Microwaves are very efficient at heating water the reason is The microwave's heat waves are focused on the liquid (or food), not on heating the air or container around it.
How can water be heated most effectively?Due to their high efficiencies and significant cost savings, heat pump water heaters transfer heat from one location to another instead of producing heat directly to supply hot water. Solar water heaters provide hot water by utilising the sun's heat while also reducing energy costs.
However, a microwave would typically be a little more effective at heating water than a gas stove's flame and should consume a little less energy. The cause is that the heat waves from the microwave are directed at the liquid (or food), not at the air or container it is in.
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A sound wave with amplitude xo is measured by an observer to have an intensity of I0 when the observer is standing 4. 0 meters from the source. Which best describes the amplitude of a sound wave and distance from the source where it will be measured with an intensity of 16Io? Increase the amplitude to 8xo and stand 2 meters from the source. Increase the amplitude to 4xo and stand 10 meters from the source. Increase the amplitude to 2xo and stand 2 meters from the source. Increase the amplitude to 4xo and stand 8 meters from the source
Increase the amplitude to 4xo and stand 8 meters from the source. A sound wave with amplitude xo is measured by an observer to have an intensity of I0 when the observer is standing 4. 0 meters from the source.
What is source?Source is a term used to describe the origin or starting point of something. It can refer to the origin or beginning of a physical object or concept, like the source of a river or the source of a new idea. It can also refer to the person or thing that supplies or produces something, such as the source of a story or the source of a product.
In science, source is used to describe the origin or cause of something, such as the source of an infection or the source of an environmental pollutant. Source, in its various forms, is a key concept in many fields, from engineering and science to business and economics.
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Answer:
C.
Explanation:
Increase the amplitude to 2xo and stand 2 meters from the source.
A rocket sled of mass 100.0 kg has an engine that is capable of exerting 187.5 W of power. If none of the work done by the engine is lost to friction or drag, and the sled starts at rest, what is the velocity of the sled after one minute?
The velocity of the sled after one minute is 10.6 m/s.
What is the velocity of the sled?
The velocity of the sled after one minute is calculated by applying Newton's second law of motion and formula instantaneous power as shown below.
P = Fv
where;
P is the powerF is the applied forcev is the velocityP = mav
P = m (v/t)v
P = mv²/t
Pt = mv²
v² = Pt / m
v = √ ( Pt / m )
where;
P is the powerm is the masst is the timeThe velocity of the sled after one minute is calculated as;
v = √ ( 187.5 x 60 / 100 )
v = 10.6 m/s.
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Assignment Steel bas each of throplet 3m at 29°C are to be used for constructing a-al line. If the linea, expanquity of Steel is 1.0x 10-5K+, calculate to safety gap that must be left between successive bars if the highest temperature expected is 41°c.
It should be noted that the safety gap between successive bars should be equal to the length change of one bar.
Define highest temperature?
The maximum temperature is the highest temperature at a given location during a given time period. The maximum temperature has no upper limit. It can reach extremely high levels, to the point where they cannot be measured.The Planck Temperature (100 million million million million million degrees Celsius) is the theoretical maximum temperature that can be reached, but the Hagedorn Temperature is even higher, at 2 x 1012 degrees. That's quite a few zeros. And it could go even further, depending on how nature is built at its most basic level.Temperature refers to the measurement of a substance's hotness or coldness. When two bodies come into contact, it determines the direction of heat flow. Kelvin is the SI unit of temperature. The other units used to calculate temperature are Celsius and Fahrenheit.To learn more about Temperature refers to:
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Camden constructs a model of a double convex lens using two clear plastic circles that are round on one side and flat on the other. He attaches the circles at the edges. How does his model look?
Using two circular, flat, clear plastic circles that he attaches at the edges, Camden creates a model of a double convex lens that appears thicker in the center and thinner at the edges.
What do you call a double convex lens?Bi-convex (Double-convex) lenses focus parallel light rays to a single point similarly to plano-convex lenses because they have the same radius of curvature on both sides of the lens. As a general rule, bi-convex lenses work best with conjugate ratios between 5:1 and 1:5.
