Physics, 30.10.2019 19:31 aliviafrancois2000
Aballistic pendulum is a device that can be used in police labs to measure the muzzle velocity of a particular firearm. in this example, we're given the velocity of the bullet, and we're going to use that to find other things. the ballistic pendulum is a simple device—the pendulum part consists of a wooden block, which has a mass of 880. grams, hanging from a string. the block is initially at rest. however, a bullet with a mass of 15.0 grams is fired at the block. the bullet embeds itself in the block, and the bullet and block then oscillate back and forth on the string, pendulum style, after the collision. just before impact with the block, the bullet's velocity is 200. m/s, directed entirely horizontally. use g = 9.80 m/s^2. a) determine the speed of the block + bullet system immediately after the collision. m/s b) determine the maximum height, measured from the level where the block starts, that the block + bullet rise to after the collision. m
Answers: 1
Physics, 22.06.2019 03:00
Arotating space station is said to create “artificial gravity”—a loosely-defined term used for an acceleration that would be crudely similar to gravity. the outer wall of the rotating space station would become a floor for the astronauts, and centripetal acceleration supplied by the floor would allow astronauts to exercise and maintain muscle and bone strength more naturally than in non-rotating space environments. if the space station is 200 m in diameter, what angular velocity would produce an “artificial gravity” of 9.80 m/s^{2} 2 at the rim?
Answers: 3
Physics, 22.06.2019 07:40
Which lists the fundamental forces in order, from strongest to weakest? strong nuclear, weak nuclear, electromagnetic, gravitational strong nuclear, electromagnetic, weak nuclear, gravitational gravitational, weak nuclear, electromagnetic, strong nuclear electromagnetic, gravitational, strong nuclear, weak nuclear
Answers: 2
Physics, 22.06.2019 12:00
Explain why electric current cannot exist if a current doesn't have a voltage source.
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Aballistic pendulum is a device that can be used in police labs to measure the muzzle velocity of a...
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