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A frictionless pulley in the shape of a solid cylinder of mass , M=3kg and radius R=0.4, is used to draw water from a well. A bucket of mass, m=2kg, is attached to a cord wrapped around the cylinddr. If the bucket starts from rest at the top of the well and falls for 3 s before hitting the water, how far did it fall?
Light enters a substance from air at 30 degrees to thenormal. It continues through the substance at 23 degrees tothe normal. What would be the critical angle for this substance
A newly discovered planet has a mass of 7.88 x1026 kg, and has a satellite whose mass is 6.44 x 1011 kg. what is the gravitational attraction between them
A 200KeV electron (i.e., an electron having kinetic energy of 200KeV) collides with a 200KeV positron (a particle with opposite charge of electron but) moving in the opposite direction in a head-on collision.
find the magnitude and direction of the field at this point.
Consider a circuit with a main wire that branches into twoother wires. If the current is 10 amperes in the main wire and 4amperes in one of the branches, how much current is in the other branch
The racer decides to race against a stock car. Both start from rest. The stock car leaves 1.0 sec before the race car. Find the velocities of both cars at the instant they are side by side
A 0.548-kg ball is attached to one end of an aluminum wire that has a diameter of 1.44 mm and an unstretched length of 0.651 m. Calculate the increase in its length due to the tension
A horizontal force, F1= 75N, ad a force, F2=15.4N acting at an angle of theta to the horizontal, are applied to a block of mass m= 2.9kg, what is normal force
A 90.3-MHz radio wave is broadcast from KTUH's transmitter. how much time does it take for the radio wave to reach you
a block of mass m1.665kg is floating stationary in a beaker of water. a string connected to the bottom of the beaker
Hanging from threads are two charged balls made of pith (a very light, spongy material that comes from inside the stems of certain plants). The balls each have a mass of 0.100 g and a charge of the same magnitude q and are attracted toward each ot..
Lasers are used extensively in eye surgery to remove unwanted "material" from the eye or reshape the eye's lens. What is the power during one of these pulses
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