Marshmallows in a vacuum become
A) larger.
B) smaller.
C) flat.
D) a hollow shell.
E) none of the above
Answer: A
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A 3. ? resistor is connected in parallel with a 6. ? resistor. This pair is then connected in series with a 4. ? resistor. These resistors are connected to a battery
What will happen if the 3. ? resistor burns out, i.e., becomes an infinite resistance? A) The current in the 4. ? resistor will drop to zero. B) The current in the 6. ? resistor will increase. C) The current provided by the battery will not change. D) The power dissipated in the circuit will increase.
If a long spring with spring constant k is cut into 3 equal lengths, what is the spring constant of each of the 3 shorter springs?
a. It is still k. c. It is k/3. b. It is 3k. d. It is k/9.
Standing at the shore of a still lake, the reflected view of scenery on the other side of the lake is the view you would see if you were upside down with your eye in the line of sight
A) where it already is. B) at the surface of the water where the light reflects. C) directly beneath you, as far below water level as you are above. D) close to the distant shore. E) none of the above
Suppose that you wish to construct a simple ac generator with an output of 12 V maximum when rotated at 60 Hz. A magnetic field of 0.050 T is available. If the area of the rotating coil is 100 cm2, how many turns are needed?
A) 8 B) 16 C) 32 D) 64 E) 128