find the energy in joules of photons of radio waves that leave an fm station that has a 90.0-mhz broadcast frequency.

The time for the ball to reach the final velocity is 3 seconds.

The time for the ball to reach the final velocity is calculated by applying first kinematic equation as shown below.

v = u + gt

where;

The time for the ball to reach the final velocity is calculated as;

v = 0 + gt

v = gt

t = v / g

t = ( 29.4 m/s ) / ( 9.8 m/s² )

t = 3 seconds

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In this scenario, we have two point charges, 4.00 uc and 2.00 uc, placed at opposite corners of a rectangle.

The potential difference between these two charges can be calculated using the formula V = (kQ/r1) - (kQ/r2), where V is the potential difference, k is Coulomb's constant, Q is the magnitude of the charge, and r1 and r2 are the distances from each charge to a reference point.

In this case, we can choose the reference point to be the midpoint of the diagonal connecting the two charges. Using this reference point, the distances from the 4.00 uc charge to the midpoint and from the 2.00 uc charge to the midpoint are equal, and can be calculated using the Pythagorean theorem as sqrt(2^2 + 2^2) = 2sqrt(2).

Substituting these values into the formula, we get V = (9 x 10^9 Nm^2/C^2)(4.00 x 10^-6 C)/(2sqrt(2)m) - (9 x 10^9 Nm^2/C^2)(2.00 x 10^-6 C)/(2sqrt(2)m) = 1.47 V.

This means that if a test charge were placed between these two point charges, it would experience a potential difference of 1.47 V. This potential difference is a measure of the energy difference between the two points and is an important concept in understanding electric fields and circuits.

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Answer:

Explanation:

The acceleration of an object given it's mass and the force acting on it can be found by using the formula

\(a = \frac{f}{m} \\ \)

m is the mass

f is the force

From the question we have

\(a = \frac{70}{7} = 10 \\ \)

We have the final answer as

Hope this helps you

Answer:

Thermal energy and Mechanical

Explanation:

Pressure is a measure of force per unit area:

P = F/A

The water exerts a pressure of 202 kPa = 202,000 Pa on the diver, who has a surface area of 1.50 m². Then the force exerted by the water is F such that

F = PA

F = (202,000 Pa) (1.50 m²)

F = 303,000 N = 303 kN

Answer:

C voltage

Explanation:

Voltage is the change in electric potential so basically current flows from high potential to low potential due to voltage.

Answer:

I believe its B...."Carbon Content and Heat Value"

Explanation:

Coal is classified into four main types, or ranks: anthracite, bituminous, subbituminous, and lignite. The ranking depends on the types and amounts of carbon the coal contains and on the amount of heat energy the coal can produce.

If a person pushed on the door to the left of the handle, they would need to use less force than if they used the handle.

The reason for this is that the handle provides a mechanical advantage over pushing directly on the door. When the handle is used, the force applied to it is multiplied by the mechanical advantage, which is the ratio of the distance through which the handle moves to the distance through which the door moves.

For example, if the handle moves the door a distance of 2 cm and the door moves a distance of 5 cm when pushed directly on it, the mechanical advantage is 2:5, or 0.4. This means that for every 0.4 units of force applied to the handle, the door moves 1 unit.

On the other hand, if the person pushed directly on the door, the force applied to it would be the same as the force applied to the door, without any mechanical advantage. In this case, the door would move 5 cm, not 2 cm, for every unit of force applied to it.

Therefore, the person would need to use more force if they pushed directly on the door than if they used the handle, because they would have to apply the same amount of force over a greater distance to move the door the same distance.  

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Answer:

I think c is the answer but I have a little concern on d too

The linear speed of an object on a merry-go-round depends on the distance of the object from the center of rotation. The linear speed is the distance traveled by the object in a given time, which is equal to the circumference of the circle it travels divided by the time. Since the circumference of a circle increases with the radius, an object farther from the center travels a greater distance in the same amount of time and, therefore, has a greater linear speed.

Therefore, the object at the greatest distance from the center of the merry-go-round will have the greatest linear speed. In this case, option A, 3 meters from the center, would have the greatest linear speed since it has the greatest distance from the center. On the other hand, the object at the center of the merry-go-round will have zero linear speed since it does not travel around the circle.

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Answer:

PFA

:-)

Explanation:

It is true because The equation v = λf relates the speed of a wave (v) to its wavelength (λ) and frequency (f). It tells us that the speed of a wave is equal to its wavelength multiplied by its frequency.

In other words, the shorter the wavelength of a wave, the higher its frequency must be in order to maintain a constant speed. This is because the product of wavelength and frequency must remain constant for a given wave type, such as light or sound.

