Compared to the volume of its nucleus, the volume of an atom is about
A) the same.
B) a thousand times greater.
C) a million times greater.
D) a billion times greater.
E) a trillion times greater.
E
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If Earth rotated about its axis completely upright, what would we fail to experience?
a. holidays b. seasons c. weather d. day and night e. a 365 day year
Which of the following statements applies in the final moments of the life of high-mass stars?
A. Around their cores, they have a series of nested shells, each made of a heavier element than the one surrounding it. B. The core temperature is about 2 billion degrees. C. Their outer layer is mainly hydrogen and helium. D. They have iron cores. E. All of these choices are correct.
If a string of length L, fixed at both ends, is made to resonate at its lowest possible frequency, what is the wavelength associated with that resonance?
A. L B. 2L C. L/2 D. 0.707L E. 1.414L
Consider a situation where you exert a force F on a crate of mass m, moving it at a speed v a distance d across a floor in a time interval t. The potential energy of the crate is __________
Fill in the blank(s) with correct word