A car travels along eastward with a constant velocity. The magnitude of the acceleration of the car is
A) decreasing.
B) increasing.
C) non-zero constant.
D) zero.
E) None of the other choices is correct.
D
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No object produces a perfect thermal radiation spectrum, but many objects produce close approximations. Which of the following would not produce a close approximation to a thermal radiation spectrum?
A) a hot, thin (low-density, nearly transparent) gas B) a filament in a standard (incandescent) light bulb C) a star D) you
All elements heavier than iron are made during supernova explosions
Indicate whether the statement is true or false
The sub-atomic particle known as the "neutrino" was originally hypothesized
A) because it was thought that radiant energy is actually a form of energy. B) in order to preserve conservation of electric charge in a certain type of nuclear process. C) in order to preserve Newton's laws in a certain type of nuclear process. D) because it was thought that thermal energy (or heat) is actually a form of energy. E) in order to preserve the law of conservation of energy in a certain type of nuclear process.
A nucleus of radium-223 undergoes alpha decay. (a) Write the reaction equation and (b) determine the identity of the daughter nucleus