You shout at a cliff, and hear your echo in 2 seconds. If the speed of sound in the air is 340 m/s, the distance of the cliff from you is __________

Fill in the blank(s) with correct word


340 m

Physics & Space Science

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A car moving at a steady 10 m/s on a level highway encounters a depression that has a circular cross-section with a radius of 30 m. The car maintains its speed as it drives through the depression

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Which best describes the surface of Callisto?

a. dark and dirty ice, heavily pocked with craters b. old and dark on some portion, but cratered with a young bright grooved terrain c. icy crust free of craters with a liquid water ocean beneath d. covered in active sulfur-based volcanoes e. mostly water ice mixed with methane

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The first mate of a pirate ship shoots the noonday Sun with a sextant and measures the altitude to be 50o to the south on December 21 . The time on the ship's clock is 4 P.M. (GMT). What are the longitude and latitude of the ship?

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How long does it take for Earth to revolve around the Sun?

A) one day B) one week C) one month D) one year

Physics & Space Science