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A military gun is mounted on a railroad car (m = 1419 kg) as shown in the figure below There is no frictional force on the car, the track is horizontal, and the car is initially at rest. The gun then fires a shell of mass 40 kg with a velocity of 299 m/s at an angle of 35° with respect to the horizontal. Find the recoil velocity of the car?
Two coils of wire are placed close together. Initially, a current of 2.3 A exists in one of the coils, What is the mutual inductance of the two-coil system
A dad pushes tangentially on a small hand-driven merry-go-round and is able to accelerate it from rest to a frequency of 18 rpm, in 13.0 s. What force is required at the edge
Students in a fraternity house want to be able to spray water 25 m across their neighbor's yard onto a patio. What size nozzle do they need
Desperate for money, you take a scary job climbing a very tall 2.640 hm high tower to make a repair. How far away are they in feet from the tower bottom
Two cars are travelling on a desert road. After 5s, they are side by side at the next telephone pole. The distance between the poles is 70m.
In order to drop a Pyrex glass marble 1.003 in diameter through the hole in the plate, how much must the temperature of the system be raised
q1. a thin horizontal copper rod is 1.59347 m long and has a mass of 33.2472 g.the acceleration of gravity is 9.8
A student at the top of a building throws a ball straight upward with an initial speed v0. How do the final velocities of the balls compare when they reach the ground
A 250, 35-cm-diameter turntable rotates on frictionless bearings at 60. A 25 block sits at the center of the turntable. A compressed spring shoots the block thoroughly outward next to a frictionless groove in the surface of the turntable.
A small object begins a free-fall from a height of H = 82.5 m at t0 = 0 s. At what height from the ground will the two objects first meet
On earth, two parts of a space probe weigh 13500 N and 3790 N. These parts are separated by a center-to-center distance of 14.4 m, Find the magnitude of the gravitational force
The background sound level at your plant is 84 dBA. If a compressor generates a sound level of 87.3 dBA, what will the combined sound level be when the compressor is on
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