Our solar system is located about 27,000 light-years from the galactic center. About how far does our solar system travel in one orbit?
A) 54,000 light-years
B) 85,000 light-years
C) 100,000 light-years
D) 170,000 light-years
D) 170,000 light-years
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Design a nickel
Air at 100ºF, 70% relative humidity is to be conditioned to 75ºF and 60% relative humidity. Determine the partial pressure of the water vapor in the air at both states, the amount of water removed per lbm of dry air, and the lowest temperature to which the air must be cooled to accomplish this conditioning process.
What will be an ideal response?
In this photo, the left side of a ceramic dish is ice-cold while the right side is very hot. What property of a ceramic, at the atomic/molecular level, would make it a poor heat conductor compared with a copper dish?
a. Ceramics fall apart at high temperatures. b. Only colliding and vibrating atoms transfer their motion to each other and cause conduction. c. The electrons in the ceramic, which is an electrical insulator, are not as free to move over large distances to help transfer thermal energy. d. Only electrons that conduct electric current can transfer energy and cause heat conduction. e. Only metals conduct heat.
When a liquid boils, the increase in volume is typically a factor of
A. 10 B. 100 c. 1000 D. 1,000,000