For example, in the case of light waves, shorter wavelengths correspond to higher frequencies and higher energy photons. This is why blue light, which has a shorter wavelength than red light, has a higher frequency and is more energetic.

Similarly, for sound waves, shorter wavelengths correspond to higher frequencies and higher-pitched sounds. This is why a high-pitched whistle produces sound waves with shorter wavelengths than a low-pitched bass note.

So, in summary, the speed of a wave does depend on its wavelength, as described by the equation v = λf.

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Answer:

The frictional force on the block is 118 N.

Explanation:

Given;

horizontal force applied on the block, f = 80 N

mass of the block, m = 20.0 kg

coefficient of friction, μ = 0.6

The frictional force on the block is calculated as;

F = μR

F = μ(mg)

F = 0.6(20 x 9.81)

F = 117.7 N

F = 118 N.

Therefore, the frictional force on the block is 118 N.

Step 1

Diagram and free body diagram

F.B.D

Step 2

Newton's second law states a force applied to an object at rest causes it to accelerate in the direction of the force

hence, for the x -axis ( axis of the motion) we have

so,the answer is

I hope this helps you

The mechanical advantage of the screwdriver is 0.208.

Mechanical advantage is the ratio of the output force produced by a machine (especially a simple machine) to the applied input force.

The efficiency of a simple machine is determined by calculating their mechanical advantage (MA). Mechanical advantage is a measure of the force amplification attained by the machine.

According to this question, the screwdriver has a radius from the center to the outermost edge of the tip of 50.0 mm, and the radius of the handle of 240 mm. The mechanical advantage can be calculated as follows:

M.A = 50/240

M.A = 0.208

Therefore, 0.208 is the mechanical advantage of the simple machine.

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The index of refraction of the plastic is  1.36.

The index of refraction (n) of a medium is defined as the ratio of the speed of light in a vacuum (c) to the speed of light in the medium (v):

n = c/v

In this problem, the speed of light in the plastic (v) is given as 2.199 x \(10^8\)m/s. The speed of light in a vacuum (c) is a constant and is equal to 3 x \(10^8 m/s.\)

Plugging these values into the formula for index of refraction, we get:

n = c/v = (3 x \(10^8 m/s\)) / (2.199 x \(10^8 m/s\)) ≈ 1.36

Therefore, the index of refraction of the plastic is approximately 1.36.

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There are different types of square guides that can be used, including T-square guides and miter guides.

When using a portable circular saw, it is recommended to use a square guide. A square guide can be used to ensure that the cut is straight and accurate, which is important when working with wood or other materials. A square guide is a tool that is used to guide the saw blade in a straight line, and it can be used to make cuts at a variety of angles.

There are different types of square guides that can be used with a portable circular saw. One type is a T-square guide, which consists of a long, straight edge that is attached to a T-shaped handle. The handle is used to guide the saw blade along the edge of the material being cut, ensuring that the cut is straight and accurate.

Another type of square guide is a miter guide, which is used to make cuts at a specific angle. A miter guide consists of a piece of metal or plastic that is attached to the saw and can be adjusted to the desired angle. This type of guide is useful when making cuts for frames, molding, or other angled cuts.

In conclusion, a square guide is an essential tool when using a portable circular saw. It helps to ensure that the cut is straight and accurate, which is important when working with wood or other materials. There are different types of square guides that can be used, including T-square guides and miter guides.

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The impulse applied to the driver by the seatbelt, assuming he follows the same motion as the car is 1890 N sec.

In order to change the momentum of an object, you must exert a certain amount of force over a specific period of time. For example, when you hit a ball with a cricket bat, you apply a force for a time to cause a change of momentum in the ball.

A resultant force causes an acceleration and a change in the velocity of a body as long as the body is acting on it. Therefore, a net force applied over a long period of time produces a larger change in linear momentum than the same force applied for a short period of time.

Impulse is often stated to be the product of the mass and velocity of the object. The equation for impulse is given as,

J = m* v = 70* 27 = 1890 N sec

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Answer:

20.22 m

Explanation:

Bullet mass = .05 kg

Initial Kinetic Energy = 1/2 m v^2 =  1/2 (.05)(95^2 ) = 225.625 j

The work of friction must equal this KE

Normal force will be the wooden block PLUS the bullet times  g

 =  4.55 * 9.81

  force of friction is normal force * coefficient of friction

    =  4.55 * 9.81 * .250 N

  work of friction will be the force of friction x distance

 225.625  J  =  (4.55)(9.81)(.250) * d

   d = 20.22 m

Answer: A

Explanation:

The radius of the second sphere is approximately 11.95 cm. This can be calculated by the volume of sphere.

