The nucleus, or main solid body, of a comet has a typical size of
A) a few centimeters.
B) a few meters.
C) a few kilometers.
D) a few hundred kilometers.
E) a few thousand kilometers.
C
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One mole of an ideal gas with a volume of 4.00 liters and a temperature of 0
is mixed with one mole of an ideal gas with a volume of 2.00 liters and a temperature of 100
The volume of the mixture is 6 liters. What is the N/V of the mixture?
a. 
b. 
c. 
d. 
e. 
Explain how the central engine powers an active nucleus or quasar
What will be an ideal response?
When a car goes around a circular curve on a level road without slipping,
a. no frictional force is needed because the car simply follows the road. b. the frictional force of the road on the car increases when the car's speed decreases. c. the frictional force of the road on the car increases when the car's speed increases. d. the frictional force of the road on the car increases when the car moves to the outside of the curve. e. there is no net frictional force because the road and the car exert equal and opposite forces on each other.
In a GUT (Grand Unified Theory), what is "unified"?
A. matter and energy B. subatomic particles C. all of space D. galaxies E. the fundamental forces