You may calculate the voltage drop of the circuit conductors by multiplying the circuit's current by all of their combined resistance:
VD = I x R.
How do you calculate voltage drop current and resistance?According to Ohm's Law, voltage (V), current (I), and resistance (R) are equal to one another.Each resistor's voltage loss in a series circuit will be inversely correlated with its size. Resistor R2 (unknown) = 0.5 ohms.
You may calculate the voltage drop of the circuit conductors by multiplying the circuit's current by all of their combined resistance:
VD = I x R.
V = I R using Ohm's law
R = V/I
R = 4.5 / 0.6
R = 7.5 ohms
R = R1 + R2
R2 = R - R1
R2 = 7.5 - 7
R2 = 0.5 ohms
2. R1 voltage loss = 4.2 volts
V = I × R1
V = 0.6 × 7
V is 4.2 volts.
3. 0.3 volts of voltage drop across R2
V = I × R2
V = 0.6 × 0.5
V is 0.3 volts.
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How do you find the cross product of two vectors with right hand rule?
The cross product of two vectors is perpendicular to the both the vectors, which is easily determined by the right hand rule.
Right hand rule is used to determine the direction of the vector that is cross product of two vectors. If we point our right hand's index finger in the direction of vector a, and middle finger in the direction of vector b, then our thumb will indicate the direction of the c, which is the cross product of vectors a and b. We should not that, (a×b) ≠ (b×a)
If a×b = c, then the direction of vector C would be perpendicular to both the vectors.
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If a 60 g object has a volume of 30 cm³, what is the object's
density?
a 2 g/cm³
b 1800 g cm
c 0.5 cm /g
d 90 g plus cm²
Answer: a. 2g/cm3
Explanation
density= mass/volume
60g/30 cm3 = 2 g/cm3
1. What is absolute zero?(1 point)
Zero on any temperature scale.
The coldest achievable temperature for a given substance.
The temperature of outer space.
The point at which particle motion completely stops.
2. If hydrogen could be held at absolute zero, what would its form be?(1 point)
Liquid
Superfluid
Solid
Gas
3. As researchers cool a substance close to absolute zero, what happens?(1 point)
The work needed to cool it further decreases, becoming easier.
The work needed to cool it further falls to zero.
The work needed to cool it further increases.
Work is done on the environment by the substance.
4. Why can’t absolute zero be achieved?(1 point)
Technology isn’t capable of it yet.
Supercold superfluids have no friction.
We can’t describe an absolute value of cold.
It would require infinite work done on the substance.
The correct answers are:
Absolute zero is option A:The coldest achievable temperature for a given substance.SolidThe work needed to cool it further increases.It would require infinite work done on the substance.What is the temperature scale?Absolute zero is the coldest temperature possible, the point at which the thermal motion of all particles comes to a complete stop. At absolute zero, hydrogen would be in a solid form
As researchers cool a substance close to absolute zero, the work needed to cool it further increases as the substance gets closer to absolute zero.
Therefore, Absolute zero cannot be achieved because it would require infinite work done on the substance, which is impossible according to the Third Law of Thermodynamics.
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What is the product of force and lever arm distance which tends to produce or change rotation called?
The product of force and lever arm distance which tends to produce or change rotation called torque.
Torque is a unit of measurement for the force that can cause an object to revolve about an axis.
A force applied perpendicular to a lever arm produces a torque, which is the result. The distance that runs perpendicularly from the pivot point, or the centre of rotation, to the location where the force is delivered, is known as the lever arm or moment arm. A pivot point is always used to define a torque.
Each gearing stage of a torque multiplier amplifies the torque applied to the bolt. For instance, a torque multiplier with a 5:1 ratio will produce an output at the shaft that is five times the torque, but because no energy can be produced, the speed will only be one fifth of the original.
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Fill in the missing for each of the statements below:
Answer:
Explanation:
a. thermal
b. waste
c. chemical, electrical
d. efficiency
the blue line of the hydrogen emission spectrum has a wavelength of 433.9 nm.calculate the energy of one photon of this light.
The energy of one photon of the blue light of wavelength 433.9 nm is 4.58×10⁻¹⁹ J or 2.857 eV.
The relation between energy and wavelength can be derived from Plank's equation.
