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A rock of 130 kg is found at the top of a mountain that is 1140-m high. Find the potential energy with respect to the bottom of the mountain (g = 9.8 m/s2).
A 74 kg man in a 6.0 kg chair tilts back so that all the weight isbalanced on two legs of the chair. find the pressure exerted by each leg on the floor
captain carmen fires a pistol at captain black but the lead ball misses and hits the oak mast. if the .05kg ball is
two points on a string are observed as a traveling wave passes them. the points are at x1 0 and x2 1 m. the
When a parachute opens, the air exerts a large drag force on it. This upward force is initially greater than the weight of the sky diver and, thus, slows him down. What is his acceleration, including sign
A dropped rubber ball hits the floor with a speed of 8.0 m/s and rebounds to a height of 0.25 meter. Determine what fraction of the initial kinetic energy was lost in the collision
On a part-time job, you are asked to bring a cylindrical iron rod of density 7800 , length 84.4, Calculate the weight of the rod
a 890kg electric car uses a 270v battery pack. as the car accelerates from rest 450c flows from the battery. whats the
The wavelength of the waves in seawater is 4.80 x10-4 m. While the generator is directed downward, an echo reflected from the ocean floor is received 10s later.
What is relation between linear charge density and volume charge density of infinite cylinder?
In the isothermal compression of an ideal gas, the volume occupied by the gas is decreasing, but the temperature of the gas remains constant. In order for this to happen, A. heat must enter the gas. B. heat must exit the gas. C. no heat exchange shou..
A horizontal 799-N merry-go-round is a solid disk of radius 1.45 m, started from rest by a constant horizontal force of 49.9 N applied tangentially to the edge of the disk
An object, which is initially at rest on a frictionless horizontal surface, is acted upon by four constant forces. F1 is 28.6 N acting due East, F2 is 41.2 N acting due North, F3 is 47.8 N acting due West, and F4 is 10.8 N acting due South. How mu..
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