perpendicular time-varying electric and magnetic fields that are both perpendicular to the direction and to each other.
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How much bromine is boiled away if it is heated by a 45 watt heater for 22 minutes? The specific latent heat of
vaporization is 193 000 J kg.
Total amount bromine that will be vapourised by a power of 45 watt if heated for 22 mins is 307.78 gm.
What is Boiling Point ?The temperature at which a chemical transitions from a liquid to a gas is known as its boiling point. Technically speaking, it occurs when the applied pressure and the liquid's vapour pressure are equal (typically the atmospheric pressure).
When a liquid's vapour pressure reaches its surrounding pressure and the liquid turns into a vapour, this temperature is known as the substance's boiling point. Depending on the pressure in the surroundings, a liquid's boiling point can change.
A body or thermodynamic system can emit or absorb latent heat during a constant-temperature process, often a first-order phase transition. Latent heat is energy that is provided or removed in a concealed form to affect a substance's condition without changing its temperature.
We know
total energy will be conserved
therefore,
power*time = specific heat * mass
⇒ 45 * 22 * 60 = 193000 * mass
⇒mass = 0.308kg = 307.77 gm
Total amount bromine that will be vapourised by a power of 45 watt if heated for 22 mins is 307.78 gm.
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Total amount bromine that will be vapourised by a power of 45 watt if heated for 22 mins is 307.78 gm.
What is Boiling Point ?The temperature at which a chemical transitions from a liquid to a gas is known as its boiling point. Technically speaking, it occurs when the applied pressure and the liquid's vapour pressure are equal (typically the atmospheric pressure).
When a liquid's vapour pressure reaches its surrounding pressure and the liquid turns into a vapour, this temperature is known as the substance's boiling point. Depending on the pressure in the surroundings, a liquid's boiling point can change.
A body or thermodynamic system can emit or absorb latent heat during a constant-temperature process, often a first-order phase transition. Latent heat is energy that is provided or removed in a concealed form to affect a substance's condition without changing its temperature.
We know
total energy will be conserved
therefore,
power*time = specific heat * mass
⇒ 45 * 22 * 60 = 193000 * mass
⇒mass = 0.308kg = 307.77 gm
Total amount bromine that will be vapourised by a power of 45 watt if heated for 22 mins is 307.78 gm.
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The coordinates of a bird flying in the xy-plane are given by x(t) = αt and y(t) = 3. 0 m - βt2, where α = 2. 4 m/s and β = 1. 2 m/s2. (a) Sketch the path of the bird between t = 0 and t = 2. 0 s. (b) Calculate the velocity and acceleration vectors of the bird as functions of time. (c) Calculate the magnitude and direction of the bird’s velocity and acceleration at t = 2. 0 s. (d) Sketch the velocity and acceleration vectors at t = 2. 0 s. At this instant, is the bird’s speed increasing, decreasing, or not changing? Is the bird turning? If so, in what direction?
The velocity vector of the bird as a function of time 2.4√1+ t². The velocity and acceleration vectors of the bird as functions of time v = 5.367 m\s
Evaluating the velocity vector :
x (t) =[tex]\alpha[/tex] t
dx /dt = [tex]\alpha[/tex]
The x-component is, dx/dt = [tex]\alpha[/tex]
y(t) = 3. 0 m - βt²
dy/dt = - 2βt
The y-component is , dy/dt = -2βt
Now we must compute the bird's velocity vector as a function of time.
vector V = √x² + y²
When we now incorporate the values of the x- and y-components into this equation, we obtain,
Vector V = √x² + y²
= √[tex]\alpha[/tex]² +( -2βt )²
= √(2.4)² + ( -2 × 1.2 × t)²
= 2.4 √1 + t²
B. x'' (t) = 0
y''(t) = - 2.4
α = x'' (t) , y''(t)
= ( 0 , 2.4 )
C. t = 2 sec.
|v| = √2.4² + ( -2.4 × 2)²
v = 5.367 m\s
D. Taking from a
tan θ = - t = -2
t = 2
θ = 360 ° - 63.43
= 297°
2. at this instant , the bird speed is increasing , the bird is turning in vertical axis .
