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A student presses a book between his hands, as the drawingindicates. The forces that he exerts on the front and back coversof the book are perpendicular to the book and are horizontal. Thebook weighs 28 N. The coefficient ofstatic friction between his hands and the book is 0.41. To keep the book from falling, what is themagnitude of the minimum pressing force that each hand mustexert?
A helicopter flies over the arctic ice pack at a constant altitude, towing an airborne 117-kg laser sensor which measures the thickness of the ice, find the tension in the cable towing the sensor
One end of a nylon rope is tied to a stationary support at the top of a vertical mine shaft of depth 85.0 m. What is the wave speed at the bottom of the rope
Ball A is fired straight upward, Ball B is fired straight down, and Ball C is fired horizontally. Rank, from largest to smallest, the speed of each ball at the instant (just before) it collides with the ground.
A woman on a 10 speed bicycle travels at 9 m/s relative to ground as a she passes a little boy on a tricycle going in the opposite direction. If the boy is travelling at 1m/s relative to the ground, how fast does the boy appear to be moving relati..
Every year, there is a foot race to the top of the Empire State Building. what was his average power output during the race
Block A of mass 3 kg slides into block B of mass 2 kg. Before collision, block A moves to the right with speed 10 m/s and block B is stationary, what is the kinetic energy change for the system
By differentiating the expression for the Maxwell-Boltzmann energy distribution, show that the peak of the distribution occurs at an energy of (1/2)kT.
Eddie the Eagle, British Olympic ski jumper, is attempting his most mediocre jump yet. What was the magnitude of Eddie's initial velocity as he left the ramp
A 4.0-m-long iron bar of uniform cross section is held perpendicular to the wall by a wire from the end of the bar to the wall. What is the tension in the wire
A mixture of ethyl alcohol (molecular mass = 46.1 u) and water (molecular mass = 18.0 u) contains one mole of molecules. What mass m of water does it contain
A planet of mass m = 8.15 Ã? 1024 kg is orbiting in a circular path a star of mass M = 6.05 Ã? 1029 kg. What is the orbital period (in earth days) of the planet Tplanet
A sample of 755 moles of nitrogen gas is maintained at aconstant pressure of 1.00 atm in a flexible container.The gas is heated from 40.2oC to177oC. Calculate the change in internal energy
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