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Two blocks of identical wood sit on slippery (no friction) ice. You fire a bullet at each block. At the first block, you fire a metal bullet that impales itself in the block. At the second block, you fire an equal-mass, equal-speed rubber bullet that bounces straight back from the wood block. Which wood block if either will have the greatest speed after the collisions? Please explain your reasoning!
According to recent test data, an automobile travels 0.250 mi in 19.9 s, starting from rest. The same car, when braking from 60.0 mi/h on dry pavement, stops in 146 ft. Find the acceleration of this car when it is speeding up
a Hydrogen atom is in the gound state. it absorbs some energy, leaving the atom in an excited state, calculate the wavelength of the second photon
A certain solid-propellant model rocket engine releases a total of 6000 J as it burns. what fraction of the chemical energy released by the engine is wasted in the form of thermal energy in the air
Consider a square window of side L=1.00m that lies in the plane of the blackboard at the front of the classroom. calculate the electric flux through the window
A 100 [kg] cannon fires a 10 [kg] steel ball horizontally with a speed of 50 [m/s]. What is the recoil speed of the cannon
A swimming duck paddles the water with its feet once every 1.6s, producing surface waves with this period. How far apart are the crests behind the duck
q1. how many 104 w lightbulbs can you use in a 134 v circuit without tripping a 14 a circuit breaker? the bulbs are
A circuit consists of two 2.37?k? resistors in series with an ideal 9.00?V battery. Calculate the current flowing through each resistor
A parallel beam of light with an energy flux S of 10 W/cm2 falls for 1 hour on a perfectly reflecting plane mirror of 1.0 cm2 area. what force acts on the mirror
Cliff and Will support the board at each end so that it is horizontal. A 64 kg boulder is placed on a 2.00 m long board at a point that is x = 1.7 m from Cliff. What force does Will apply to the board
A counterweight of mass m = 3.80 kg is attached to a light cord that is wound around a pulley, What is the net torque on the system about the axle of the pulley
A student driving at a constant speed of 45 m/sec passes a highway patrol car parked on the side of the road. How long does it take to over take the student
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