Which terrestrial world has the strongest magnetic field?
A) Mars
B) Earth
C) the Moon
D) Venus
E) Mercury
B) Earth
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When you drag a toy teddy bear along the floor by a force that is parallel to the floor, the magnitude of the force of friction
A. is independent of velocity or acceleration. B. increases when the velocity increases. C. is proportional to the acceleration. D. decreases when the force parallel to the floor increases. E. increases when the force parallel to the floor increases.
How is the energy stored in a current-carrying inductor related to the current value, I?
a. directly proportional to I1/2 c. inversely proportional to I b. directly proportional to I2 d. directly proportional to I
Dimensional Analysis: When subtracting several quantities
A. the quantities can have any combination of units. B. the quantities must all have exactly the same units. C. the quantities must all be dimensionless.