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A rod has a cross-sectional area of 0.001615 m2. When the rod's temperature is 12.23°C, it is placed among two rigid walls that are exactly as far apart as the length of the rod. The rod's temperature then increases to 27.23°C, and the rod exert a force of 5.334×104 N on each wall. If Young's modulus for the material of which the rod is made is 1.05×1011 N/m2, what is the coefficient of linear expansion of the rod?
A 50 kg child jumps into a small pool of water through a distance of 3 m and aquires 1000 J of kinetic energy. Assuming all of this energy goes into heating 10 kg of water in the pool, what is the change in temp of the water?
A violin string 12.5 cm long and fixed at both ends oscillates in its n = 5 mode. The speed of waves on the string is 268 m/s, and the speed of sound in air is 348 m/s. What are (a) the frequency and (b) the wavelength of the emitted sound wave?
A proton accelerates from rest in a uniform electric field of 524 N/C. What is the magnitude of the acceleration of the proton
A fire hose ejects a stream of water at an angle of 36.5 degrees above the horizontal. The water leaves the nozzle with a speed of 27.0 m/s. Assuming that the water behaves like a projectile, how far from a building should the fire hose be located to..
Captain Omega of the Imperial Space Patrol is in his Starcruiser,which is in a circular orbit around the mysterious Planet X. What is the orbital speed of the Star cruiser
An electron is accelerated through 2,400 V from rest and then enters a region where there is a uniform 1.70 T magnetic field. What is the maximum magnetic force this charge can experience?
a subway train starts from rest at a station and accelerates at a rate of 1.64 for 13.1 . it runs at constant speed for
A vertical solid steel post 25 cm in diameter and 3.50 m long is required to support a load of 7100 kg. You can ignore the weight of the post. What is the strain in the post
a 125 lb person falls from height of 10 ft. he bends his legs so that he comes to a stop over a distance of 2 ft, What is the avg. force that his legs have to exert to stop him
a black of mass m sliding on a frictionless table is attached to a horizontal string that passes through a tiny hole in
A researcher heats a 100g piece of unknown material to 150 C,and then drops it into an insulated cup holding 300g of water at25C. What is the specific heat of the material
A soccer ball lying on the ground is kicked with an initial velocity of 10.0 m/s at an angle of 37 degrees above the horizontal
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