Part 1. A catcher “gives” with the ball when he catches a 0.113 kg baseball moving at 22.4 m/s.

If he moves his glove a distance of 6.1 cm, what is the average force acting on his hand?

Answer in units of kN.

Part 2.

Repeat for the case in which his glove and hand move 10.5 cm.

Answer in units of N.

A spherically-symmetric planet is made of an empty inner core of radius a surrounded by a thick shell of radius 2a, which is surrounded by another thick shell of radius 3a. The inner shell has a volume density that only depends on radius and is given by s1(r) = br^3, where b is a known positive constant. The outer shell also has a volume density that only depends on radius and is given by s2(r) = y/(r^2), where y is a known positive constant.

[Planet 2]

b=alpha

s= rho

y=gamma

Find the gravitational field in the following regions in terms of G, b, y, a, and r.

r < a:

a < r < 2a:

2a < r < 3a:

r > 3a:

A point charge with charge q1 = 3.50 μC is held stationary at the origin. A second point charge with charge q2 = -4.80 μC moves from the point ( 0.170 m , 0) to the point ( 0.255 m , 0.260 m ). How much work W is done by the electric force on the moving point charge?

Express your answer in joules. Use k = 8.99×10⁹ N⋅m^2/C^2 for Coulomb's constant: k=1/4πϵ0.

An atom of beryllium (m = 8.00 u) splits into two atoms of helium (m = 4.00 u) with the release of 92.2 keV of energy. Suppose the beryllium atom moved in the positive x direction and had a kinetic energy of 44.0 keV. One of the helium atoms is found to be moving in the positive x direction. Find the direction of motion of the second helium, and find the velocity of each of the two helium atoms. Solve this problem in two different ways: by direct application of conservation of momentum and energy; and by applying the results if the original beryllium atom is at rest to a frame of reference moving with the original beryllium atom and then switching to the reference frame in which the beryllium is moving.

(a) by direct application of conservation of momentum and energy

(b) by applying the results if the original beryllium atom is at rest to a frame of reference moving with the original beryllium atom and then switching to the reference frame in which the beryllium is moving

emergency physics question!

what is the minimum film of coating with index of refraction of 1.52 on a glass with index of refraction of 1.40 for which destructive interference of a red component of white light in air can take place by reflection? assume the wavelength of the red component in vacuum is 650nm. find the minimum visible wavelength in vacuum for constructive interference due reflection for the thickness of the coating film you found.

what should be the minimum additional coating to get constructive interference for the red component of 650nm?

not just an answer, I need help understand the answer and the question!

STEP BY STEP explanation please!

Compare and contrast spin recovery procedures for

Cessna 150 and

T-37 What makes the recoveries different for each aircraft?

Suppose astronomers were to discover a new comet at an aphelion of 40.0 AU, with a transverse velocity of v₀= 941 m/s

What

Halley's comet, which passes around the Sun every 76 years, has an elliptical orbit. When closest to the Sun (perihelion) it is at a distance of 8.823

Two stationary positive point charges, charge 1 of magnitude 3.85 nC and charge 2 of magnitude 2.00 nC , are separated by a distance of 43.0 cm . An electron is released from rest at the point midway between the two charges, and it moves along the line connecting the two charges.

What is the speed V_final of the electron when it is 10.0 cm from charge 1?

Express your answer in meters per second.

Please show your work!

Two point charges are arranged so there is a small distance between them. One charge is positive and the other is negative. If the two charges have different magnitudes, there is a spot (not at infinity) where the total electric field is zero.

1) For the following hypothetical changes in astronomical bodies answer whether the change would make the specified property Larger, Smaller, or Not Changed.

If the radius of the Earth were larger, the force of gravity on objects on its surface would be .....
Larger Smaller Not Changed  

If the mass of the Sun were half as much and the Earth kept the same distance, the period of the Earth's orbit would be .....
Larger Smaller Not Changed  

If the mass of an object dropped on the surface of the Moon were increased, the acceleration of the object would be .....
Larger Smaller Not Changed

If the amount of ozone in the upper atmosphere of a planet is increased the amount of ultraviolet light reaching the surface will be ....
Larger Smaller Not Changed  

If the mass of Mars were greater, the acceleration due to gravity on its surface would be .....
Larger Smaller Not Changed  

If the distance between two planets is increased, the force of gravity is .....

2)

Classify the following statements as True or False based on the Nebular Theory for Solar System formation.
True /False  Rocky, metallic materials as well as volatile materials (He and H compounds) collected into planets near the Sun where the cloud is hot.
True/ False  Material for the planets was left over from the formation of the Sun.
True /False  Most of the thermal energy which started fusion reactions in the Sun originated as thermal energy in the large, hot dark nebula.

A piston contains 600 moles of an ideal monatomic gas that initally has a pressure of 2.44 × 105 Pa and a volume of 1.8 m3. The piston is connected to a hot and cold reservoir and the gas goes through the following quasi-static cycle accepting energy from the hot reservoir and exhausting energy into the cold reservoir. The pressure of the gas is increased to 5.44 × 105 Pa while maintaining a constant volume. The volume of the gas is increased to 8.8 m3 while maintaining a constant pressure. The pressure of the gas is decreased to 2.44 × 105 Pa while maintaining a constant volume. The volume of the gas is decreased to 1.8 m3 while maintaining a constant pressure. It may help you to recall that CV C V = 12.47 J/K/mole and CP C P = 20.79 J/K/mole for a monatomic ideal gas, and that the number of gas molecules is equal to Avagadros number (6.022 × 1023) times the number of moles of the gas. 1) How much energy is transferred into the gas from the hot reservoir? J 2) How much energy is transferred out of the gas into the cold reservoir? J 3) How much work is done by the gas? J 4) What is the efficiency of this cycle?

An outer wall is covered by insulating material in order to reduce heat loss. Across which layer (bricks or insulation) is the temperature drop is the largest?

7. A 1100-kg car is moving toward the north along a straight road at a speed of 20.0 m/s. The driver applies the brakes and the car comes to rest in a distance of 140 m.

(a) If the road is completely level, what is the constant force applied to the car to bring it to rest? (Remember to specify the direction.)

(b) If the road goes down a hill at a 4� angle with respect to the horizontal, what is the constant force applied to the car to bring it to rest?

(c) What is the source of the force that brings the car to rest? (In other words, what is exerting the force on the car?) Explain your answer clearly.

Briefly describe the interior structure of Jupiter and explain why it is layered in this way. How do the interiors of the other jovian planets compare to that of Jupiter?