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A lead ball with a velocity of 3.50m/s is to be dropped from a bridge that is 20 meters above the water, into a model boat moving with a constant velocity of 1.90m/s. How long must we wait to drop the lead ball so that it hits the model boat?
This problem introduces the concept of tension. The instance is a rope, oriented vertically, that is being pulled from both ends. Let and (with u for up and d for down) represent the magnitude of the forces acting on the top and bottom of the rope..
a consulting group surveyed general mills inc. employees to research the factors that affect their satisfaction with
One mole of a monatomic ideal gas has an initial pressure, volume, and temperature of Po, Vo, and 335 K, respectively. Find the total heat (including the algebraic sign) for this three-step process
A glass flask at 0 degrees Celsius is filled to the brim with 1000 cm(^3) of mercury, what is the coefficient of volume expansion in the glass
Have you ever listened for an approaching train by kneeling next to a railroad track and putting your ear to the rail. how many times greater is the speed of sound in the rail than in the air
A typical power transmission line carries a current of 1000 A about 30.0 meters above the ground. The magnetic field generated at groundlevel by the current is a matter of concern to those who live nearby.
A 4.1 g coin sliding to the right at 26.2 cm/s makes an elastic head-on collision with a 12.3 g coin that is initially at rest. Find the final velocity of the other coin
A 3.0 m long rigid beam with a mass of 105 kg is supported at each end. How much upward force does each support exert on the beam
A man enters a tall tower, needing to know its height. He notes that a long pendulum extends from the ceiling almost to the floor, How tall is the tower
A softball pitcher rotates a 0.250 kg ball around a vertical circular path of radius 0.4 m before releasing it. what is its speed upon release
A partly-full paint can has 0.82 U.S. gallons of paint left in it. What is the volume of the paint
The Millenium Falcon is chased by the Imperial Forces. The ship is moving at a speed of 0.615 c. What is the velocity of the protons in the resting frame when the cannon is shot in the backward direction
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