A key step in the destruction of ozone by chlorofluorocarbons is
A) the chlorofluorocarbon molecule separates, resulting in free carbon which produces a greenhouse effect.
B) the chlorofluorocarbon molecule directly combines with atmospheric ozone.
C) carbon atoms react with ozone.
D) radiation from the sun separates chlorofluorocarbon, resulting in free chlorine.
E) radiation from the sun breaks down O3 molecules.
D
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An epicycle was used in geocentric models to explain ________.
A. Earth's circular shadow B. parallax C. retrograde motion D. eclipses E. aurora
A 5.00-kg object is initially at rest. The object is acted on by a 9.00-N force toward the east for 3.00 s. No force acts on the object for the next 4.00 s. How far has the object moved during this 7.00 s interval?
A) 8.10 m B) 29.7 m C) 53.6 m D) 21.7 m E) 16.2 m
Work-Energy Theorem: A certain car traveling at 34.0 mph skids to a stop in 29 meters from the point where the brakes were applied. In approximately what distance would the car have stopped had it been going 105.4 mph?
A. 279 m B. 158 m C. 90 m D. 51 m E. 29 m
When a body moves in a straight line with increasing speed, the net force on it must be increasing
Indicate whether the statement is true or false