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which statements describe kinetic and potential energy? check all that apply.

ANSWER:

(a) 108 J

(b) 0 J

(c) 108 J

STEP-BY-STEP EXPLANATION:

(a)

Express the relation between horizontal component of work done and force on the crate:

Here Wh is the horizontal component of the work done on the crate and Fh is the horizontal component of force and d is the distance of the crate across the floor.

Replacing:

(b)

Express the relation between vertical component of work done and force on the crate:

Here Wv is the vertical component of the work done on the crate and Fv is the vertical component of force and d is the distance of the crate across the floor.

Replacing:

(c)

Express the relation for total work done by the 45 N force:

The de Broglie wavelength for a proton moving with a speed of 1.0 x 10⁶ m/s is approximately 6.63 x 10⁻⁹ meters.

The de Broglie wavelength (λ) of a particle is given by the equation:

λ = h / p

Where:

λ is the de Broglie wavelength

h is the Planck's constant (approximately 6.63 x 10⁻³⁴ joule-seconds)

p is the momentum of the particle

The momentum of a particle is given by:

p = mv

Where:

m is the mass of the particle

v is the velocity of the particle

In this case, we are dealing with a proton. The mass of a proton (m) is approximately 1.67 x 10⁻²⁷ kilograms.

Given the speed of the proton (v) as 1.0 x 10⁶ m/s, we can calculate the momentum (p):

p = mv = (1.67 x 10⁻²⁷ kg) x (1.0 x 10⁶ m/s) = 1.67 x 10⁻²¹ kg·m/s

Now, we can calculate the de Broglie wavelength (λ):

λ = h / p = (6.63 x 10⁻³⁴ J·s) / (1.67 x 10⁻²¹ kg·m/s) ≈ 6.63 x 10⁻⁹ meters.

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Answer:

Force is in lbs and distance is in ft.

W = F * d = ft-lbs       units of work

(Note - torque = F * R   normally torque is specified in "lbs-ft" to distinguish work from torque)

Answer:24/225

Explanation:density =mass/volume

Answer:

Option D

Last option

GOOD LUCK FOR THE FUTURE! :)

Answer:

hello your question is incomplete below is the complete question

Devon has several toy car bodies and motors. The motors have the same mass, but they provide different amounts of force, as shown in the table.

Which motor and body should Devon use to build the car with the greatest acceleration?

motor 1, with body 1

motor 1, with body 2

motor 2, with body 1

motor 2, with body 2

answer: Motor 2 body 1

Explanation:

F = ma

hence a ( acceleration ) = F / m

force of motor 2 = 15 N since the mass of the motor is the same and that of the bodies aren't given

The motor and body that would produce the greatest acceleration would be : Motor 2 Body 1  if the mass of Body 1 is less than the mass of Body 2

Answer:

c

Explanation:

The total charge on the surface of the cavity would be -4nc, which is induced by the point charge.

According to the induction properties of charge, a charge can induce opposite charge to the nearby area.

also all the charge of the outer would be present on the sphere, so the effect of the charge -6c at the center would be zero.

All the charges are speeded on the metal surface and inner part is not having charge. Therefore point charge will not be affected by the outer charge and it will work independently with respect to -6c  charge.

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Visualizing the body in the anatomical position is significant because all observers have a common point of reference when describing and discussing its region.

As the description itself says, visualizing the body in its anatomical location is important because it provides a single point of reference for all observers when describing and discussing its region.

Therefore, visualizing the body in the anatomical position is significant because all observers have a common point of reference when describing and discussing its region.

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The question you are looking for is given here:

Visualizing the body in the _____________ is significant because all observers have a common point of reference when describing and discussing its region.

The tip of the turbine fan blade is moving at approximately 540 meters per second.

The tip of the turbine fan blade in a turbojet engine is moving at a considerable speed. To determine its velocity, we need to consider both the linear and rotational aspects of its motion.

First, let's calculate the linear velocity. The diameter of the turbine fan blade is given as 1.8 meters, which means the radius is half of that, or 0.9 meters. The linear velocity can be determined by multiplying the radius by the rotational velocity.

In this case, the blade rotates at 300 revolutions per second, so the linear velocity is 0.9 meters (radius) multiplied by 300 revolutions per second, resulting in 270 meters per second.

Next, to find the velocity of the blade tip, we need to consider the circumference of the circle traced by the blade tip during each revolution.

The circumference is given by 2π times the radius, which in this case is 2π multiplied by 0.9 meters, equal to approximately 5.65 meters. Multiplying this value by the rotational velocity of 300 revolutions per second gives us a tip velocity of approximately 1695 meters per second.

Therefore, the tip of the turbine fan blade in a turbojet engine is moving at approximately 540 meters per second, considering both its linear and rotational velocities.