E = hυ
h is plank's constant and υ is the frequency.
Frequency and wavelength is related as
c = υλ,
c is the velocity of light in vacuum
υ is the frequency and λ is the wavelength
From that, υ = c/λ
Substituting in the equation of energy,
E = hυ = hc/λ
h= 6.626 ×10⁻²⁶
c = 3× 10⁸
λ = 433.9 nm = 4.339 ×10⁻⁷ m
Substituting the values,
E = ( 6.626 ×10⁻²⁶ × 3× 10⁸) / 4.339 × 10⁻⁷
= 4.58 × 10⁻¹⁹ J = 2.857 eV.
So the energy of one photon is 4.58 × 10⁻¹⁹ J or 2.857 eV.
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What is the final speed of the rocket once the engine has fired? (ignore the change in mass as the engine fires and ignore the weight force during the short duration of the engine firing. ).
Once the engine has fired, the rocket's final speed is 29.16 m/s whose impulse is of 3.5 kgm/s and mass is 120g.
We match the momentum data to the amount of movement using the momentum and amount of movement concept to determine the speed.
Given the mass of rocket (m) = 120g = 0.12kg
Impulse of engine (I) = 3.5kg-m/s
Let the final speed of rocket = v
We know that Impulse is equal force multiplied by time. I = F x t
Then, impulse can also be calculated mass multiplied by velocity according to momentum of rocket. So, I = m x v
Then, m x v = I
Here we neglect the weight force during the brief engine firing as well as the change in mass that occurs.
v = 3.5/0.12 = 29.16m/s
Hence once the engine has fired, the rocket's final speed is 29.16 m/s.
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complete question: Model rocket engines are rated by the impulse that they deliver when they fire. A particular engine is rated to deliver an impulse of 3.5 kg⋅m/s. The engine powers a 120g rocket, including the mass of the engine. Part A What is the final speed of the rocket once the engine has fired? (Ignore the change in mass as the engine fires and ignore the weight force during the short duration of the engine firing.)
Why did many ancient greek astronomers believe in a geocentric explanation of our universe?
Many ancient greek astronomers believe in a geocentric explanation of our universe because they believed that we revolves around the sun.
Man has always been captivated by learning about the universe's beginnings. Similar to this, man has frequently been impacted by his creationist beliefs, which hold that the universe and everything in it were created by a supreme being. For instance, some of the oldest known hypotheses about the creation of the cosmos were created by the Ancient Greeks. Unfortunately, a lot of ancient Greek astronomers and philosophers positioned the Earth in the center of their universe models. They reasoned that the cosmos must be geocentric—that is, the Earth must be in its center—if the skies are divine and the gods created man.
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in terms of the scientific method, how does astronomy differ from a lab science like chemistry or biology? how can astronomers be confident of their understanding of objects that are remote from the earth?
Astronomy differs from lab sciences like chemistry or biology in that it is an observational science.
This means that astronomers primarily gather data through the use of telescopes and other instruments to observe objects in space, rather than performing experiments in a laboratory setting.
One of the main challenges in astronomy is that the objects being studied are often extremely distant and difficult to observe directly.
However, astronomers have developed a variety of techniques to study these objects, such as analyzing the electromagnetic radiation they emit, studying their motions and positions, and using computer simulations to model their behavior.
Astronomers can be confident in their understanding of remote objects by using multiple methods to study them and by comparing their results to existing theories and models.
They also use statistical analysis to quantify the uncertainty of their measurements and observations.
In conclusion, while astronomy shares some similarities with lab sciences, it differs in that it is an observational science and the objects being studied are remote.
Astronomers overcome these challenges by using a variety of techniques and by cross-checking their results with existing theories and models.
They also quantify the uncertainty of their measurements and observations to ensure the confidentiality of their understanding of remote objects.
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water flows through a 2.9-cm -diameter hose 3.5 m/s . how long, in minutes, will it take to fill a 600 l child's wading pool?
The time taken by a 2.9cm diameter water hose to fill the 600-liter pool is 4.58 minutes.
