Different name for concentric circles?
Answer: A
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Friction: You push horizontally on a 120-N box that is initially resting on a horizontal table. The coefficient of static friction between the box and the table is 0.75, and the coefficient of kinetic friction is 0.40. Find the friction force on the box if the push is equal to (a) 84 N; (b) 94 N.
Fill in the blank(s) with the appropriate word(s).
What happens to the surface temperature and luminosity when gravity first assembles a protostar from a collapsing cloud?
A) Its surface temperature and luminosity increase. B) Its surface temperature remains the same and its luminosity decreases. C) Its surface temperature and luminosity decrease. D) Its surface temperature decreases and its luminosity increases. E) Its surface temperature and luminosity remain the same.
Two forces act on a 6.00-kg object. One of the forces is 11.0 N. If the object accelerates at 2.00 m/s2, what is the greatest possible magnitude of the other force?
a. 33.0 N c. 3.0 N b. 23.0 N d. 1.0 N
If the temperature T of an ideal gas is increased at constant pressure the mean free path:
A. decreases in proportion to 1/T B. decreases in proportion to 1/T2 C. increases in proportion to T D. increases in proportion to T2 E. does not change