A bow wave is produced when a speed boat moves
A) nearly as fast as the waves it produces.
B) as fast as the waves it produces.
C) faster than the waves it produces.
D) none of the above
Answer: C
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Other planetary systems are best detected by the Doppler shifts that change the pattern of the star's ______________
Fill in the blank(s) with correct word
Compare the rotation of the stars and the spiral density wave pattern in our Galaxy. How is it observed?
What will be an ideal response?
The parallax of two stars is reported in a star catalog. Which star is farther?
A) The one with the larger amount of parallax B) You can't tell, since parallax has nothing to do with distance. C) The one with the smaller amount of parallax
When a hydrogen atom absorbs a photon that raises it to the n = 5 state, how many different energies are possible for the photon(s) that may be emitted as the atom eventually returns to the ground state?
a. 4 b. 5 c. 6 d. 10 e. The correct answer is not given.