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A baseball has a mass of 0.142 kilogram and is moving horizontally to the right at 36.1 m/s toward a batter. The baseball is struck by the bat and leaves it horizontally but in the opposite direction at 47.9 m/s. suppose that the ball and the bat remain in contact with each other for 128.9 ms.
A) Calculate the average force of the bat on the ball.
B) Define how Newton's Third Law is involved in this problem.
Electrons are ejected from a metallic surface with speeds ranging up to 4.60 × 105 m/s when light with a wavelength of 625 nm is used. What is the cutoff frequency for this surface
A .41m copper rod w/ mass .17 kg carries a current of 13A in the positive x direction. Let upward be the positive y direction. What is the magnitude of the minimum magnetic field
A rope can withstand 1.0 x 10^3 N of tension. If the rope is being used to pull a 10.0-kg package across a c=frictionless surface, what is the greatest acceleration that will not break the rope
A string is wrapped around a pulley with a radius of 2.0cm. The pulley is initally at rest. What is the moment of inertia of the pulley
a racetrack has the shape of an inverted cone. on this surface the cars race in circles that are parallel to the ground
A 78 g basketball is launched at an angle of 47.3 and a distance of 16.6 m from the basketball goal. What speed must the player give the ball
A mechanic jacks a car up to an angle of 6.0 degree to change the front tires. The car is 2.9 meter long and has a mass of1130 kilogram. Find the torque exerted by the car around the back wheels
A 680 kg satellite is in a circularorbit about the Earth at a height above the Earth equal to theEarth's mean radius. Find the period of its revolution
In a refrigerator, heat is transferred from a colder area (theinside of the refrigerator) to a warmer area (the air outside ofthe refrigerator). Given what you know about internal energy,explain how this is possible.
You wish to reduce the intensity of a beam of 1-MeV gamma rays from 5.12 x 10^7 per second to 2 x 10^5 per second. What thickness of aluminum is required
the supersonic aircraft concorde has a length of 61.5m when sitting on th ground on a typical day when the temperature is 15.0 degrees C. what is the temperature of the concordes skin in flight
An MP3 player operates with a voltage of 3.7 V, and is using 0.21 W of power. Find the current being supplied by the player's battery
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