Vector velocity :
The rate of an object's position change is represented by a velocity vector. A velocity vector's magnitude indicates an object's speed, while the vector's direction indicates its direction. The principles of vector addition can be used to add or subtract velocity vectors. magnitude of a vector's velocity.
Exactly why is velocity a vector?Because velocity has magnitude as well as direction, it is a vector quantity. Speed, on the other hand, is a scalar quantity because it only has a magnitude and no direction.
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the sledde rshown starts from the top of a frictionless hill and sldies down into the valley what is the inivital vi does the sleeder need 4.2 5.9
The sledder needs an initial speed of 10.64 m/s to just make it over the next hill.
To determine the initial speed required for the sledder to just make it over the next hill, we need to use the conservation of energy principle. The initial potential energy of the sledder at the top of the first hill is mgh1, where m is the mass of the sledder and g is the acceleration due to gravity.
As the sledder slides down the first hill, this potential energy is converted into kinetic energy. At the bottom of the first hill, the sledder's kinetic energy is 1/2mv², where v is the sledder's velocity.
To just make it over the next hill, the sledder's kinetic energy at the bottom of the first hill must be equal to the potential energy the sledder needs to reach the top of the second hill, which is [tex]mgh_2[/tex].
So the initial speed can be calculated by:
[tex]v_i[/tex] = √(2g[tex]h_2[/tex])
where [tex]h_2[/tex] = 5.9m, g = 9.8 m/s²
[tex]v_i[/tex] = √(29.85.9) = √(113.24) ≈ 10.64 m/s
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The question is -
The sledder starts from the top of the frictionless hill and slides down into the valley: Suppose that h1 4.2 m and 5.9 Part A What initial speed Vi does the sledder need to just make it over the next hill?
The work done in accelerating an object along a frictionless, horizontal surface is equal to which of the followings?
a) the change in the objectтАЩs potential energy b) the change in the objectтАЩs momentum c) the change in the objectтАЩs kinetic energy
d) the change in the objectтАЩs velocity
The effort done in speeding an object down a frictionless, horizontal surface was equal as the change throughout potential energy.
The two examples above show the two types of potential energy that will be mentioned: gravitational potential energy as well as elastic potential energy. The energy held in an object because a result among its vertical position as well as height was referred to as gravitational potential energy.
The energy that was stored because a result of such Earth's gravitational attraction to the item. The gravitational potential energy of a demolition machine's heavy ball is determined by two variables: the mass of such ball as well as the height from which it was elevated.
There exists a direct relationship between gravitational potential energy as well as object mass. The gravitational potential energy of larger objects is greater.
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what is the maximum speed for a car rounding a 125 m curve on a highway under very icy (no friction) conditions if the banking angle is 20.0o.
the maximum speed for a car rounding a 125 m curve on a highway under very icy (no friction) conditions if the banking angle is 20.0 is 70.3 km/h.
If a car is driving on a highway with a banking angle of 20.0o and icy (no friction) conditions, the maximum speed it can reach while rounding a 125 m curve is determined by the following calculations:
The maximum centripetal acceleration (a) is equal to the gravitational acceleration (g) multiplied by the sine of the banking angle (θ). In this case, a = g * sin(20.0o) = 9.8 m/s2 * 0.3420201433 = 3.36 m/s2.
The maximum speed (v) is then equal to the square root of the maximum centripetal acceleration (a) multiplied by the radius of the curve (r). In this case, v = √(3.36 m/s2 * 125 m) = 19.6 m/s = 70.3 km/h.
Therefore, the maximum speed a car can reach while rounding a 125 m curve on a highway under very icy (no friction) conditions if the banking angle is 20.0o is 70.3 km/h.
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what does the electronic stability control system designed to do?
Electronic stability control system designed to prevent lose control of the vehicle in the high speed and skidding when cornering at high speed.
What is the electronic stability control system?
electronic stability control system or ESC system also called as dynamic stability control or electronic stability program is a computerized technology which increases a vehicle's stability by reducing and detecting loss of traction. ESC is proven to be effective in decreasing roll over crashes and the accident of single vehicle. Vehicles equipped with ESC are told has 32% lower single-vehicle crashes and 58% lower roll-over crashes that cause in driver injury.
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