the tires on a car have a radius of 31 cmcm. part a what is the angular speed of these tires when the car is driven at 14 m/sm/s ?

The total work done by the father in pulling the sled is 69.3 J.

Mass is a measure of the amount of matter contained in an object. It can be measured using scales, balances or other measuring instruments. Mass is a fundamental property of all matter, and its measurement is the basis for many scientific and engineering calculations. Mass is not the same as weight, which is a measure of the force exerted by gravity on an object. Mass is often expressed in units such as kilograms or grams.


To calculate the amount of work done by the father, we must first calculate the force of friction that acts between the sled runners and the snow. This is equal to the coefficient of kinetic friction, multiplied by the total mass of the sled and the girl, multiplied by the acceleration due to gravity (9.8 m/s2):

Friction force = 0.20 x 35 kg x 9.8 m/s2 = 6.93 N

Next, we must calculate the total work done by the father in pulling the sled. This is equal to the force of friction multiplied by the distance traveled:

Work done = 6.93 N x 10 m = 69.3 J

Therefore, the total work done by the father in pulling the sled is 69.3 J.

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Answer:

v=28.28m/s t=14.14s average velocity =2m/s

Explanation:

Starting at rest the initial velocity is 0 substituting that in the first equation of motion v=u+atgives the final velocity but we first have to determine the time using the third equation of motion which is s=ut+1/2at^2 and then do the substitution. Average velocity is the determined by adding the initial and final velocity then divide it by 2

Answer:

10:30am ........................

Answer:

maybe around 10:30 I would say

Approximately 962,920,000 joules in a candy bar containing 230,000 calories.

It is important to understand that joules and calories are both units of energy measurement. However, joules are the SI unit of energy, while calories are commonly used in nutrition. One calorie is equivalent to 4.184 joules.
To convert calories to joules, we can multiply the calorie value by 4.184.
Multiply the given calories by the conversion factor
In this case, 230,000 calories multiplied by 4.184 gives us 962,920,000 joules.

In summary, a candy bar containing 230,000 calories has approximately 962,920,000 joules of energy.

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The time for a steel ball to hit the ground when shot horizontally off a table is independent of the initial velocity, and the formula is \(d = v_i*t + (1/2)at^2\).

To decide the time it takes for a steel ball to stir things up around town when shot evenly off a table, we can utilize the conditions of movement, explicitly the kinematic condition:

\(d = v_i*t + (1/2)at^2\)

where:

d is the distance voyaged

v_i is the underlying speed

an is the speed increase

t is the time

We can expect that the speed increase is because of gravity, which is steady and equivalent to \(9.81 m/s^2.\)

Since the ball is shot on a level plane, its underlying vertical speed is zero. Accordingly, we can work on the situation to:

\(d = (1/2)at^2\)

Settling for t, we get:

t = sqrt(2*d/a)

To decide the distance voyaged, we can utilize the way that the ball will follow an explanatory direction and will stir things up around town simultaneously it would have taken to fall upward from a similar level. Hence, we can involve the condition for the time it takes for an item to in an upward direction fall:

t = sqrt(2*h/g)

where h is the level of the table and g is the speed increase because of gravity.

Utilizing the trial information, we can decide the level of the table and the distance the ball goes prior to stirring things up around town for every speed setting of the launcher. Then, we can work out the time it takes for the ball to stir things up around town involving the condition for t.

The time it takes for the ball to stir things up around town will be the equivalent no matter what the speed setting of the launcher, as long as the ball is shot evenly with a similar starting level. This is on the grounds that the underlying speed in the level bearing doesn't influence the time it takes for the ball to upward fall.

This outcome is steady with the way that the time it takes for an item to fall upward just relies upon the level and speed increase because of gravity. Hence, failing upward from the table top to the floor beneath would bring about a similar time it takes for the ball to raise a ruckus around town when shot evenly off the table.

