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A blue ball is thrown upward with an initial speed of 22.8 m/s, from a height of 0.9 meters above the ground. 2.8 seconds after the blue ball is thrown, a red ball is thrown down with an initial speed of 12.2 m/s from a height of 29.1 meters above the ground. The force of gravity due to the earth results in the balls each having a constant downward acceleration of 9.81 m/s2. What is the height of the red ball 3.64 seconds after the blue ball is thrown?
How long after the blue ball is thrown are the two balls in the air at the same height?
A block of mass m = 4 kg slides back and forth on a frictionless horizontal track. It is attached to a spring with a relaxed length of L = 4 m, By what length is the spring extended
A hydraulic lift consists of two pistons that connect to each other by an incompressible fluid. If one piston has an area of 0.49 m^2 and the other an area of 6.2m^2, how big a mass can be raised by a force of 220N exerted on the smaller piston.
The length of a simple pendulum is 0.79 m, and the mass of the bob at the end of the cord is 0.24 kg. What is the angular frequency of the motion
A room with 2.9m high ceilings has a metal plate on the floor with V= 0V and a separate metal plate on the ceiling. How high does the ball go if the ceiling voltage is 3.5×10^6V
A falling stone takes 0.28 s to travel past a window 2.2 m tall. From what height above the top of the window did stone fall.
A small drop of oil is suspended motionless in the air by a uniform electric field that is directed upward and has a magnitude of N/C, What is the mass of the drop
One end of a nylon rope is tied to a stationary support at the top of a vertical mine shaft of depth 83.0 m. What is the wave speed at the top of the rope
In the figure below, two skaters, each of mass 35 kg, approach each other along parallel paths separated by 2.2 m. They have opposite velocities of 1.9 m/s each. What is the angular speed of the skaters
Suppose that the specific heat capacity cp Of the body discussed in Section 7.6 of the text is 10 J kg-1 K-1and T1 =200 K. Find the entropy change of the universe in both cases
Two long, straight, parallel wires of length 4.1 m carry parallel currents of 3.2 A and 1.1 A. What is the magnitude of the force between the two wires
An electrician connects two different bulbs in seriesto 120 V circuit. One bulb is rated as 40 W for a nominal voltage 220V, Which of the two bulb is producing more light
If the accelerating plates are 1.00cm apart, and have a potential difference of 2.55×104V , what is the magnitude of the uniform electric field between them
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