Boyle's law and Charles' law each respectively assume what is held constant?
A) temperature, volume
B) temperature, pressure
C) pressure, volume
D) volume, pressure
E) volume, temperature
B
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The orbital plane of Earth about the Sun is called
the a)celestial plane. b)geocentric plane. c)ecliptic plane. d)sidereal plane.
The frequency of a generated electromagnetic wave matches the
A) field strength of the fields. B) energy of the fields. C) frequency of vibrating charges that produced it. D) frequency of domains in the magnetic part of the wave.
A reading of a tire gauge tells you that the gauge pressure in a tire is 31 lb/in2 . What is the absolute pressure in the tire? Assume that atmospheric pressure is 14 lb/in2
a. 17 lb/in2 b. 59 lb/in2 c. 45 lb/in2 d. You can't be sure since you may have nitrogen-filled tires.
You want to find a mass of a star on the main sequence of the H-R diagram. What do you need?
a. The star has to be in a visual binary. b. The star has to be in a spectroscopic binary. c. You need the star's luminosity. d. You need the star's absorption spectra.