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A 3-kg ball moving at 11 m/s collides elastically and head-on with a second 20-kg ball moving in the opposite direction with -11 m/s. What is the speed of the first ball after the collision? Give your answer in m/s to three significant figures.
Starting from rest, a 92-kg firefighter slides down a fire pole. The average frictional force everted on him by the pole has a magnitude of 840 N, How far did he slide down the pole
A textbook of mass 1.90kg rests on a frictionless, horizontal surface. A cord attached to the book passes over a pulley whose diameter is 0.150m, What is the tension in the part of the cord attached to the textbook
I am rising upward in a hot air balloon. I am holding my coffee container and i accidentally let go of it when I am leaning out and enjoying the view. Whats the greatst height the container achieved in its flight
A force is applied to a 100-kg go-cart to accelerate it from 10.0 m/s to 20.0 m/s over a 7.00 s time frame. what is the magnitude of the force applied
Two adjacent natural frequencies of an organ pipe are found to be 450 Hz and 495 Hz. What is the length of the pipe
The initial angle of the ball’s motion off the tee is 29.0° above the horizontal. If the tee level is 17.0 m above the level of the fairway, explain how far east of the tee does the ball hit the fairway?
A small plastic ball of mass 5.55 x 10-3 kg and charge+0.192C is suspended from an insulating thread and hangs betweenthe plates of a capacitor (see the drawing). The ball is inequilibrium, with the thread making an angle of 30.0owith respect to t..
1. find the mass of 600 cubic centimeters of water.2. what is the volume of 50 kg of water.?3. what is the volume of 50
q1. the brick wall of thermal conductivity 0.91 wmdegrees c of a building has dimensions 2.9 m by 6 m and is 18 cm
A line of charge with uniform density of 28.0 nC/m lies along the line y = -15.0 cm, between the points with coordinates x = 0 and x = 32.0 cm
Estimate how much the density of water changes between surface water and deep ocean water on the OR coast, assuming that only temperature changes. Apply reasonable estimates (+- 2 degrees Celsius) for the surface and deep water temperature, using val..
A car is moving with a speed of 32.0 m/s. The driver sees an accident ahead and slams on the brakes, how far does the car travel after the driver put on the brakes before it comes to a stop
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