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The complete question is:

If the steel ball is shot horizontally off the table, how much time would it take the ball to hit the ground for each of the velocity settings of the launcher? Explain your answer using the equations of motion and your experimental data. How does this relate to the ball being dropped vertically from the table top to the floor below.

Answer:

Grow

Explanation:

If an organism is reproducing quickly, the population will grow faster

Answer:

1 : 2 (30 : 60)

Explanation:

The rate of increase of the Earth's gravity field at latitudes 30° and 60° are in the ratio 1 : 2 because 30 : 60 simplified is 1 : 2.

If the answer does not ask for the ratio to be simplified leave its as 30 : 60.

(A) The average velocity for x changing from 3 to 9 seconds is 13 meters per second. (B) The average velocity for x changing from 5 to 5+h seconds is 10h + 5 meters per second. (C) The instantaneous velocity at x=5 seconds is 25 meters per second.

(A) To find the average velocity, we need to calculate the change in y divided by the change in x. In this case, y = x^2 + 5x. Evaluating y at x = 3 and x = 9, we have y(3) = 36 and y(9) = 126. The change in y is 126 - 36 = 90. The change in x is 9 - 3 = 6. Therefore, the average velocity is 90/6 = 15 meters per second.

(B) The average velocity for x changing from 5 to 5+h seconds can be found by evaluating the function y = x^2 + 5x at x = 5 and x = 5+h, and then calculating the change in y divided by the change in x. Substituting these values, we have y(5) = 50 and y(5+h) = (5+h)^2 + 5(5+h). Simplifying, we get y(5+h) = h^2 + 15h + 50. The change in y is h^2 + 15h, and the change in x is h. Therefore, the average velocity is (h^2 + 15h)/h = h + 15 meters per second.

(C) To find the instantaneous velocity at x=5 seconds, we take the derivative of the function y = x^2 + 5x with respect to x. The derivative is dy/dx = 2x + 5. Evaluating this derivative at x = 5, we get dy/dx(5) = 2(5) + 5 = 15. Therefore, the instantaneous velocity at x=5 seconds is 15 meters per second.

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Explanation:

they are called derived quantities. which includes:

pressure, stress, work, acceleration, velocity,density,force

In order to have a planet that has a force of gravity similar to that of the earth, the space ship must land in Borros whose radius is half of the earth's radius and has one - fourth of the earth's mass.

The force of gravity is obtained from;

F = Gm1m2/r^2 It is an example of an inverse square law.

For another planet, Borros, the radius is half of that of the earth and the mass is one - fourth of that of the earth, hence;

F = 1/4Gm1m2/(r/2)^2

F = 1/4Gm1m2/r^2/4

F = Gm1m2/r^2

Therefore, the planet that is most similar to the earth is Borros because,  the gravity would be stronger , but since it is only one fourth the mass , the changes balance out and the gravity will be the same as on Earth.

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1) The number of photons in each beam is what determines the amount of energy each beam carries. A beam of red light contains more photons than a beam of blue light, but each photon in the blue beam carries more energy than each photon in the red beam. Therefore, the two beams can carry the same amount of energy despite having different energies per photon.

2) Reflecting telescopes have two advantages over refractors. They are cheaper to manufacture, and they do not suffer from chromatic aberration.

3) Refraction is the bending of light as it passes from one medium to another. Refraction occurs because light waves travel at different speeds through different materials. The amount of refraction depends on the angle at which the light passes through the medium.

4) The image of a star is larger in the focal plane of the larger telescope. This is because the larger telescope collects more light than the smaller telescope, which means that the image is brighter and has a higher signal-to-noise ratio.

5) Quantum efficiency is a measure of how efficiently a detector converts incoming photons into electrical signals. A higher quantum efficiency means that more of the incoming

photons are detected, which makes it easier to detect faint astronomical objects.

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1) The number of photons in each beam is what determines the amount of energy each beam carries.

2) Reflecting telescopes have two advantages over refractors.

3) Refraction is the bending of light as it passes from one medium to another.

4) The image of a star is larger in the focal plane of the larger telescope.

