If you connect two identical storage batteries together in series ("+" to "-"), and place them in a circuit, the combination will provide
A) zero volts.
B) the same voltage, and different currents will flow through each.
C) twice the voltage, and the same current will flow through each.
D) the same voltage and the same current will flow through each.
E) twice the voltage, and different currents will flow through each.
C
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Mesons consist of
A) quark-antiquark pairs. B) triple gluons. C) lepton-antilepton pairs. D) lepton-quark pairs.
The planet Mercury
a. has retrograde motion. b. is the closest planet to Venus. c. is the smallest of the terrestrial planets. d. has a uniquely circular orbit.
The planet COROT-14b is only slightly larger than Jupiter, but is several times more massive. Which is the most plausible explanation for its similar size to Jupiter?
A) Planets that are close to a star are heated up and therefore larger. B) The mass measurement is mistaken, and it is actually about 10 times more massive than Jupiter. C) It is made of elements other than hydrogen and helium which do not compress under their own gravity. D) The hydrogen and helium gas compressed even under their own gravity to a higher density than Jupiter.
Which of the following is not true about potential energy?
a. Potential energy is stored energy. b. Potential energy is related to position. c. Potential energy is a scalar quantity. d. Potential energy has direction.