An ideal monatomic gas undergoes a reversible expansion to 1.5 times its original volume. In which of these processes does the gas perform the least amount of work?
A) at constant pressure
B) if the pressure increases in proportion to the volume
C) if the pressure decreases in proportion to the volume
D) at constant temperature
E) adiabatically
E
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The lowest energy level in an atom is
a. the absolute zero temperature. b. the ground state. c. the ionization level. d. responsible for Doppler shifts. e. the energy level from which the Paschen series of hydrogen originates.
A 200-volt battery is connected to a 0.50-microfarad parallel-plate, air-filled capacitor. Now the battery is disconnected, with care taken not to discharge the plates. Some Pyrex glass is then inserted between the plates, completely filling up the space. What is the final potential difference between the plates? (The dielectric constant for Pyrex is ? = 5.6.)
What will be an ideal response?
Standing Waves on a String: A stretched string is observed to have four equal segments in a standing wave driven at a frequency of 480 Hz. What driving frequency will set up a standing wave with five equal segments?
A. 600 Hz B. 360 Hz C. 240 Hz D. 120 Hz
During the course of a single night, a planet that is moving in retrograde motion will move
A. east to west. B. not at all. C. west to east. D. randomly about the sky.