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A rifle is aimed horizontally at a target 51m away. The bullet hits the target 2.0cm below the aim point. What was the bullet's flight time? What was the bullet's speed as it left the barrel? Express your answer using two significant figures.
An athlete competing in the hammer throw swings a 4.0 kg hammer on a chain in a horizontal circle with a 5.4 m diameter. What is the tension in the chain attached to the hammer at that speed
An 80.0-m-long brass rod is struck at one end. A person at the other end hears two sounds as a result of two longitudinal waves, What is the time interval between the two sounds
Two parallel conducting plates are separated by 10.0 cm, and one of them is taken to be at zero volts. What is the voltage between the plates
1. a spring with negligible mass stretches 34.0 cm when a 144 g gram mass is suspended from it. now inbspsuspend a
A shot put is released with a horizontal velocity of 12 m/s and stays in the air for 2.0 seconds At what angle with the horizontal was it released
Take element Z = 21 from the periodic table. Ionize it 20 times so that there is only one electron left orbiting around the nucleus. What is the ground state energy of the electron
Suppose a block with mass 2.80 kg is resting on a ramp. If the coefficient of static friction between the block and the ramp is 0.440, Find the maximum static friction force that acts on the block
Sand from a stationary hopper falls onto a moving conveyor belt at the rate of dm/dt = 5 kg/s, Find the sand's rate of change of momentum in the horizontal direction
A point charge q = +4.3 µC is placed at each corner of an equilateral triangle with sides 0.21 m in length. What is the magnitude of the electric field at the midpoint
In a "Rotor-ride" at a carnival, people pay money to be rotated in a vertical cylindrically walled "room." what is the minimum coefficient of static friction so that the people will not slip down
During an all-night cram session, a student heats up a one-half liter (0.50E-3 m^3) glass (Pyrex) beaker of cold coffee. How much coffee (in cubic meters) has spilled out of the beaker
question1a space station is constructed in the shape of a wheel 20 in diameter with essentially all of its 5.1times105
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