What is the kinetic energy of the baseball
An outfielder throws a 0.150 kg baseball at a speed of 39.6 m/s and an initial angle of 34.0° What is the kinetic energy of the baseball at the highest point of its trajectory?
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Two identical loudspeakers are 3.2 m apart. A person stands 5 m from one speaker and 4.2 m from the other. What is the lowest frequency at which destructive interference will occur at this point? The speed of sound in air is 343m/s in Hz.
Calculate the amount of work (in electron-volts) it would take to move an electron from 11.6 to 13.4 away from a +3.50 point charge.
A 62 kg boy and a 45 kg girl use an elastic rope while engaged in a tug-of-war on a frictionless icy surface. If the acceleration of the girl toward the boy is 3.3 m/s2, determine the magnitude of the acceleration of the boy toward the girl.
A pebble is dropped down a well and hits the water 1.1s later. Using the equations for motion with constant acceleration, determine the distance from the edge of the well to the water's surface.
A 1250kg is pulling a 325kg trailer. Together the car and trailer have an acceleration of 2.15m/s squared. Determine the net force on the car-trailer combination.
A steel tank contains a large quantity of compressed air. When the tank is submerged for an hour in a cold-water tank, the air loses 245 J of heat to the water. What is the change in the internal energy of the air?
A material contains 50.0 grams of carbon 14, and is 300,000 years old. It has a half life of 5730 years. What was its original mass?
A 1.4 kg block is attached to a horizontal spring with spring constant 2800N/m. The block is at rest on a frictionless surface. A 8.90g bullet is fired into the block, in the face opposite the spring, and sticks. What was the bullet's speed if the
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