5) Quantum efficiency is a measure of how efficiently a detector converts incoming photons into electrical signals.

1) The number of photons in each beam is what determines the amount of energy each beam carries. A beam of red light contains more photons than a beam of blue light, but each photon in the blue beam carries more energy than each photon in the red beam. Therefore, the two beams can carry the same amount of energy despite having different energies per photon.

2) Reflecting telescopes have two advantages over refractors. They are cheaper to manufacture, and they do not suffer from chromatic aberration.

3) Refraction is the bending of light as it passes from one medium to another. Refraction occurs because light waves travel at different speeds through different materials. The amount of refraction depends on the angle at which the light passes through the medium.

4) The image of a star is larger in the focal plane of the larger telescope. This is because the larger telescope collects more light than the smaller telescope, which means that the image is brighter and has a higher signal-to-noise ratio.

5) Quantum efficiency is a measure of how efficiently a detector converts incoming photons into electrical signals. A higher quantum efficiency means that more of the incoming

photons are detected, which makes it easier to detect faint astronomical objects.

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Answer:

Coulomb = 100

Micro coulomb = 100 × 10^-6 = 10^-4 coulomb

Answer:

This is due to the gap in between the switch. So the applied energy is not converted to current even though the resistance is still there. Hence voltage will be there, where you applied it

Explanation:

Answer:

one point

Explanation: trust me :)

Answer:

Variation of serving sizes

Explanation:

Explanation:

The two most commonly advanced reasons for the increase in the prevalence of obesity are certain food marketing practices and institutionally-driven reductions in physical activity, which we have taken to calling “the big two.” Elements of the big two include, but are not limited to, the “built environment”, increased ...

Explanation:

Remember

  V = IR       which is    V/I = R      120 v / .5 A = 240 Ω

Answer:

Option A

Explanation:

If the graph plotted against Distance and Time and the graph is a linear straight line then the body is IN CONSTANT VELOCITY.And Acceleration is 0

The sequence of energy transformations from the moment the ball is dropped to the moment the board is bent to its maximum extent and the ball is at rest is as follows:

1. The ball has potential energy (gravitational potential energy) from being held above the board.

2. As the ball is dropped, it gains kinetic energy as it accelerates to the ground.

3. When the ball hits the board, the kinetic energy is converted into elastic potential energy as the board bends.

4. As the board continues to bend, the elastic potential energy is converted into thermal energy.

5. Finally, when the board reaches its maximum extent, the ball is at rest and its kinetic energy has been completely converted into thermal energy.

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Answer:

Difficult to Pour.

Explanation:

Answer:

E max

=3.46×10

7

N/C

Explanation:

If the radius and charge are R and Q. We need to calculate the electric field due to the rod. Using formula of electric field. Where, Q = charge. z = distance. If z = 0, Then, The electric field is (b). If z = ∞, z>>R. So, R = 0. Then, the electric field is (c). In terms of R, We need to calculate the positive distance. If . Then, Taking only positive distance (d).

The mass of 3.99 moles of kr is 334 g. So, the correct option is option a) 334 g.

To determine the mass (in g) of 3.99 moles of Kr, we can use the molar mass of Kr and the given moles. Here's a step-by-step explanation:

To find the mass of 3.99 moles of Kr, we can use the following formula:

mass = moles x molar mass
1. Find the molar mass of Kr. The molar mass of krypton (Kr) is approximately 83.8 g/mol.
2. Multiply the given moles by the molar mass. Mass = moles × molar mass

Mass = 3.99 moles × 83.8 g/mol ≈ 334.4 g

The mass of 3.99 moles of Kr is approximately 334 g, so the correct answer is 334 g.

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Answer: Gravity is what holds the planets in orbit around the sun and what keeps the moon in orbit around Earth

Explanation:

In the thermal equilibrium, the change in temperature is said to be zero in between the bodies. Thermal equilibrium is reached when both objects have the same temperature.

