The rate of flow of electric charge is
a. voltage.
b. current.
c. resistance.
d. electric field.
e. critical temperature.
b
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If you stretch a copper wire so that it is thinner, the resistance between its ends
A) decreases. B) remains unchanged. C) increases.
What is found in between the particles of a gas?
A) air B) nothing C) elements D) temperature
How does Rigel, a bluish star, surface temperature compare to Betelgeuse, a reddish star.
A. Rigel's surface temperature is less than Betelgeuse's. B. Rigel's surface temperature is greater than Betelgeuse's. C. They have the same surface temperature because they are both members of the constellation Orion. D. It is impossible to say without knowledge of the sizes of the stars.
An automobile traveling along a straight road increases its speed from 30.0 m/s to 50.0 m/s in a distance of 180 m. If the acceleration is constant, how much time elapses while the auto moves this distance?
A. 6.00 s B. 4.50 s C. 3.60 s D. 4.00 s E. 9.00 s