Most coal has the same sulfur content, but varies widely in heat content
Indicate whether the statement is true or false
FALSE
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A parcel of air at the surface is heated, which expands the air and increases the parcel's volume. If the same number of air molecules occupy the greater volume, density decreases. The increase in volume results in lower pressure. What will happen to the air surrounding this parcel?
A) More dense air rises at the surface. B) Less dense air sinks at the surface. C) Less dense air flows in to replace the rising air. D) Denser air flows in to replace the rising air.
Minimal orbital speed for satellites circling Earth is about 8 km/s. Minimal orbital speed for a satellite orbiting Jupiter would be
A. greater than 8 km/s. B. less than 8 km/s. C. about 8 km/s.
Earth is farthest from the Sun at perihelion and closest at aphelion
Indicate whether the statement is true or false
A. 45 million pounds B. 20 million pounds C. 65 million pounds D. 5 million pounds
A. 45 million pounds B. 20 million pounds C. 65 million pounds D. 5 million pounds