By twice refractively (bending) the light rays from a distant object, a double convex lens, also known as a converging lens, concentrates the diverging, or blurred, light rays.
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Is potential energy maximum at the lowest point?
At an object's lowest point, kinetic energy is zero/maximum while potential energy is zerg/maximum. Potential energy is the energy stored by an item as a result of its location relative to other objects.
internal tensions, electric charge, or other reasons. The gravitational potential energy of an item, the elastic potential energy of a stretched spring, and the electric potential energy of an electric charge in an electric field are all examples of common forms of potential energy. The joule, denoted by the sign J, is the unit of energy in the International System of Units Although it has connections to Greek philosopher Aristotle's notion of potentiality, the word potential energy was coined by the 19th-century Scottish engineer and physicist William Rankine. Potential energy is related with forces acting on a body in such a way that the total work is increased.
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A uniform ladder weighing 253 N is leaning against a wall. The ladder slips when itz angle between the horizontal and the wall is 56 degrees. Assuming the coefficients of static friction at the wall and the ground are the same, obtain a wall for the coefficient of friction
The coefficient of friction is 0.306.
The ratio of the normal force pressing two surfaces together to the frictional force preventing motion between them is known as the friction coefficient. Typically, it is represented by the Greek letter mu(μ).
Both rotational equilibrium and translational equilibrium exist.
As a result, both the total of all forces acting on the ladder and the total of all moments must be zero.
The sum of the horizontal forces must be zero:
[tex]F_{nw}[/tex] -a [tex]F_{nf}[/tex] =0
([tex]F_{nw}[/tex]=[tex]F_{normal}[/tex] from the wall, but [tex]F_{nf}[/tex] = [tex]F_{normal}[/tex] from the floor, a= static friction)
The sum of the vertical forces must be zero:
mu [tex]F_{nw}[/tex] - W + [tex]F_{nf}[/tex] = 0
Rotational balance:
[tex]F_{nf}[/tex] x cos(A) x (L/2)-a [tex]\times[/tex][tex]F_{nf}[/tex] sin(A)×[tex]\frac{L}{2}[/tex]- [tex]F_{nw}[/tex]× sin(A) ×[tex]\frac{L}{2}[/tex]- a× [tex]F_{nw}[/tex]× [tex]\frac{L}{2}[/tex]× cos(A)=0
For the three unknowns, we now have three linear equations ([tex]F_{nw}[/tex] , [tex]F_{nf}[/tex], a).
[tex]F_{nw}[/tex] -a [tex]F_{nf}[/tex] =0
[tex]a\times F_{nw}-W+ F_{nf}=0[/tex]
[tex]F_{nf}[/tex] x cos(A) x -a [tex]\times[/tex][tex]F_{nf}[/tex] sin(A)×[tex]\frac{L}{2}[/tex]- [tex]F_{nw}[/tex]× sin(A) ×- a× [tex]F_{nw}[/tex]× cos(A)=0
using the first two give :
[tex]F_{nf}=\frac{W}{1+(a)^{2} }[/tex]
[tex]F_{nw}=\frac{aW}{1+(a)^{2} }[/tex]
substituting these equation in the third give
[tex]\frac{W(cos(A)-asin(A)}{1+(a)^{2} }= - aW[/tex]
[tex]\frac{sin(A)+acos(A)}{1+(a)^{2} }[/tex]=0
This simplifies to
cos(A)-asin(A)-asin(A) - [tex](a)^{2}[/tex] +cos(A)=0
cos(A) [tex](a)^{2}[/tex]+2sin(A)a-cos(A)=0
a=-tan(A)+[tex]\frac{1}{2cos(A)\sqrt{4sin^{2}A +4cos^{2}A }} =-tan(A)+\frac{1}{cos(A)}[/tex]
putting in the angle of A=56° gives
[tex]-tan(A)+\frac{1}{cos(A)}[/tex]
a=0.36
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Where is the highest potential energy on a swing?
