If the molecules in a tank of hydrogen have the same rms speed as the molecules in a tank of oxygen, we may be sure that:
A. the pressures are the same
B. the hydrogen is at the higher temperature
C. the hydrogen is at the greater pressure
D. the temperatures are the same
E. the oxygen is at the higher temperature
Answer: E. the oxygen is at the higher temperature
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If the movable mirror in a Michelson interferometer is moved 120 microns, how many fringes would be counted for 600 nm light?
A) 200 B) 720 C) 100 D) 300 E) 400
A double-slit experiment uses light of wavelength 633. nm with a slit separation of 0.100 mm and a screen placed 2.0 m away
(a) What is the linear width of the central fringe? (b) What is the lateral distance between 1st and 2nd order fringes? (c) What is the angular separation between the central maximum and the 1st order maximum?
The point along a planet's orbit where it is closest to the Sun is called the orbit's
A) period. B) perihelion. C) eccentricity. D) semi-major axis. E) aphelion.
The Hipparcos data give us
A) parallaxes to the nearest galaxies. B) parallaxes as small as 0.005". C) an accurate distance to the Moon. D) distances to about 100 billion stars, practically everything in the Milky Way Galaxy. E) information on only the 6,000 brightest stars.