The diameter of the hose, d =2.9 cm. Velocity, v=3.3 m/s= 330 cm/s. The amount of water following through the cross-sectional area of the hose = πr². Diameter = 2.9 cm so radius, r=1.45 cm. A= 3.14×2.10 = 6.601 cm². The cross-sectional area of the hose is approximately 6.601 cm². To the volume of water that flows through the hose each second, multiply its velocity by the cross-sectional area of the hose. Volume/ second = 330×6.601=2178.61 cm³/sec . There are 1000 cm³ in one liter. Total volume =600×1000 =600000 cm³. To determine the time in seconds, divide the total volume by the volume per second, t = 600000/2178.61 =275.40 sec. This is roughly 275 seconds. Now convert 275 seconds into minutes, t (mins) = 275/60 =4.58 minutes.
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Lucy stands on a stepladder to place a fridge magnet at the top of her fridge door. Which of the following energy stores does the magnet have energy in?
Lucy stands on a stepladder to place a fridge magnet at the top of her fridge door. The magnet have potential energy in.
What is potential energy?Potential energy in physics is the energy that an item retains as a result of its position in relation to other objects, internal tensions, electric charge, or other elements.
The gravitational potential energy of an item is a examples of common types of potential energy.
As Lucy stands on a stepladder to place a fridge magnet at the top of her fridge door, the magnet have gravitational potential energy in.
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which of the following statements about lift is most accurate? group of answer choices theoretical lift and maximum lift are always equal. dependable lift and maximum lift are always equal. a total vacuum can be obtained using a fire department pumper. a total vacuum is impossible to create using fire service equipment.
Theoretical lift and maximum lift are always equal.
Theoretical lift and maximum lift are always equal because the maximum lift is determined by the theoretical lift. The theoretical lift is the maximum possible lift that a pump can generate. Maximum lift is the actual lift achieved by a pump.
Since the maximum lift is determined by the theoretical lift, they are always equal. A total vacuum is impossible to create using fire service equipment because there is always some atmospheric pressure present, which prevents a total vacuum from being achieved.
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a boy shoots a section-cup dart at a refrigerator where it sticks. if the suction cup has a diameter of 0.5 inches when stuck, what force in lbf is required to pull it straight off?
The force required to pull a suction cup off of a surface is determined by the adhesive strength of the suction cup and the surface it is attached to, as well as the size of the suction cup.
The larger the suction cup, the more force is required to remove it. In this case, with a suction cup diameter of 0.5 inches, the force required to pull it straight off of a refrigerator would likely be relatively small.
It's important to note that the suction cup is designed to stick to a smooth surface and the force required to pull the suction cup off is directly proportional to the area of the suction cup in contact with the surface.
The force required to pull the suction cup off can be calculated using the following formula: Force = (Adhesive strength of suction cup × Area of suction cup) / (Coefficient of friction between suction cup and surface).
In conclusion, the force required to pull the suction cup dart off the refrigerator depends on the adhesive strength of the suction cup, the size of the suction cup, and the coefficient of friction between the suction cup and the refrigerator surface.
Without the exact values of these parameters, it's difficult to give an exact value of the force required. But it's likely to be relatively small as the suction cup is small and it's designed to stick to a smooth surface.
Also, the force required will depend on how the boy has shot the dart and how it's adhered to the surface. In any case, the force required is not likely to be significant enough to cause damage to the refrigerator.
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HELP PLS ASAP
A stone is thrown horizontally from the top of a 18.4 m tall cliff. The stone lands
at a distance of 22.3 m from the edge of the cliff. What is the initial horizontal
velocity of the stone?
The stone is moving horizontally at a 1.211m/s starting velocity.
What is the initial horizontal velocity of the stone?From an 18.4 m tail cliff's peak, a stone is flung horizontally. In relation to the cliff's edge, the stone lands 22.3 metres away.
The starting horizontal velocity of the ball can also be determined by measuring the diameter d of the ball and dividing it by the time t it takes for it to cross the photogate. Voi = d/t, thus.
If time, acceleration, and ultimate velocity are known, the initial velocity is given by the equation u = v - at. (2) The equation u2 = v2 - 2 is applied as if the final velocity, acceleration, and distance are known. (3) In the case where a specific distance, acceleration, and time are specified, the initial velocity is.
Vo = d/t.
22.3 / 18.4 = 1.211.
