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Q. At time t=0 the particle has its maximum speed of 20.00 m/s and is at the speed of 115 bullets/min, the speed of each bullet being 400-m/s. Assume too that the bullets rebound straight back with no change in speed. What is the magnitude of the average force on Superman's chest from stream of bullets?
The speakers produce the same single-frequency tone in either drawing and are in phase. The speed of sound is 343 m/s. Find the single smallest frequency that would produce both constructive interference in drawing 1 and destructive interference in d..
Water has a mass per mole of 18g/mol, and each water molecule (H2O) has 10 electrons.
Two small spheres spaced 20centimetres apart have equal charge. How many excess electrons should be present on each sphere if magnitude of the force of repulsion between them is newtons.
Attempting to stop on a slippery road, a car moving at 80 skids across road at a 30 angle to its initial motion, coming to a stop in 3.8.
A rectangular barge, 4.0 m long and 1.5 m wide, floats in fresh water. (a) Find out how much deeper it floats when its load is a 380-kg horse. (b) If the barge can only be pushed 15 cm deeper into the water before water overflows to sink it, how m..
A sound wave traveling at 340 m/s is emitted by the foghorn of a tugboat. An echo is heard 2.60 s later. How far away is the reflecting object? reply in units of m.
Ice at -14.9 °C and steam at 115 °C are brought together at atmospheric pressure in a perfectly insulated container. After thermal equilibrium is reached, the liquid phase at 52.0 °C is present.
An airplane is flying with the velocity of 82.0 at an angle of 22.0 above the horizontal. When the plane is a distance 111 straight above a dog that is standing on level ground, a suitcase drops out of the luggage compartment. How far from the dog..
A ball starts at a point 30 m above the bottom of a dip with of 25 m/s. overlook friction, what will be the speed of the ball at the top of the next slope, which is 45 m above the bottom of the dip.
how high does it rise above the point of free.
Dennis, driving his 600 kg car, makes a 90 degree turn. His speed before the turn is 15.0 m/s and after the turn are 20 m/s. What is the magnitude of the change in car's momentum.
The two blocks, m1 = 1.40 kg and m2 = 5, are connected by a mass less rope that passes over a pulley. The pulley is 12 cm in diameter and has a mass of 2.0 kg.
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