Which planet has the most moons?
a) Earth
b) Mercury
c) Saturn
d) Mars
e) Venus
Ans: c) Saturn
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Energy and Momentum: In a certain nuclear reactor, neutrons suddenly collide with deuterons, which have twice the mass of neutrons. In a head-on elastic collision with a stationary deuteron, what fraction of the initial kinetic energy of a neutron is transferred to the deuteron?
A. 1/2 B. 1/3 C. 3/4 D. 5/6 E. 8/9
Which of these upcoming observations will help test the idea that Mars' atmosphere thinned due to interactions with the solar wind?
A) Astronomers will use spectrographs on the Keck telescope to measure the density of Mars' atmosphere. B) The upcoming MAVEN orbiter will measure present-day gas loss from Mars' atmosphere. C) Geologists will measure the carbon content of Martian rocks that were transported to Earth by asteroid impacts. D) The Curiosity rover will measure the carbon content of rocks on Mars' surface.
If the intensity level by 15 identical engines in a garage is 100 dB, what is the intensity level generated by each one of these engines?
A) 67 dB B) 13 dB C) 44 dB D) 88 dB
A tire pressure gauge reads 30 psi when the atmospheric pressure is 14 psi. The net force on 2 square inches of the tire is 60 lbs
Indicate whether the statement is true or false