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2. On the third day, the student sits 6 meters from the bell. What happens to the
intensity of the sound that she hears the third day compared with the first day? Recall
that the student sat 2 meters from the bell on the first day.
On the third day, the pupil is seated six meters away from the bell. the first day's student seat was 2 meters away from the bell . Sound intensity is expressed in decibels (dB).
What is meant by intensity of sound?Acoustic intensity, also referred to as sound intensity, is the amount of energy carried by sound waves per unit of area in a direction perpendicular to that area. The SI measure for intensity, which also covers sound intensity, is the watt per square meter (W/m2). Sound intensity is expressed in decibels (dB).
A 10 dB rise will result in an intensity that is 10 times larger since the scale of sound perception is logarithmic. For instance, a whisper is 1,000 times quieter than the sound of the waves at the seaside, which is a rise of 30 dB. The distance between a wave's resting position and its crest is known as its amplitude, whereas the sound intensity is defined as the sound power per unit area.
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A ball is dropped from rest from a height of 1. 88 m. How long does it take to strike the ground? (use g = 10 m/s2).
It takes 0.613 seconds for the ball to strike the ground after it is dropped from rest from a height of 1.88 m.
To determine how long it takes for a ball dropped from rest to strike the ground, we can use the equation:
t = √(2*d/g)
where t is the time it takes for the ball to strike the ground, d is the distance the ball falls, and g is the acceleration due to gravity.
Given that the ball is dropped from a height of 1.88 m, and that g = 10 m/s^2, we can substitute these values into the equation:
t = √(2*1.88 m/10 m/s^2)
t = √(0.376)
t = 0.613 s
Therefore, it takes 0.613 seconds for the ball to strike the ground after it is dropped from rest from a height of 1.88 m.
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after the brake pedal is pressed, the produces hydraulic pressure via two separate circuits to the brake lines?
The pedal ratio explains how the force actual to the brake pedal is multiplied and convey to the brake master cylinder.
It means some physics that includes the brake pedal length, the pushrod position, and involves of the master cylinder.
Brake hydraulics system is the central energy behind a brake system. Without hydraulics, no modern braking system could handle as advertised.
All bit within a brake system is complex including brake calipers, brake lines, brake pads, and brake rotors.
Specialist brake fluid is pulled from a pressure-driven master brake cylinder through brake lines to subordinate slave cylinders located at each brake housing.
Second, fluid is additionally pushed from the slave cylinder to individual brake calipers. These components house and operate internal pistons that finally drive brake pads against each brake rotor.
Hydraulics make your braking system constant. It makes it easy to gauge how much pressure you required to put on the brake pedal. It is also cost-effective.
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you are familiar with the principle of superposition as applied to the electric fields of a collection of point charges. we may apply this principle to extended charge distributions as well. for this problem, model each charged object as a collection of many individual charges, then use symmetry arguments in order to reason out your answer. for which configuration(s) does the total electric field vector at the origin have nonzero components in the x direction as well as the y direction (i.e., both x and y components are non-zero)?
The electric field vector at the origin will have non-zero x and y components if the charges are distributed in a non-symmetric manner around the origin.
The principle of superposition can be applied to the electric fields of a collection of point charges and extended charge distributions.
To answer this problem, we must model each charged object as a collection of many individual charges and then use symmetry arguments to determine the total electric field vector at the origin.
For the configurations where the total electric field vector at the origin has nonzero components in both the x and y directions, the charges must be distributed in a non-symmetric manner about the origin.
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Explain You pull open a door. If the force
the door exerts on you is equal to the
force you exert on the door, why do you
not move?
Explanation: the force of the door on your hand is not the same as just the force of your hand
evidence card 3: attracting magnets it was harder to pull the magnets apart when they were close together
What affects the amount if potential energy stored in the magnetic field when a magnet is moved against a magnetic force?
The amount of potential energy stored in the magnetic field when a magnet is moved against a magnetic force is affected by the distance through which the field is moved.
What is the potential energy stored in the magnetic field?
The potential energy stored in the magnetic field is defined as the amount of work done in rotating the dipole from zero potential energy position to any desired position.
Mathematically, the formula for the potential energy stored in the magnetic field is given as;
U = ( GM / R )
where;
G is the universal gravitation constantM is the massR is the distance of the magnetic field from the magnetic forceThus, the distance between the magnetic field and magnetic force affects the amount of energy stored in the magnetic field.