The highest Potential energy on a swing is at the top of its oscillation or the highest point of its arc.
A swing is a type of oscillating system that moves back and forth, and it is driven by the gravitational force acting on its center of mass. The Potential energy of a swinging object is determined by its position relative to a reference point. The highest point of the swing is the point where the potential energy is at its maximum, and the lowest point of the swing is where the potential energy is at its minimum.
As the swing goes up, the gravitational potential energy increases, and as it goes down, the gravitational potential energy decreases. At the highest point of the swing, the speed of the swing is zero and the gravitational potential energy is at its maximum, at this point all of the energy is stored as potential energy. As the swing goes down, the potential energy decreases and the kinetic energy increases and at the lowest point of the swing kinetic energy is at its maximum and potential energy is at its minimum.
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What happens when angle of incidence is 90 in refraction?
The angle of incidence is also 90o since the angle of refraction and the angle of incidence are complimentary angles that are measured from the light beam to the normal to the incident/refractory surface.
The angle of incidence is the angle formed by the normal and the light beam. You calculate the angle between the light ray and the normal, which is 0 degrees. Angle of incidence: This is the angle formed between the incident beam and the normal. Angle of reflection is the angle that is created between the incident and reflected rays. At the point of incidence, the normal line is the one drawn perpendicular to the reflecting surface. The angle of incidence is the angle formed by a line drawn perpendicular to the reflecting barrier and the wave's direction of travel.
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What are the two forces that maintain balance within a star until fusion begins to slow down?
Stars endure their whole existence in a finely defined equilibrium, or balance, between two strong forces: gravitational pull and outward pressure.
What are the two factors that a main sequence star must balance? Thermal pressure (heat produced by fusion) pushes the star outward while self-gravity pulls it inward and tries to cause it to collapse. A main sequence star is steady because these two factors balance one another out.Gravitational collapse is the process by which the substance of the star is drawn inward by the force of gravity. The expansion of the star caused by fusion energy is a result of pressure pushing the star's material outward.Stars endure their whole existence in a finely defined equilibrium, or balance, between two strong forces: gravitational pull and outward pressure.To learn more about fusion energy refer to:
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When we look at an object that is 1,000 light-years away we see it _________.
Answer:
Explanation:
blb
A piece of Gold can not be separated by physical means or chemical means
into its parts, and it is the same throughout... What would it be classified?
mixture
as a homogeneous
as a compound
as an element
as a heterogeneous mixture
A piece of Gold can not be separated by physical means or chemical means into its parts, and it is the same throughout as a homogeneous
What is homogeneous mixture?A homogeneous mixture is a gaseous, liquid or solid mixture that has the same proportions of its components throughout a given sample. It is uniform in composition throughout. There is only one phase of matter observed in a homogeneous mixture.Homogeneous mixture: A mixture in which the components are uniform in the whole solution, its composition is the same throughout and it appears like a single substance, is a homogeneous mixture. Examples: Air is a homogeneous mixture of gases. Salt solution is a homogeneous mixture of common salt and water.Homogenous: milk, kool-aid, blood, lotion, window cleaner, glue, etc. Heterogenous: pizza, cereal and milk, rocks in the sand at the beach, banana splits, etc. Homogeneous mixtures cannot be separated, while heterogeneous mixtures can be separated.
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Usain Bolt is running around a circular curve on a flat track. The radius is 30 m, his speed is a constant 11 m/s, and his mass is 85 kg.
Caicuiate the centripetai force that allows him to run around this curve.
The centripetal force that allows Usain Bolt to run around a circular curve on a flat track under those conditions, is equal to 342.83 N.
Centripetal force is a force that acts on a body which is moving in a circular path while the direction of this force is towards the centre around which the body moves. See the attached image for reference.
For a mass [tex]M[/tex] with tangential speed [tex]v[/tex] at circular path of radius [tex]R[/tex], the centripetal force ([tex]F_{c}[/tex]) is [tex](Mv^{2})/R[/tex].
