How does the value of 
for the loop change?
A. The quantity increases.
B. The quantity decreases.
C. The quantity remains the same.
D. One cannot determine the change from what is given.
A. The quantity increases.
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A very small 51-g steel ball is released from rest and falls vertically onto a steel plate. The ball strikes the plate and is in contact with it for 0.50 ms. The ball rebounds elastically and returns to its original height
The total time interval for a round trip is 3.00 s. What is the magnitude of the average force exerted on the ball by the plate during contact with the plate? A) 3,000 N B) 1,500 N C) 2,490 N D) 2,000 N E) 3,500 N
A 1500-W heater is connected to a 120-V line. How much heat energy does it produce in 2.0 hours?
A) 1.5 kJ B) 3.0 kJ C) 0.18 MJ D) 11 MJ E) 18 MJ
How many electrons are gained or lost in the following half-reaction?
2 Na ? 2 Na+ A) 2 electrons are lost B) 1/2 electron is gained C) 1/2 electron is lost D) 2 electrons are gained E) 4 electrons are gained
The luminosity of a star is determined by the star's ________ and ________.
A. diameter; surface temperature B. apparent brightness; surface temperature C. brightness; temperature D. distance; surface temperature E. diameter; distance