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During a person's commute to school, she spends 12 minutes driving 35 mph and 3 minutes stopped at red lights. What is the person's average speed during her commute?.
The person's average speed during the commute is 29.17 mph as calculated by total distance divided by total time.
Average Speed During Commute to SchoolThe person's average speed during the commute is 29.17 mph, calculated by dividing the total distance of 35 miles by the total time of 15 minutes. This average speed takes into account both the 12 minutes spent driving at 35 mph and the 3 minutes spent stopped at red lights. This calculation gives a more accurate representation of the person's overall speed during the commute, rather than just the speed they were driving when they weren't stopped.
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Ball #1 is rolling 99 m/s directly toward a 0.55 kg ball #2 at rest. During the collision, ball #1 stops and ball #2 is launched forward at 78 m/s. What is the mass of ball #1?
The mass of ball 1 is 0.43 kg.
What is the mass of ball 1?
The mass of ball 1 is calculated by applying the principle of conservation of linear momentum as shown below.
m₁u₁ + m₂u₂ = m₁v₁ + m₂v₂
where;
m₁ is the mass of ball 1m₂ is the mass of ball 2u₁ is the initial velocity of ball 1u₂ is the initial velocity of ball 2v₁ is the final velocity of ball 1v₂ is the final velocity of ball 299m₁ + 0.55 (0) = m₁(0) + 0.55 (78 )
99m₁ = 42.9
m₁ = 42.9 / 99
m₁ = 0.43 kg
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Which has a greater velocity? a ball rolling down a 3. 4m hill in 8. 5s or a fish swimming upstream, covering 6. 2m in 0. 6 minutes?.
The ball moving for 3.4m distance for 8.5 secs time has greater velocity than the fish moving for 6.2m distance for 36 secs time.
Kinematics is the branch of physics dealing with the motion of an object, without regard to the cause of this motion. It includes distance and displacement, speed and velocity, time, and acceleration. The same quantities are used in linear as well as angular or rotational motion.
We have two objects given to us, a ball and a fish. First, the ball, the displacement,d₁ the ball travels=3.4m, the time t₁ taken by the ball =8.5s.
Its velocity, v₁=d₁/t₁ , v₁=3.4m/8.5s, v₁=0.4m/s. Secondly, for the fish, the displacement that the fish travels, d₂ =6.2 m, the time taken by the fish,t₂ =0.6 minutes =0.6×60=36 seconds.
The time taken by the fish is converted from minutes to seconds, as 1 minute = 60 seconds. The velocity of the fish is v₂=d₂/t₂, v₂=6.2m/36s=0.172m/s.
So we can conclude that the ball has greater velocity(v₁=0.4m/s) than the fish ( v₂=0.172m/s).
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What is the change in entropy of the system when the flask of hexanes is boiled?
Need a refresher? Head over to action and review Thermodynamics
A. Negative
B. Zero
C. Positive
Positive change in entropy of the system when the flask of hexanes is boiled.
In this case, Option C is correct
What is thermodynamics?
Thermodynamics is the branch of physics that deals with the relationship between heat and other forms of energy. It studies how energy is converted into different forms, and how it affects matter and life. It also examines the laws which govern energy transfer and the resulting changes in matter. Thermodynamics is a key part of understanding many natural phenomena, such as the flow of heat through the Earth's atmosphere and oceans, and the behavior of stars and galaxies.When a flask of hexanes is boiled, the entropy of the system increases. This is because the boiling of the hexanes causes the molecules to become more disordered and spread out, increasing the number of microstates in the system. This is the opposite of what would happen if the flask were to be cooled, in which case the entropy of the system would decrease. Thus, the change in entropy of the system when the flask of hexanes is boiled is positive.To know more about thermodynamics click-
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Which type of acceleration should you use when accelerating on a short highway entry ramp.
The lowest level of acceleration is the best option when accelerating on a short highway entry ramp
Why use the lowest level of acceleration on a short highway entry way?When you are entry a highway ramps, you will have different speed with the traffic on the highway which is mean you have to determine whether you can join the traffic or not in the meantime. In order to make the best decision, you to slowdown so you can determine it carefully. This also can prevent accident happen to you because you can hit the brakes or dodge when unexpected event is happening.
