The first to be credited for assigning the terms positive and negative to electricity was
A) William Crookes.
B) J.J. Thomson.
C) Robert Millikan.
D) Benjamin Franklin.
E) none of the above
Answer: D
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You are given three radioactive samples (?, ?, and ?) and can only dispose of one. The other two you must keep, one in your hand, the other in your pocket. How would you minimize your exposure risk?
A) keep ? in hand, keep ? in pocket, and dispose of ? B) dispose of ?, keep ? in hand, and keep ? in pocket C) dispose of ?, keep ? in pocket and keep ? in hand D) keep ? in pocket, dispose of ?, and keep ? in hand E) keep ? in hand, dispose of ?, and keep ? in pocket
A waiter in a restaurant fills a pitcher full of water and ice so that water would spill out if any more were added. As the ice starts to melt
a. the water level in the pitcher falls. b. the water level in the pitcher remains the same. c. water starts to flow out the spout of the pitcher. d. the pressure on the bottom of the pitcher decreases. e. the pressure on the bottom of the pitcher increases.
A resistor and a capacitor are connected in series to an ideal battery of constant terminal voltage. At the moment contact is made with the battery, the voltage across the capacitor is
A) greater than the battery's terminal voltage. B) equal to the battery's terminal voltage. C) less than the battery's terminal voltage, but greater than zero. D) zero.
In attempting to describe the atom, Bohr made a set of general assumptions. Which of the following statements is NOT a result or closely aligned with those general assumptions (the assumptions might not be quantum mechanically correct)?