Two moles of an ideal gas fill a volume of 10 liters with a pressure of 2.4 atm. The gas is thermally insulated from the surroundings. A membrane is broken which allows the gas to expand into the new volume which is 3 times as large as the old volume. What is the new temperature?
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Light bends as it
1) passes a massive star, 2) traverses any gravitational field, 3) both of these, 4) none of these, and when emitted from a massive star, light is 5) red shifted. 6) blue shifted. 7) speeded up. 8) none of these.
The output voltage of an AC generator is of the form V = V0 sin(2?ft). A typical frequency in household circuits is 60 Hz. Using radians for angular measure in this equation, what is the factor 2?f in radians per second for this frequency?
a. 2? b. 120 c. 377 d. 60
Why do the orbits of the planets all lie in nearly the same plane?
a) Collisions between planetesimals destroyed all planetsthat would have been elsewhere. b) The Sun's gravity forced them into these orbits. c) The early solar nebula flattened into a disk. d) The angular momentum of the solar system was kept to a minimum this way. e) This happened purely by chance.
Eta Carinae is an example of a:
A) black hole. B) supermassive star. C) red dwarf. D) nebula. E) stellar nursery.