An insulated container, filled with water, contains a thermometer and a paddle wheel. The paddle wheel can be rotated by an external source. This apparatus can be used to determine:
A. specific heat of water
B. relation between kinetic energy and absolute temperature
C. thermal conductivity of water
D. efficiency of changing work into heat
E. mechanical equivalent of heat
Answer: E. mechanical equivalent of heat
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Fusing two iron nuclei would occur with
A) absorption of energy. B) release of energy. C) neither of these
Pascal's Principle: A 500-N weight sits on the small piston of a hydraulic machine. The small piston has an area of 2.0 cm2. If the large piston has an area of 40 cm2, how much weight can the large piston support? Assume the pistons each have negligible weight.
A. 25 N B. 500 N C. 10,000 N D. 40,000 N
In the figure, a block of mass m is moving along the horizontal frictionless surface with a speed of 5.70 m/s
If the slope is 11.0° and the coefficient of kinetic friction between the block and the incline is 0.260, how far does the block travel up the incline? What will be an ideal response?
Heat is added to an ideal gas at 20.°C. If the internal energy of the gas increases by a factor of three during this process, what is the final temperature?
What will be an ideal response?