Which of the following is not a scalar quantity?
a. Kinetic energy
b. Potential energy
c. Power
d. Work
e. None of these; that is, they are all scalar quantities.
e
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As a rotating gas cloud contracts, it spins:
A) faster due to an increase in angular momentum. B) slower due to a decrease in angular momentum. C) at a constant rate. D) faster due to conservation of angular momentum. E) slower due to conservation of angular momentum.
The force of gravity is an inverse square law. This means that, if you double the distance between two large masses, the gravitational force between them _________________.
Fill in the blank(s) with the appropriate word(s).
A person pours 330 g of water at 45°C into an 855-g aluminum container with an initial temperature of 10°C. The specific heat of aluminum is 900 J/(kg ? K) and that of water is 4190 J/(kg ? K)
What is the final temperature of the system, assuming no heat is exchanged with the surroundings? A) 28°C B) 32°C C) 31°C D) 33°C E) 35°C
Energy in Capacitors: Doubling the capacitance of a capacitor that is holding a constant charge causes the energy stored in that capacitor to
A. quadruple. B. double. C. decrease to one-half. D. decrease to one-fourth.