You are holding on to one end of a long string that is fastened to a rigid steel light pole. After producing a wave pulse that was 5 mm high and 4 cm wide, you want to produce a pulse that is 6 cm wide but still 5 mm high. You must move your hand up and down once,
a. the same distance up as before, but take a shorter time. b. the same distance up as before, but take a longer time. c. a smaller distance up, but take a shorter time. d. a greater distance up, but take a longer time. e. a greater distance up, but take the same time.
B
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Which two geological processes appear to have been most important in shaping the present surface of Venus?
A) impacts and volcanoes B) impacts and tectonics C) tectonics and erosion D) volcanoes and tectonics E) volcanoes and erosion
What proportion of their lives do stars spend fusing hydrogen to helium in their cores?
A) 90% B) 70% C) 50% D) 10%
Suppose that an object is moving with constant acceleration. Which of the following is an accurate statement concerning its motion?
A) In equal times its speed increases by equal amounts. B) In equal times its velocity changes by equal amounts. C) In equal times it moves equal distances.
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