The average kinetic energy per molecule in an ideal gas at 0 °C is zero
What will be an ideal response?
Absolutely not. At 0 °C, the absolute temperature is 273 K. There is plenty of
kinetic energy at this temperature.
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If grand unified theories are correct, what caused inflation at the end of the GUT era?
A) Gravity was an extremely weak force at this period in time. B) Large amounts of matter and antimatter annihilated at this time. C) There wasn't enough matter present to slow down the expansion at that time. D) The universe was too small and needed to grow quickly. E) An enormous amount of energy was released when the strong force froze out (became distinct) from the GUT force.
Why is there a limit to how much compression can be counterbalanced by electron degeneracy pressure?
A) At extreme compression, the electron speeds approach the speed of light and therefore cannot increase further. B) At extreme compression, electrons are forced to stop moving, and once stopped there is nothing more they can do. C) At extreme compression, atoms are fully ionized, so electrons go free and can no longer exert pressure. D) The exclusion principle excludes electrons from exerting more pressure than the uncertainty principle would otherwise allow. E) Electrons are very small and are simply incapable of exerting much pressure.
To maximize the magnification of a refracting telescope, what lenses should you choose?
A) The objective lens should have a small focal length and the eyepiece should have a large focal length. B) The objective lens and eyepiece should both have large focal lengths. C) The objective lens and eyepiece should both have small focal lengths. D) The objective lens should have a large focal length, but it doesn't matter what the focal length of the eyepiece is. E) The objective lens should have a large focal length and the eyepiece should have a small focal length.
The sensitive dependence upon initial conditions of the evolution of some physical systems is a feature of
a. gravitation b. fractals c. air resistance d. dynamical chaos e. quantum mechanics