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A thin spherical shell has a radius of 2.3 m and a mass of 450 kg, and its center is located at the origin of a coordinate system. Another spherical shell with a radius of 1 m and mass 125 kg is inside the larger shell with its center at 0.6 m on the x axis. What is the gravitational force of attraction between the two shells?
An iron bar 40 cm long is braised to a copper bar 50 cm long and of the same diameter. What is the heat flow down the rod if its cross-sectional area is 2.50 cm2
A rod is measured to be 12cm by an observer moving at 0.60c with respect to the length of the rod. What is the proper length of the rod
Two masses are placed on an airtrack and given initial velocities towards each other. Calculate the impulse acting on mass one during the collision
A solid cylinder of radius 0.35 m is released from rest from a height of 1.8 m & rolls down the incline as shown. Find the angular speed of the cylinder when it reaches the horizontal surface?
A rescue helicopter lifts a 80 kg person straight up by means of a cable. The person has an upward acceleration of 0.70 m/s2, How much work is done by the tension in the cable
You have a circular swimming pool with a diameter of 3.60 m. If you pump water into the pool at a rate of 1.87 x 104 cm3/s, how fast is the level of the water rising
A heat pump moves heat from outside, where the temp is 1 degree C, to inside a building, where the temp is 20 degrees C, How much heat is dumped into the building in each cycle
A shell is fired from a gun with a muzzle velocity of 35 m/s, at an angle of 60° with the horizontal. How far from the gun does the other fragment land
Dan is gliding on his skateboard at 4. He suddenly jumps backward off the skateboard, kicking skateboard forward at 8.00 (as measured by an observer on the ground). Dan's mass is 60 and skateboard's mass is 5.00 .How fast is Dan going as his fee..
It is proposed that future space stations create an artificial gravity by rotating. What rotation period will provide "normal" gravity
A metal sphere A has charge Q. Two other spheres, B and C, are identical to A except they have zero net charge. A touches B, then the two spheres are separated
A column of oil of height 70.0 cm supports a column of an unknown liquid. Determine the density of the unknown liquid
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