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in terms of the mass of earth and the radius of earth, what is one possible combination of a mass and radius of this new planet?
One possible combination of the new planet's mass and radius, in terms of the mass of Earth and its radius, is three times Earth's mass and twice its radius.
The design of the rotating spacecraft described in the question utilizes the principle of centrifugal force to mimic the surface gravity of different planets. The outer ring, with a radius of 30 meters, is designed to mimic the surface gravity of Earth (approximately 9.80 m/s²). The inner ring, on the other hand, is designed to help the astronauts become accustomed to the surface gravity of a new planet (7.35 m/s²).
In order to achieve this, the new planet must have a mass that is 3 times that of Earth and a radius that is twice that of Earth. This is because centrifugal force is proportional to the mass of the object and the square of its radius, so a larger mass and larger radius would be required to create the desired surface gravity.
This question is incomplete and should be provided as:
The design for a rotating spacecraft below consists of two rings. The outer ring with a radius of 30 m holds the living quarters and mimics the surface gravity of Earth, approximately 9.80 m/s¬2. The inner ring is designed to help the astronauts become accustomed to the surface gravity of a new planet: 7.35 m/s2. In terms of the mass of earth and the radius of earth, what is one possible combination of a mass and radius of this new planet?Learn more about Earth mass here: brainly.com/question/25938309
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how long will it take a person on a skateboard to travel 45 m and attain a speed of 7 m/s from rest ?
It will take a person 6.42 second on a skateboard to travel 45 m and attain a speed of 7 m/s from rest .
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 of the ball is = (7 m/s)²/45 m = 1.09 m/s²
Hence, time taken to attain the speed = 7 m/s ÷ 1.09 m/s² = 6.42 second.
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what is the minimum hose diameter of an ideal vacuum cleaner that could lift a 15 kg dog off the floor?
The minimum hose diameter of an ideal vacuum cleaner that could lift a 15 kg dog off the floor is calculated to be 0.043 m.
Given that,
Mass of the dog = 15 kg
We know, F = m g
So, F = 15 × 9.8 = 147 N
Air pressure P = 1.013 × 10⁵ N/m²
We know, P = F/A
where, P is pressure
F is force
A is area
Let us find out A, by making A as subject,
A = F/P = 147/(1.013 × 10⁵) = 14.51 × 10⁻⁴ m²
To find the diameter of the hose, A = π d²/4
14.51 × 10⁻⁴ = π d²/4
4× 14.51 × 10⁻⁴ = π d²
d² = (4× 14.51 × 10⁻⁴)/π
d = √(18.49× 10⁻⁴) = 4.3 × 10⁻² m = 0.043 m
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A bullet is fired through a board 10 cm thick in such a way that the bullet's line of motion is perpendicular to the face of the board. If the initial speed of the bullet is 400 m/s and it emerges from the other side of the board with a speed of 300 m/s, what is the total time the bullet is in contact with the board? Label your answer. To write an exponent in your answer, please type it like this: 10^3.
The total time the bullet is in contact with the board is 8 x 10^-5 seconds
How to calculate?V1 = 400ms − the initial velocity of the bullet;
V2 = 300 ms− final velocity of the bullet;
d = 10cm = 0.1m − thickness of the board;
a − acceleration inside the board.
t − total time that the bullet is in contact with the board
To find the total time that the bullet is in contact with the board we can use formula :
t = V1 -V2 / a
where a has been found to be 1.25 x 10^6 m/s²
Substituting the values, we have that total time that the bullet is in contact with the board = 8 x 10^-5 seconds
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If an object is tossed up vertically, when in its flight before it hits the ground is its velocity zero? Explain why this is true.
The velocity before the object hits the ground is not zero due to acceleration due to gravity.
What is the velocity of the object?We know that the object that is thrown up would experience the force of gravity that acts on it. As the object is moving up, there is a decceleration due to gravity that acts on the object and the velocity of the object would eventually get to zero at the maximum height.
When the object is coming down, the object would be accelerated due to gravity such that the velocity of the object would begin to increase again and it would hit a maximum when the object falls to the ground.
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