What provides the energy (and so light and heat) of a star?
A. Continual explosions
B. Atomic energy/nuclear reactions
C. Lots of electricity
D. Chemical reactions at the surface
E. Gravitational contraction
Ans: B. Atomic energy/nuclear reactions
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In the equation PV = NkT, the k is known as
A) Avogadro's number. B) Boltzmann's constant. C) Planck's constant. D) the spring (compressibility) constant. E) compressibility.
Which of these is NOT true about the standard model of elementary particles currently accepted by most physicists?
a. It seems to explain every relevant experiment that can be done. b. It combines two of the four basic forces into an "electroweak" interaction. c. It combines the electroweak interaction with the color interaction. d. It connects the color theory to the strong force. e. It calls for mathematical calculations that are currently impossible.
One astronomical unit, or one AU is defined as the
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