The greenhouse effect is occurring because
a. the ozone layer is being depleted
b. the amount of carbon dioxide in the atmosphere is increasing
c. the ionosphere reflects low frequency radiation
d. more ultraviolet radiation is penetrating the atmosphere
e. none of the above
B
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Energy Conservation With Conservative Forces: If a spring-operated gun can shoot a pellet to a maximum height of 100 m on Earth, how high could the pellet rise if fired on the Moon, where g = 1.6 m/s2?
A. 17 m B. 160 m C. 3.6 km D. 100 m E. 610 m
We can determine proportions of body fat because:
a. body fat is denser than muscle. b. body fat is less dense than muscle. c. muscle is less dense than water. d. body fat has the same density as water. e. body fat and muscle are both less dense than water.
When an electron drops to a lower energy level in an atom,
A) the electron becomes more massive. B) the atom moves more slowly. C) light at a wavelength specific to the change in energy levels is emitted. D) the extra energy disappears.
Stars continue to form in the halo of our Galaxy today
Indicate whether the statement is true or false