0.500 moles of an ideal gas has a volume of 0.0100 
and a temperature of 300 K. What is the pressure of the sample of gas?
A. 125 kPa
B. 143 kPa
C. 157 kPa
D. 198 kPa
E. 217 kPa
A. 125 kPa
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Why do the jovian planets in our solar system bulge around their equators?
A) They are much more massive than the terrestrial planets. B) Their large systems of moons and rings gravitationally attract the mass around the equator more. C) Their rapid rotation flings the mass near the equator outward. D) Their internal heat sources exert more pressure at the equator.
The observed relationship between the masses of central black holes and the bulge masses of galaxies implies that
A) galaxy formation and supermassive black hole formation must be related. B) the black hole will eventually suck in the rest of the galaxy. C) the biggest galaxies have the most luminous quasars. D) quasars were more common 10 billion years ago than they are today.
The apparent displacement in the direction of light coming from a star because of Earth's orbital motion is called the ______________
Fill in the blank(s) with correct word
Two in-phase loudspeakers are some distance apart. They emit sound with a frequency of 536 Hz. A microphone is moved between the speakers along the line joining the two speakers with a constant speed of 1.60 m/s
What beat frequency is observed? The speed of sound in air is 343 m/s. A) 5.00 Hz B) 6.00 Hz C) 7.00 Hz D) 8.00 Hz E) 9.00 Hz