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You have just moved into a new apartment and are trying to arrange your bedroom. You would like to move your dresser of weight 3,500 \rm N across the carpet to a spot 5 \rm m away on the opposite wall. Hoping to just slide your dresser easily across the floor, you do not empty your clothes out of the drawers before trying to move it. You push with all your might but cannot move the dresser before becoming completely exhausted. How much work do you do on the dresser?
You shoot an arrow into the air. Two seconds later arrow has gone straight upward to a height of 30 meters above its launch point. a) What was the arrow's initial speed? b) How long did it take for the arrow to first reach a height of 15 meters ab..
Using Newton's Version of Kepler's Third Law II Part A Pluto's moon Charon orbits Pluto every 6.4 days with a semimajor axis of 19,700 kilometers. Calculate the combined mass of Pluto and Charon
while Jo moves off in the opposite direction at a speed of 0.946m/s. assuming that friction is negligible, find out Al's mass.
A device used in radiation therapy for cancer contains 0.38 g of cobalt-60 (59.933 819 u). Determine the activity (in Bq) of the radioactive material
You have designed a rocket to be used to sample the local atmosphere for pollution. It is fired vertically with a constant upward acceleration of 18 m/s2. Determine the total time the rocket is in the air
An object through a rectangular
Two concentric metallic spheres of radii r1 and r2> r1, respectively, are maintained at temperatures T1 and T2, and are separated by a layer of homogeneous material thermal conductivity k.
A blue ball is thrown upward with an initial speed of 23.3 m/s, from a height of 0.7 meters above the ground. 2.9 seconds after the blue ball is thrown, What is the speed of the blue ball when it reaches its maximum height
define the magnitude of the acceleration of the block. What is the electric ?eld strength.
A solid cylinder is mounted above the ground with its axis of rotation oriented horizontally. What is the angular acceleration of the cylinder
If the initial speed of the block is increased to infinity, it turns out that the time taken for the block to come to a rest approaches a finite value whereas the distance traveled approaches infinity, Find the maximum time taken for the block to c..
A blob of iron sinks form the surface of earth to the center. Assume the blob does not transfer any energy to its surroundings. Assume the density of earth is uniform.
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