Thus using the formula we can calculate the value of centripetal force.
Mass of Usain Bolt = 85 kg
Radius of circular curve = 30m
Speed of Usain Bolt = 11 m/s
Centripetal force = [tex](Mv^{2})/R[/tex]
= (85 × 11 × 11) / 30
= 342.83 Newton [ [tex]1 N =[/tex] [tex]1kgm/s^{2}[/tex] }
We can also find the centripetal acceleration using the information with us.
Centripetal acceleration = Centripetal Force/ Mass of the body
= 342.83 / 85
= 4.03 [tex]m/s^{2}[/tex]
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if you are looking at a star 100 light-years away, for how many years has the light that you're seeing been travelling?
100 years has the light you are seeing been traveling. It is the distance traveled by light in 100 years, with the speed of light.
As the light year is the unit of length which is equal to the distance traveled by light with the speed of light in one year. It very large distance and it is used to measure the distance between two stars or the distance between stars from earth.
The distance in one light year is 46 trillion kilometers. As the star is 100 light years away which is 4,600 trillion kilometers. And to travel the light from star to earth it will take 100 years.
What we are seeing is 100 years past of that star, we even do not whether that star is still alive or dead. We can only see the past.
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a driver ignores the stop sign and continues driving east at constant speed.
Since the velocity is represented by the slope on a position versus time graph, a car moving at a constant speed must be represented by a line of constant slope.
What distinguishes acceleration from constant speed?The following diagram illustrates the differences between an object with constant acceleration and one with constant speed. While the speed of the other object stays constant, the speed of the object with linear acceleration increases linearly with time and distance.
How fast is a constant speed?An object moving at a constant speed could be compared to an object in orbit. "Constant speed" refers to a speed that doesn't change over time—rather, it just stays the same. This indicates that both velocity and acceleration are absent or equal to zero.
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How is torque calculated in vector with example?
Torque is measured as a vector quantity. The torque vector's direction has been determined by the force upon this axis.
Torque would be a twisting force that refers to the rotating force of an engine as well as determines the percentage of that twisting force accessible when the engine exerts oneself. Torque can be found in everyday activities such as turning a doorknob, breaking a drink bottle, using a tool, and peddling a bicycle.
Example: T = F r sin would be the torque. As a result, the magnitude of such torque = (800N) (0.4m) = 320 Nm. As a result, the magnitude of such torque was 320 Nm.
Torque is defined as the combination of force (unit N) as well as the perpendicular distance (unit m) of the force line from either the axis. As a result, the SI unit of torque becomes Nm.
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Two identical metal balls are suspended by insulating threads. Both balls have the same net charge. In this problem, do not assume the balls are point charges.
In this situation, both balls will exert electrostatic force on each other in the first example.
How to calculate charge? The two balls will repel each other due to this electrostatic force.Aside from that, there will be a downward gravitational force on the two balls.Now we know that as the electrostatic force of repulsion between two balls increases, so will the angle between the two balls as the horizontal force separates the two balls.Part b)
We know that the net electrostatic force between two balls depends on the product of two charges, therefore as we reduce the charge on one ball, the net electrostatic force between two balls decreases.As a result, the angle between the two balls decreases and the two balls move closer together.Also, we can see from the free body diagram of two balls that all of the forces acting on the balls are the same, hence the angle formed by the ball with the vertical is the same for both balls.As a result, the angle formed by ball l with the vertical is equal to the angle formed by ball 2 with the vertical.For more information on charge kindly visit to
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Complete question : Two identical metal balls are suspended by insulating threads. Both balls have the same net charge. In this problem, do not assume the balls are point charges. a. Draw a separate free-body diagram for each ball. Label the forces to indicate: - the object exerting the force, - the object on which the force is exerted, - the type of force (gravitational, normal, etc.), and - whether the force is a contact or a noncontact force. b. Suppose the charge on the second ball is reduced slightly, so that it is less than that on the first ball. Predict whether the angle that ball l makes with the vertical will be greater than, less than, or equal to the angle that ball 2 makes with the vertical. Explain. Sketch your answer above. Name Ball I Ball 2 Free-body diagram Free-body diagram for ball I for ball 2 - - Ball I Ball 2 How does the free-body diagram for each ball in this case compare to the corresponding freebody diagram that you drew in part a
a cannon shell is fired straight up from the ground at an initial speed of 210 m/s. after how much time is the shell at a height of 6.00 102 m above the ground and moving downward?
