Multiple the equation for linear momentum by radial distance r and you have
A) rotational kinetic energy.
B) angular momentum.
C) rotational inertia.
Answer: B
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The moon ________ may have erupted to create the E rings around Saturn
Fill in the blank(s) with correct word
If the efficiency of a Carnot engine were to be 100%, the heat sink would have to be
A) infinitely hot. B) at 0°C. C) at absolute zero. D) at 100°C.
If you double the frequency of the light in a laser beam, but keep the number of photons per second in the beam fixed, which of the following statements are correct? (There could be more than one correct choice.)
A) The power in the beam does not change. B) The energy of individual photons doubles. C) The energy of individual photons does not change. D) The intensity of the beam doubles. E) The wavelength of the individual photons doubles.
A group of one hundred to a few thousand stars in a region of 25 pc in diameter that were created at the same time and our bound together by gravity is called a(n) ____
a. associated cluster b. open cluster c. closed cluster d. globular cluster e. nebular cluster