What kind of surface features may result from tectonics?
A) mountains
B) valleys
C) volcanos
D) cliffs
E) all of the above
E
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If the red shift of a quasar were 3, at what wavelength would the 486.1 nm line of hydrogen appear in the quasar's spectrum?
What will be an ideal response?
Kepler's second law of planetary motion states that the orbits of the planets are ellipses with the Sun at one focus
a. True b. False Indicate whether the statement is true or false
An ancient building was known to have been built 3 000 years ago. Approximately what proportion of Carbon-14 atoms are yet in the building's wooden framing compared to the number which were present at the time of its construction? (half life of 14C = 5 730 years)
a. 0.425 b. 0.500 c. 0.517 d. 0.696
Siddhartha saved up money from his summer job to buy a powerful home theater system. When shopping for the best buy in a home theater system the sales representative informs Siddhartha that the more expensive models are worth the money because they ____.
A) amplify sound up to 160 dB B) boost frequencies below 80 Hz C) buffer sounds that reach 60 dB D) filter out frequencies below 10000 Hz