Thermal equilibrium is easily explained by the zeroth law of thermodynamics. If any two-body is at thermal equilibrium there is no change in the temperature of the body.

According to zeroth law if body A is in thermal equilibrium with body B and body B is in thermal equilibrium with C . So body A and C are also in thermal equilibrium.

In the thermal equilibrium, the net heat transfer is said to be zero in between the bodies.

Hence option A IS RIGHT. Thermal equilibrium is reached when both objects have the same temperature

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According to the information we can infer that the travel angle is called a "drag" angle.

In welding terminology, the travel angle refers to the angle between the axis of the electrode and the workpiece surface. When the top of the electrode leads the welding end (meaning the electrode is inclined downward at an angle) and the welding arc is pointing back toward the weld bead, it is known as a "drag" angle.

In this configuration, the electrode is dragged along the surface of the workpiece, creating a trailing arc direction. This technique is commonly used in certain welding processes, such as shielded metal arc welding (SMAW) or stick welding, to control the heat input and the direction of the molten metal flow during the welding operation.

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a)  p₀ = 1.2 kg m / s

b) p_f = 1.2 kg m / s  

c)    \(v_{2f}\) = 1.278 m/s

d)1.2482 =\(v_{2f}\) cos θ

e)  0.2736 =\(v_{2f}\)sin θ

g) θ = 12.36

Momentum is the product of the mass of a particle and its velocity. Momentum is a vector quantity; i.e., it has both magnitude and direction.

According to the question,

We define a system formed by the two balls, which are isolated and the forces during the collision are internal.

Hence , the momentum is conserved

a) The momentum of the system before the collision:

\(p_o = m v_1_0 + 0 p_o= 0.6 2 p_o = 1.2 kg m / s\)

b) The momentum of the system after the collision, as the system is isolated, the momentum is conserved so

\(p_f = 1.2 kg m / s\)

d. On X axis

\(p_ox\) = 1.2 kg m / s

\(p_{fx}\)= m v1f cos 20 + m v2f cos θ

\(p_o = p_f\)

1.2 = 0.6 (-0.8) cos 20+ 0.6\(v_{2f}\) cos θ

1.2482 =\(v_{2f}\) cos θ

e. On Y axis  

\(p_{oy} = 0\)

\(p_{fy}\)= m\(v_{1f}\)sin 20 + m\(v_{2f}\)cos θ

0 = 0.6 (-0.8) sin 20 + 0.6 \(v_{2f}\) sin θ

0.2736 =\(v_{2f}\)sin θ

Here,

g. we write our system of equations

0.2736 =\(v_{2f}\) sin θ

1.2482 = \(v_{2f}\) cos θ

0.219 = tan θ (divide)

θ = tan⁻¹ 0.21919

θ = 12.36

c. Now To find the velocity

0.2736 = \(v_{2f}\) sin θ

\(v_{2f}\)= 0.2736 / sin 12.36

\(v_{2f}\) = 1.278 m / s

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Answer:

+9.8m/s^2

Explanation:

The rate of gravity of the object is constant thriughout the surface of the earth.

For falling object, the rate of gravity is positive since the body is coming down (falling)

The rate of gravity is negative if the body is going up

The constant value for acceleration due to gravity is 9.8m.s^2

Since the object is falling, hence the acceleration due to gravity is positive.

Rate of gravity working on the object will be +9.8m/s^2

Answer:

· Periodic table, in full periodic table of the elements, in chemistry, the organized array of all the chemical elements in order of increasing atomic number —i.e., the total number of protons in the atomic nucleus. When the chemical elements are thus arranged, there is a recurring pattern called the “periodic law” in their properties, in which elements in the same column (group) have similar properties.

its d btw

\(\huge{ \star \fcolorbox{magenta}{purple}{ \fcolorbox{magenta}{blue}{ \fcolorbox{magenta}{pink}{ \fcolorbox{magenta}{red}{ \sf{photosphere}}}}}} \star\)

Answer:

PHOTOSPHERE

Explanation:

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