What is the average temperature of the surface of the Sun?
A) 1 million K
B) 100,000 K
C) 10,000 K
D) 6,000 K
E) 1,000 K
D
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If the resultant force acting on a 2.0-kg object is equal to 
N, what is the change in kinetic energy as the object moves from 
m to
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One of the best indicators of photochemical smog is
a. CO2. b. HC. c. O3. d. NOx.
The gravitational force between two objects is proportional to
A) the distance between the two objects. B) the square of the distance between the two objects. C) the product of the masses of the two objects. D) the square of the product of the masses of the two objects. E) none of the above
A stunt pilot performs a circular dive of radius 800 m. At the bottom of the dive (point B in the figure) the pilot has a speed of 200 m/s which at that instant is increasing at a rate of 20 m/s2. What acceleration does the pilot have at point B?
?
?
a.
m/s2
b.