It will take 43.075 seconds for the shell to reach the distance of 6.00*10^2 m.
Use the equation of motion y(t) = y₀ + v₀t + ½at² -----(1) for finding the time taken to reach a particular height, Which is 6.00*10^2 = 600 meters. The motion of the shell will be projectile as g(gravitational) pull will be acting against the motion.
So
✦ Plug in the values of the equation.
✦ 600 = 225t - 4.9t² .................... Putting the values in Equation 1
✦ Reorder the equation to form it into the quadratic formula.
✦ 4.9t² - 225t + 600 = 0
✦ Solve for t
✦ t = 43.075
It will take 43 seconds for the shell above the ground.
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A cannon fires a cannonball vertically with an initial velocity of vi=16m/s at time t=0s. The cannon experiences an acceleration due to gravity of a = -9.8 m/s^2. If the cannonball starts at x0=1 m above the ground, what is its final position after 2.5 seconds? Make sure to include annotations, standard equations, work, answers, units, and explanations for full credit.
The position of the cannonball at 2.5 seconds is 9.375 meter.
What is acceleration?
Acceleration is the rate at which speed and direction of velocity 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.
Acceleration is a vector quantity since it has both a magnitude and a direction.
Hence, the position of the cannonball at 2.5 seconds is
= 16 m/s × 2.5 s + 1/2 × (-9.8)× (2.5 s)²
= 9.375 meter.
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What does it mean to have 0 acceleration?
To have a zero acceleration means that the object in question has a constant velocity, since acceleration is the increase in speed per unit time in any particular direction.
As velocity of an object or a body is the rate of change of displacement and the acceleration of that object or that body is the rate of change of velocity, we can infer that to have a zero acceleration, the object or the body needs to displace from a point to another without changing it's velocity.
The object accelerates if the acceleration is in the same direction as velocity and it decelerates if the acceleration is in the opposite direction as velocity. For example, when a body is thrown upwards, acceleration due to gravity ([tex]g[/tex]) slows down the body and for a free falling body, acceleration due to gravity increases the velocity of the body.
According to Newton's second law of motion, the total of all forces acting on a body is equal to the value of multiplication of the mass of the body and the acceleration of the body. Thus for an object to have zero acceleration, the total sum of all forces acting on that body must be zero, in other words, there must be no unbalanced forces acting on the body.
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What does a horizontal line describe in a vs t graph?
A horizontal line in a vs t graph shows that the change in acceleration with time is 0.
The acceleration-time graph depicting the acceleration as a function of time for a particle traveling in a straight line is shown below. Acceleration values are plotted on the y-axis of the acceleration-time graph, while time values are plotted on the x-axis.
On the graph of acceleration vs time, the horizontal line indicates that there has been no change in acceleration with respect to the passage of time. The magnitude of the acceleration maintains its original value regardless of the passage of time. This kind of acceleration is referred to as either uniform acceleration or constant acceleration.
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what type of heat transfer is responsible for an ice cube melting in your hand?
An ice cube will shortly melt if you grasp it in your hand. Conduction is the direct heat transfer from one matter to another. Hence, it is conduction.
If two objects have various temperatures, heat will flow from the hot object to the colder side. For instance, when you hold an ice cube, heat is moved from your warm hand to the ice and melts it.
Liquids and gases increase as they heat up and fall as they cool, generating circular convection currents.
We touch the ice cube it will begin melting which means that the energy is being moved from our hand to the ice cube. When energy is conveyed from surroundings to the system, this is an endothermic move and so, ΔH>0.