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The position of the person from the mirror is d = 2.10 m. When you stand in front of a flat mirror and focus a camera on your image, the camera will focus at twice the distance between you and the mirror.

This is because the image formed by a flat mirror is virtual and appears to be located behind the mirror at the same distance as the object in front of the mirror.

The distance between you and the mirror is d.

The distance between you and your image is d.

The distance between the camera and your image is 4.20 m.

d = d

d + d = 4.20 m

2d = 4.20 m

d = 2.10 m

Hence, the position of the person in the mirror is

d = 2.10 m

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The proof of third equation of motion is determined as  v² = 2as + u².

The proof of third equation of motion is determined as follows;

The first equation is given as;

v = u + at

t = ( v - u ) /a

where;

The formula for the average distance traveled by an object is;

s = (v + u)/2  x  t

Expand the equation above as;

s = (v + u)/2 x  (v - u)/a

s = (v² - u²) / 2a

2as = v² - u²

v² = 2as + u², proved

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The inductance L has a value of about 1.85 millihenries.

We can use the relationship between current and voltage in an inductor to solve for the inductance L. The peak current (I_peak) and rms voltage (V_rms) are related to the inductance L and the frequency of the oscillator (f) by the following equation:

I_peak = (V_rms / L) * 2πf

Rearranging the equation, we get:

L = (V_rms / I_peak) * (1 / 2πf)

Substituting the given values, we get:

L = (6.2 V / 0.069 A) * (1 / (2π * 16 kHz))

Simplifying the expression, we get:

L = 1.85 mH

Therefore, the value of the inductance L is approximately 1.85 millihenries.

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If the velocity-time graph is horizontal, the acceleration is zero because the slope will be zero.

Answer: 50.2 m/s towars northeast, also travels at 5.71 degrees.

Explanation:

(50.0 m/s)^2 +(5.0 m/s)^2 =c^2

c= \(\sqrt[n]{2500 m^2/s^2 +25.0 m^2/s^2}\)

Answer:

40sec

Explanation:

Data

Work = 440 J

Power= 11watt

time = ?

Power = work done/time

===> time = work done/power

= 440/11

= 40sec

Answer:

I=V/R is the formula for ohm's law .

Explanation:  I=V/R is the formula for ohm's law

Answer:

I= V/R

Explanation:

The equation, i = v/r, tells us that the current, i, flowing through a circuit is directly proportional to the voltage, v, and inversely proportional to the resistance, r. (Study.com)

The statement illustrates how engineering has influenced society in that People want the cameras in their cell phones to be able to capture high-resolution images. Option C is corect.

A digital camera that creates pictures that can be saved on a computer and seen on a screen.

People want their mobile phone cameras to be able to take high-resolution pictures, which shows how engineering has affected society.

Statement B illustrates how engineering has influenced society.

Hence option C is correct.

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Answer:

x = x0 + v0 t + 1/2 a t^2

The question asks for distance traveled in 1 sec

x0 = 0

v0 = 0

This leaves

x = 1/2 a t^2

x = 1/2 * 9.8 /s^2 * 1 s^2 = 4.9 m

The balloon will fall 4.9 m in the first second.

The degree mass of many different spiral galaxies close by after which takes a median. They add up all the observations at 21-cm wavelengths because the mass of hydrogen gas is some distance greater than the mass in all of the stars.

Astronomers have four simple techniques to degree the hundreds of galaxies and clusters: rotation curves, random velocities, X-ray emission, and gravitational lensing. Rotation curves: In astronomy, we often infer loads from orbits.

Because it's impossible to weigh a galaxy virtually by way of searching at it tons less when the observer occurs to be inner of it, as is the case with our Milky way researchers deduce a galaxy's mass by means of analyzing the motions of celestial gadgets as they dance across the host galaxy, led by using its gravitational pull.

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Answer:

The nail is driven into the wood so that it would hold into the wood because if the wood was driven to the nail it may not stay and it would take way to much effort.

Explanation:

Answer:

She will travel 180 kilometers.

Explanation:

You take the time and multiply it by your distance, and you get your total distance.

d = v.t

d = 60 km/h x 3 h

d = 180 km

To answer your question, we can use the formula for acceleration:

v = u + at

Where:
v = final velocity
u = initial velocity
a = acceleration
t = time

Given that the cart has a constant acceleration of 2m/s^2, we can use this value for "a" in the formula.

At a certain instant, the speed of the cart is 5m/s. This means that we can use this value for "u" in the formula.

To find the speed of the cart 2 seconds later, we can substitute the values into the formula:

v = u + at
v = 5 + (2)(2)
v = 9m/s

Therefore, the speed of the cart 2 seconds later is 9m/s.

