One mole of an ideal gas has a temperature of 25°C. If the volume is held constant and the pressure is doubled, the final temperature (in °C) will be
a. 174
b. 596
c. 50
d. 323
e. 25
d
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Exclusion Principle: In a hydrogen atom, a given electron has n = 7. How many possible values can ? have?
A. 6 B. 7 C. 15 D. 98
Suppose you are sitting at the origin of an inertial reference frame. You see (that is, you receive the light from) an event E occurring near a clock at x = -30 ns at a time t = 80 ns. When do you observe that event to occur?
A. tE = 0 B. tE = 30 ns C. tE = 50 ns D. tE = 80 ns, of course E. tE = 110 ns F. Some other time (specify)
A 2.0-m2 Thermopane window is constructed, using two layers of glass 4.0 mm thick, separated by an air space of 5.0 mm. If the temperature difference is 20°C from the inside of the house to the outside air, what is the rate of heat flow through this window? (Thermal conductivity for glass is 0.84 W / m •°C and for air 0.0234 W / m •°C.)
a. 7700 W c. 180 W b. 90 W d. 550 W
_________ is absorbed by water in Earth's atmosphere and requires that telescopes for observing at these wavelengths be placed on mountain tops or in space
a. Infrared radiation b. Ultraviolet radiation c. Radio wave radiation d. X-ray radiation e. Visible light