Instructions: On occasion, the notation 
will be a shorthand notation for 
.
If vector
is added to vector , the result is 
. If is subtracted from 
, the result is 
. What is the direction of (to the nearest degree)?
A. 225°
B. 221°
C. 230°
D. 236°
E. 206°
Answer: B
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Global temperature variations on Earth driven by the Milankovitch cycle differ from those driven by the anthropogenic greenhouse effect in that
a. they are very small in magnitude, less than 1°C. b. they occur at irregular time intervals. c. they are driven by volcanic activity. d. they occur over much longer time scales (thousands of years). e. they are driven by emissions of methane gas rather than carbon dioxide.
Increasing the temperature of a blackbody by a factor of 3 will increase its energy by a factor of
A) 3. B) 6. C) 9. D) 12. E) 81.
A radioactive isotope that emits an alpha particle will change in what respect?
a. Atomic number decreases by four. b. Both choices a and b are valid. c. Mass number decreases by four. d. None of these choices are valid.
The specific heat of an ideal gas at constant pressure is greater than the specific heat of an ideal gas at constant volume because
a. work is done by a gas at constant pressure. b. work is done by a gas at constant volume. c. no work is done by a gas at constant pressure. d. the temperature remains constant for a gas at constant pressure. e. the temperature remains constant for a gas at constant volume.