The ____ of a gas is a measure of the average speed of the particles (atoms or molecules) in the gas
a. heat
b. composition
c. temperature
d. blue shift
e. binding energy
c
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Compared with the spectral lines in the solar spectrum, lines in a supergiant star's spectrum are
a. more narrow. b. broader. c. weaker. d. stronger. e. broader and weaker.
Vibration of an object about an equilibrium point is called simple harmonic motion when the restoring force is proportional to
A. time B. displacement C. A spring constant D. mass
Earth releases the energy it receives from the Sun by emitting _________ radiation.
a. infrared b. visible c. ultraviolet (UV) d. radio e. microwave
A steel bracket ABCD (EI 5 4.2 3 106 N # m2), with span length L 5 4.5 m and dimension a 5 2 m, is subjected to load P 5 10 kN at D. The maximum deflection at B is approximately:
(A) 10 mm
(B) 14 mm
(C) 19 mm
(D) 24 mm