To find the speed of the cart 2 seconds earlier, we can use the same formula, but this time we need to subtract 2 seconds from the time:

v = u + at
v = 5 - (2)(2)
v = 1m/s

Therefore, the speed of the cart 2 seconds earlier is 1m/s.

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Answer:

The theory is supported by all the available observations and data.

Explanation: The scientific community will accept a theory when a sufficient body of evidence supports it. This includes experiments that refute other potential theories. Experiments should also be carried out that attempt to disprove the theory but cannot.

It should not matter who proposed the theory or who supports it, and instead should entirely be based on the quality and abundance of data supporting it.

Hope this helps!

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Any specific theory is accepted by research experiments, observations, and data supporting the theory.

So a proposed scientific theory is acceptable only by cross-examinations performed on it through research and experiments, and evident observations.

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Answer:

A.  A fuse must be replaced after use, but a circuit breaker can be

reset.

Explanation:

A fuse works by actually melting, so there is physical damage that interrupts conduction of current due to lack of conductive material.

The circuit breaker is a switch operated automatically when there is excess flow of current. It interrupts that way the flow of current, but can simply get reset (back to its original close position) once the problem that caused the overflow of current in the circuit is found.

This better agrees with answer A in the list of possible choices.

The place that Jupitar exerts the greatest tidal forces on, is the moon named, Io.

Using the Earth as an example, the Moon is pulled by the Earth's gravity, while the Earth is drawn back to the Moon by the Moon's gravity. That indicates that the Moon exerts tidal forces that, if unchecked, would squeeze the Earth in the direction of the Moon and break it apart. Gravity on Earth itself stops that from happening.

This means that the closer the moon is to the Earth, the greater the tidal forces that would be exerted. By this logic, the moon that Jupitar would exert the greatest tidal forces on, would be the moon that is closest to it. This moon is called Io. As the innermost moon to Jupitar, Io gets tidal forces that are said to be 20, 000 times stronger than the tidal forces on Earth.

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If the bolt on your car engine needs to be tightened to a torque of τ, you can use a long wrench to produce the required torque.

A torque is a measure of the twisting force applied to an object. It's typically represented by the symbol τ, and it's measured in units of Newton meters (Nm) in the metric system. If a bolt on the car engine needs to be tightened to a torque of τ, you'll need to apply a specific amount of force to ensure that it's properly tightened. A long wrench can be used to increase the torque produced by the force applied to the bolt.
The force applied at the end of the wrench will be amplified at the bolt due to the distance between the end of the wrench and the bolt. To calculate the force you should apply to the end of the wrench, you can use the equation τ = Fd, where τ is the torque you need to produce, F is the force you need to apply at the end of the wrench, and d is the distance between the bolt and the end of the wrench.
To determine the force needed to produce a given torque, you can rearrange the equation to get F = τ/d. So, the force you should apply will depend on the distance between the bolt and the end of the wrench. The longer the wrench, the less force you'll need to apply to produce the required torque. However, you may also need to consider the maximum torque that can be produced by the wrench itself.
A wrench with a higher torque capacity will allow you to tighten the bolt more securely without breaking the wrench. You can use the equation F = τ/d to calculate the force needed to produce a given torque. It's essential to use a wrench with sufficient torque capacity to avoid breaking the wrench or damaging the bolt.

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Answer: f=20 (i think)

Explanation:

all I did was divide 300 and 15.

300/15= 20

According to the question, the acceleration of the speedboat relative to the shore is found to be 11.2 \(m/sec^2.\)

Acceleration may be characterized as the rate of change of the velocity of an object with respect to time. It is a vector quantity, as it defined both magnitude and direction. This allows you to measure how fast velocity changes in meters per second squared (m/s^2).

According to the question,

The initial velocity of the boat = 18.5 m/s.

The final velocity of the boat = 46.5 m/s.

Difference in velocity = Final velocity - Initial velocity = 46.5-18.5 = 28 m/s.

The formula for calculating the acceleration of the boat is as follows:

           = 28/2.50 = 11.2 \(m/sec^2\).

Therefore,  the acceleration of the speedboat relative to the shore is found to be 11.2 \(m/sec^2.\)

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The amount of gravitational force that acts on a space vehicle while in earth orbit is almost zero but not absolute zero.

There is no ground force or opposing natural force to gravity.

Because the earth is not a perfect sphere, the value of "g" is lowest at the equator. At the equator, its radius is at its largest. Thus, the equator is the location where g will be smallest according to the equation

g = GM/R2.

All items in the planet's gravitational field will be lost in space if gravity abruptly vanishes. We would experience levity. Essentially, if gravity is equal to zero, then there will be no acceleration caused by gravity.

Astronauts can float within their spaceship or outside during a spacewalk in microgravity. Moving heavy stuff is simple. Astronauts, for instance, can merely use their fingertips to manipulate machinery weighing hundreds of pounds.

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