Which space mission is searching for extrasolar planets using the astrometric method?
A) Kepler
B) GAIA
C) CoRoT
D) Spitzer
B
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A vertical tube one meter long is open at the top. It is filled with 75 cm of water. If the velocity of sound is 344 m/s, what will the fundamental resonant frequency be (in Hz)?
a. 3.4 b. 172 c. 344 d. 1.7 e. 688
A recurrent nova could eventually build up to a
A) Type I supernova. B) helium flash. C) Type II supernova. D) planetary nebula. E) core composed of iron.
In bombarding atomic nuclei with proton "bullets," the protons must be accelerated to high energies to make contact with the target nuclei
A) because the target nuclei are so small. B) because the target nuclei are negatively charged. C) in order to penetrate through the electrons that surround each target nucleus. D) because the target nuclei are positively charged.
Which of the following planets can be seen as a crescent phase from Earth?
a. Mercury b. Venus c. Mars d. Mercury and Venus e. All of the other choices are correct.