Can the temperature of an ideal gas and the internal energy of an ideal gas increase with no energy transfer by heat?
1.No, if there is no energy transfer by heat to an ideal gas, then the internal energy of the gas must stay constant and so must its temperature.
2.No, although the internal energy of the ideal gas may increase with no energy transfer by heat, the temperature of the gas will not change.
3.Yes, the temperature of an ideal gas and the internal energy of an ideal gas can increase with no energy transfer by heat.
4.No, although the temperature of the ideal gas may increase with no energy transfer by heat, the internal energy will not change.
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An intercooler of an air compressor is to use a finned flat tube heat exchanger as shown in Figure 9-29. Compressed air at 100 psia, 130ºF passes through the tubes at 100 ft/s and air at 14.7 psia, 70ºF, and 100 ft/s passes around the tubes. Determine the convective heat transfer coefficient, the friction factor for the cooling air outside the tubes, and the overall convective heat transfer coefficient for the intercooler. Assume the inside dimensions of the flattened tubes are 0.105 in by 0.865 in.
The Very Long Baseline Interferometer (VLBI)
a. is the highest resolution optical telescope ever built. b. is located in Arecibo, Puerto Rico. c. is a matched pair of 8 m telescopes, one of which is in Chile and the other in Hawaii. d. is an air-borne infrared telescope. e. is a set of radio telescopes linked together electronically to provide very high resolution.
Where groundwater discharges to a swamp, the elevation of the water table next to the swamp is
A) lower than the surface of the swamp. B) at the same elevation as the surface of the swamp. C) slightly higher than the surface of the swamp. D) Not enough information is given.
When a funnel cloud touches the ground, it becomes a
A) hurricane. B) thunderstorm. C) tornado. D) cyclone.