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At a fabrication plant, a hot metal forging has a mass of 78 kg and a specific heat capacity of 430J/(kg·°C). To harden it, the forging is immersed in 710kg of oil that has a temperature of 32°C and a specific heat capacity of 3000 J/(kg·°C) . The final temperature of the oil and forging at thermal equilibrium is 47°C. Assuming that heat flows only among the forging and the oil, decide the initial temperature of the forging.
Determine the minimum time require for the automobile to come to rest and the distsnce it travels on the exite ramp during that time if the exit ramp (a) is straight (b) has
One of the predicted problems due to global warming is that ice in the polar ice caps will melt and raise sea level everywhere in the world. Where is this problem the most wo
Your roommate is sold on "magnet therapy" a sham treatment using small bar magnets attached to the body. You sceptically ask your roommate how this is supposed to work. He mum
Two long straight wires are parallel and 7.8 cm apart. Theyare to carry equal currents such that the magnetic field at a pointhalfway between them has magnitude 350 µT. How mu
A 204.7 kg satellite is in a circular orbit of 22,000 miles (35,405,000 m) in radius. The force keeping the satellite in orbit is 49.8 N. What is the velocity (speed) of the
Two blocks are connected by a string over a frictionless, massless pulley such that one is resting on an inclined plane of 60 degrees and the other is hanging over the top e
suppose the apparatus as used in this lab: A cube of mass M = 500 g and side length 30 mm is free to spin on an axis through the center of one face. A massless pulley on thi
A dentist uses a mirror to examine a tooth that is 0.75 cm in front of the mirror. The image of the tooth is formed 14.0 cm behind the mirror. Determine the magnification of
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