On the opposite, when your hand meets an ice cube or any object with a lower ambient temperature than your hand you start to feel cold, as body heat is moved to the colder object.
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Is speed zero at the highest point?
Because the acceleration caused by the gravitational force is operating constantly downward at the greatest point when a body is thrown vertically upwards, only that point's speed is zero. As a result, velocity is zero because of the acceleration.
When an item is moving, its velocity is the rate at which it is changing position as seen from a certain point of view and as measured by a specific unit of time.
It is obvious that there is a higher point in the trajectory than the place we were calling the highest point. A point can only be the highest point if the vertical component of velocity is zero there.
A projectile's velocity is zero at its highest point. A projectile's acceleration is zero at its maximum point.
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Two bowling balls each have a mass of 6. 8 kg. The centers of the bowling balls are located 21. 8 cm apart. What gravitational force do the two bowling balls exert on each other?.
Two bowling balls each have a mass of 6. 8 kg. The centers of the bowling balls are located 21. 8 cm apart, The gravitational force do the two bowling balls exert on each other is
6.49 x 10⁻⁸ Newtons.
What does gravity mean?The attraction that the earth has on a body is known as gravitational force. Example: Because of gravity, leaves and fruits fall from a tree and land on the ground.
Objects with mass are drawn toward one another by the gravitational force, also known as the force of gravity. The gravitational pull of the Earth is something we consider frequently. Your body is kept stationary on the ground by this force. However, every other mass-containing object experiences a gravitational pull from every other mass-containing object.
F= G×((m₁×m₂)/r²)
F = 6.67x10⁻¹¹× ((6.8×6.8)/.218)
F = 6.49 x 10⁻⁸ Newtons.
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After the big bang, what did hydrogen atoms fuse into?
After the big bang, the universe was too hot and too dense for the elements to form. Hydrogen didn't appear until the universe spread out and then cooled. The formation of protons and neutrons occur. Later, the simple atoms form.
This process takes place in the initial 10-12 minutes after the big bang, where neutrinos, quarks and electrons are formed. The quarks merged into nucleons as the universe cooled. Further expansion and cooling allowed the neutrons and protons to fuse helium nuclei. The condensation phase, which lasted for the first three minutes, is responsible for the 73% hydrogen and 25% helium abundances that are present in the universe today. The 2% of heavier-than-helium nuclei that are still in the cosmos today were produced later in stars. But after 20 minutes, nucleosynthesis ended and no further nuclei could form.
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a 4.0 kg object is moving 3.0 m/s across a 0.75 m high table. how much mechanical energy does the object-earth system have relative to the ground?
The mechanical energy that the object have relative to the ground is 18 J
The energy that is possessed by an object because of its motion or because of its position is referred to as the object's mechanical energy. The term "mechanical energy" refers to the total amount of an object's kinetic and potential energies added together. To find the mechanical energy, we can use this following formula:
Mechanical Energy (M.E.) = Kinetic Energy (K.E.) + Potential Energy (P.E.)
Kinetic Energy (K.E.) = (1/2) m v²
Potential Energy (P.E.) = m × g × h
According to the data, we are given that:
The mass of object (m) = 4 kg
The velocity of object (v) = 3.0 m/s
The acceleration due to gravity (g) = 9.8 m/s
The height of object from ground (h) = 0.75 m
Potential energy in this case is 0 because the object is moving.
Hence, the mechanical energy would be:
Mechanical energy = (1/2) m v² + m x g x h
Mechanical energy = ((1/2) x 4 x 3²) + 0
Mechanical energy = 18 + 0
Mechanical energy = 18 j
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A book with a mass of 5 kg is pushed off a table with the velocity of 2 m/s. What is its momentum?.
