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A rock is thrown vertically upward with a speed of 11.0m/s from the roof of a building that is 70.0m above the ground. Assume free fall.
A) In how many seconds after being thrown does the rock strike the ground?
B) What is the speed of the rock just before it strikes the ground?
A mass rests on top of the piston. The initial temperature of the system is 305 K and the pressure of the gas is held constant at 137 kPa. The temperature is now increased until the height of the piston rises from 23.4 cm to 27.0 cm. What is the f..
the 25g bullet travelling at 350m/s strikes a block of wood. The block of wood exerts an average force of 50,000N opposing the motion of the bullet. How far does the bullet penetrate while stopping.
A female gymnast weighs 620 N. If she is hanging stationary from a high bar, how many forces are acting on her.
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Estimate the current in an L-R circuit for t>T if the EMF is (12/T) t for 0
A certain freely falling object requires 1.85s to travel the last 31m before it hits the ground. From what height above the ground did it fall.
Find out the tension in the rope
Explain, in detail, why the dust clings to the wheels. Be sure to describe forces by name and mention charging by induction, conducting, or rubbing, if it is appropriate. Also illustrate what atoms on Mars must be composed of.
Assuming the acceleration is constant during each time interval (but not necessarily the same in both intervals), illustrate what distance does the shuttle travel during the interval from 8.00s to 1.00min ?
A projectile is launched from a cannon at ground level at an angle of 62.0 degrees elevation and has a muzzle velocity of 481 m/s. Explain how many seconds after it is fired does it reach max height?
A rubber balloon filled with air is rubbed against a wool sweater and acquires a negative charge. The balloon is placed up against a flat wall and released. The balloon stays stuck to the wall. How is this possible if the wall is not charged in an..
Two trains and a bird Two trains, each having a speed of 23km/h, are headed at each other on the equal straight track. A bird that can fly 60km/h flies off the front of one train when they are 70 km apart and heads directly for the other train.
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