On average, a body 100 meters in diameter or larger impacts Earth every ________ years.
A. 10 million
B. 100,000
C. 1,000
D. 10,000
E. one million
Answer: D
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An athlete competing in long jump leaves the ground with a speed of 9.14 m/s at an angle of 35.0° above the horizontal. What is the length of the athlete's jump?
A) 0.876 m B) 8.01 m C) 12.0 m D) 16.8 m E) 4.01 m
(From a science quiz that appeared in the weekly magazine The Economist.) Economic history is easier to write than the history of the universe
Nevertheless, most cosmologists now think that when the universe was formed in which of the following manners? A) First there was a Big Bang, then inflation (of space) caused recession (of all matter, away from the Big Bang). B) First there was inflation, which caused the Big Bang, then recession. C) First there was a Big Bang. There has not been any inflation yet, but if it comes it will cause recession.
The colors you see with a prism result because of __________
Fill in the blank(s) with correct word
The density of a certain solid is 7.2 × 10^3 kg/m3, and its Young's modulus is 8.0 × 10^10 N/m2 . What is the speed of sound in this material?
a. 1.1 × 10^7 m/s c. 3700 m/s b. 5900 m/s d. 3300 m/s