Momentum formula:
[tex]p=mv[/tex]
momentum(measured in n*s) = mass(measured in kg) * velocity(measured in m/s)
__________________________________________________________
Given:
[tex]m=5kg[/tex]
[tex]v=2m/s[/tex]
[tex]p=?[/tex]
__________________________________________________________
Finding momentum:
[tex]p=mv[/tex]
[tex]p=5\times2[/tex]
__________________________________________________________
Answer:
[tex]\fbox{p = 10 N*s}[/tex]
Answer:p = 10 n*s
Explanation:
In triangle jkl, sin(b°) = three fifths and cos(b°) = four fifths. if triangle jkl is dilated by a scale factor of 2, what is tan(b°)? triangle kl in which angle k is a right angle and angle l measures b degrees tan(b°) = five thirds tan(b°) = four thirds tan(b°) = three fourths tan(b°) = five fourths
The tanb° of triangle jkl is 3/4, that is, three forth.
What is trigonometry?In the field of mathematics known as trigonometry, correlations between angles and length ratios are studied.
Trigonometry has a wide variety of identities. With the intention of simplifying an expression, finding a more practical form of an expression, or solving an equation, these trigonometric identities are frequently employed to rewrite trigonometrical expressions.
Given that
sin(b°) = three fifths and cos(b°) = four fifths.
sinb° = 3/5
cosb° = 4/5
So, tanb° = sinb°/cosb°
=( 3/5)/(4/5)
= 3/5 × 5/4
= 3/4
Hence, tanb° of triangle jkl is 3/4.
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Identify the action-reaction force pair in each of the following scenarios.
A. A skier uses her ski poles to start moving downhill.
B. A boat propeller spins rapidly in the water.
C. A baseball player hits a pitched ball with a bat.
D. A party balloon contains rapidly moving helium atoms.
The action-reaction force pairs are the pairs of forces which have an equal and opposite magnitude and direction on the object.
What is Action-reaction force?Action-reaction force pairs are the forces of equal magnitude and opposite directions which can act on different objects. They never act on the same object present in the space. Newton's third law states that forces are the result of interactions. An object cannot exert a force on another object without feeling any reaction force itself.
A. A skier uses her ski poles to start moving downhill, in this case the skier is applying a force on the ski poles to move forward however, there is resistance force against it.
B. A boat propeller spins rapidly in the water. A propeller applies force to move in the water however, if it is in the direction of motion of water, then it moves faster otherwise it will face resistance.
C. A baseball player hits a pitched ball with a bat, in this case while pitching the ball, the baseball player will experience a force against the direction of throw
D. A party balloon contains rapidly moving helium atoms, in this case the rapidly moving atoms exert force on the balloon which is balanced by the force applied by the balloon material on it. If the force of helium atoms increase, then the balloon may blast.
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Which object reflects light with the longest wavelength
The longest wavelength are gamma rays.
Which object has longest wavelength?The strongest, shortest, and most powerful rays are known as gamma rays. The lowest energy, longest wavelengths, and lowest frequencies of any sort of EM radiation are found in radio waves, on the other hand.The shortest wavelength is found in gamma rays. The numerous forms of radiation and their associated wavelengths are displayed in the table below. various radiation types WavelengthRadio waves 20 cm
Infrared waves
0.3 mm - 20 cm
Infrared waves
800 nm - 0.3 mm
400 to 800 nm of visible light
X-rays 3 pm–300 pm, ultraviolet radiation 300 pm–400 nm
Gamma rays 3 pm.
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Will pendulums at higher heights go faster or slower?
Pendulums at higher heights will have a greater potential energy and will therefore go faster. The potential energy of a pendulum is directly proportional to its height above its lowest point.
A pendulum's potential energy will rise when it is elevated to a higher altitude. This is due to the pendulum being drawn towards the Earth's center by the force of gravity acting on it. The gravitational force acting on the pendulum increases with height above its lowest point, increasing its potential energy. Potential energy is transformed into kinetic energy, or the energy of motion, when the pendulum is released. The kinetic energy will be transformed back into potential energy and vice versa when the pendulum swings back and forth. The pendulum will swing faster and for a longer amount of time due to the rise in potential energy.
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