A rain cloud contains 2.66 × 10^7 kg of water vapor. How long would it take for a 2.0 kW pump to lift the same amount of water to an altitude of 2 000 m?
8.26 years
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Even if the Universe has no edge, it has a center
a. True b. False Indicate whether the statement is true or false
General Questions: Bill and his daughter Susan are both standing on identical skateboards (with really good frictionless ball bearings), initially at rest. Bill weighs three times as much as Susan. Bill pushes horizontally on Susan's back, causing Susan to start moving away from Bill. Just after Bill stops pushing,
A. Susan and Bill are moving away from each other, and Susan's speed is three times that of Bill. B. Susan is moving away from Bill, and Bill is stationary. C. Susan and Bill are moving away from each other, with equal speeds. D. Susan and Bill are moving away from each other, and Susan's speed is one-third that of Bill.
We can describe the position of an object in our local sky by stating its
A) altitude and meridian. B) altitude and direction. C) latitude and direction. D) latitude and longitude. E) meridian and longitude.
If 150 kcal of thermal energy raises the temperature of 2.0 kg of a material by 400 F°, what is the specific heat capacity of the material?
A) 1.35 kcal/kg ? C° B) 0.75 kcal/kg ? C° C) 0.34 kcal/kg ? C° D) 0.19 kcal/kg ? C°