More massive stars are _________ luminous and __________ than less massive stars, thus they pulsate _____________
a. less, smaller, faster b. more, larger, slower
c. more, larger, slower d. less, smaller, faster
c
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Of all the planets, the axial tilt and rotation period of ________ is most like our own
A) Earth B) our Moon C) Venus D) Mars E) Mercury
Alpha radiation is in fact which of the following?
a. high energy quanta c. helium nuclei b. positrons d. electrons
The two names most associated with the discovery of Pluto are
A) Adams and Leverrier. B) Herschel and Bode. C) Kuiper and Whipple. D) Lowell and Tombaugh. E) Shoemaker and Levy.
Two protons are released from rest, with only the electrostatic force acting. Which of the following statements must be true about them as they move apart? (There could be more than one correct choice.)
A) Their electric potential energy keeps increasing. B) Their kinetic energy keeps increasing. C) Their kinetic energy keeps decreasing. D) Their electric potential energy keeps decreasing. E) Their acceleration keeps decreasing.