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An 10-kg ball moving at 22 m/s collides elastically and head-on with a second 6-kg ball moving in the opposite direction with -15 m/s. What is the speed of the first ball after the collision? Give your answer in m/s to three significant figures.
At rest a person has a metabolic rate of 4.2 x 10^5 J/hr. The person is submerged neck-deep into a tub containing 1.0 x 10^3 kg water at 27.00 degrees Celcius. what is the water's temperature after a half hour
In the absence of air resistance, a ballplayer tosses a ball straight up. By how much does the speed of the ball decrease each second while it is ascending
q1. as part of a safety investigation two 1300kg cars traveling at 18ms are crashed into different barriers. find the
A charged particle of mass m and charge +q is placed in the vertical electrical field E(x)= A-Cx, Find expression describing the angular frequency of the charged particle oscillations
Compressed air can be pumped underground into huge caverns as a form of energy storage. how many homes could this internal energy serve for one day
A soccer player extends her lower leg in a kicking motion by exerting a force with the muscle above the knee in the front of her leg. What is the force exerted by the muscle if its effective perpendicular lever arm is 2.10 cm
A bucket filled with water exerting a force of 529N is hanging from a rope that is wound around a 0.05 m radius stationary cylinder. If cylinder does not rotate and the bucket hangs straight down, what is the magnitude of torque the bucket produce..
A startled armadillo leaps upward rising 0.544 m in the first 0.202 s. What is its initial speed as it leaves the ground?
A large electromagnet draws a current of 261.00 A at 311.00 V. The coils of the electromagnet are cooled by a flow of water passing over them. what is the minimum rate of flow of water through the electromagnet
How much energy does a 100 watt light bulb use in 1 hour? Express your answer in joules Also find how much money it costs if electricity sells for 10 cents per kW-h.
If this amount were shaped into a cube, what would be the length of one edge of that cube (in meters)
A projectile is fired straight upward at 166m/s
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