The mass is proportional to the volume of the spheres. The volume of a sphere is given by the formula:

V = (4/3)πr³

Let the radius of the first sphere be r₁ (4.45 cm) and the radius of the second sphere be r₂. Given that the mass of the second sphere is six times greater than the first sphere, we can write:

M2 = 6 × M1

Since mass is proportional to volume, we can also say: V2 = 6 × V1

Now, substitute the volume formula for both spheres: (4/3)πr₂³ = 6×(4/3)πr₁³

Divide both sides by (4/3)π to simplify: r₂³ = 6 × r₁³

Plug in the value of r₁ (4.45 cm): r₂³ = 6 × (4.45)³

Now, calculate the value of r₂³: r₂³ ≈ 1683.107

Take the cube root of both sides to find r₂: r₂ ≈ (1683.107)^(1/3) r₂ ≈ 11.95 cm.

So, the radius of the second sphere is approximately 11.95 cm.

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The bus will go 2.788×10^14 meters far if the special detector placed on one of the bus's tires counts the number of rotations completed by the tire during the journey.

What is a circle?

It is described as a set of points, where each point is at the same distance from a fixed point called it's center.

wr are going on a field trip in a school bus. A special detector placed on one of the bus's tires counts the number of rotations completed by the tire during the journey.

It is given that diameter (D) of the tyre = 111 meters

circumference of the tyre = πD

circumference of the tyre = 3.14 × 111

= 348.5 m

In 800080008000 rotations, total distance covered = 348.5 × 800080008000 = 2.788×10^14

Thus, the bus will go 2.788×10^14 meters far if the special detector placed on one of the bus's tires counts the number of rotations completed by the tire during the journey.

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After the collision, the two cars stick together. Find the final velocity of the two cars would be 0.667 meters per second as per the conservation of the momentum after the collision.

It is the type of collision in which the total momentum as well as the kinetic energy on the system is conserved.

As given in the problem we have to find the velocity of the two cars if, after the collision, the two cars stick together,

As per the conservation of the momentum,

The total initial momentum of the cars before the collision = The total final momentum of the cars after the collision

1 × 2 + 2 × 0  = ( 1 + 2 ) × V

2 + 0 = 3 × V

V = 2 / 3

V = 0.667 meters per second

Thus, after the collision, the two cars stick together, then the final velocity of the two cars would be 0.667 meters per second

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A. True. The temperature of a body is indeed a measure of the average kinetic energy of the molecules of that body.

The temperature of a body is related to the random motion of its constituent particles, such as atoms or molecules. The greater the kinetic energy of the particles, the higher the temperature of the body. Temperature is measured using a thermometer, which works by detecting the expansion or contraction of a material in response to changes in temperature. This expansion or contraction is caused by the kinetic energy of the particles in the material, which increases or decreases as the temperature changes. The relationship between temperature and kinetic energy is a fundamental concept in thermodynamics, and is used to describe many physical phenomena, such as heat transfer, phase transitions, and chemical reactions. Therefore, it is important to understand that temperature is indeed a measure of the average kinetic energy of the molecules of a body.

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Answer:

(1) a) S=D/T

b)5m/s

c)3.33s

(2) a) 1.104m

Explanation:

(1) b) S=D/T

 S=1500/300

 S=5m/s

c) T= V-U/a

 v=10

 u= 2

 a= 2.4

10-2=8/2.4=3.33s

(2) a) d=s×t

 0.46×2.4=1.104m



Option A i.e. Uranus is the only planet in the solar system whose axis of rotation lies close to the plane of the solar system.

The correct answer is a. Uranus. Uranus is the only planet in the solar system whose axis of rotation is tilted at an angle of almost 98 degrees relative to the plane of the solar system. This means that Uranus essentially rolls around the sun on its side, while the other planets rotate more or less upright.  This is in contrast to the other planets in the solar system, whose axes of rotation are more or less perpendicular to the plane of the solar system.

Hence, the correct answer is option A i.e. Uranus.

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Answer: Comparing infrared and ultraviolet, ''we can say that infrared has longer wavelength and lower photon energy''

At the time when infrared and ultraviolet is compared so it has longer wavelength and lower photon energy.

It should be lie between the visible and microwave portions of the electromagnetic spectrum. Infrared waves contain wavelengths more than than ultraviolet radiation. And the frequency of Infrared radiation should be lower as compared to the ultraviolet radiation. Also, the photon energy of the light should be proportional to the wave frequency.

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Answer:

The Answer is C. The force of gravity

Explanation:

This is because it is the force of gravity exerted or inflicted upon the object or organism. With more gravity inflicting upon an object the heavier it feels. In fact, weight and gravity have such a close relationship that the equation for weight is F = M x A where F represents the objects weight in Newtons, M equals it's mass, and A represents the downward acceleration due to the gravity.

Answer:

The answer is c

Explanation: