As the number of loops in a current-carrying wire coil is increased, the magnetic field becomes
A) more spread out.
B) more stable.
C) stronger.
D) weaker.
E) none of the above
Answer: C
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You slam on the brakes of your car in a panic, and skid a certain distance on a straight, level road. If you had been traveling twice as fast, what distance would the car have skidded, under the same conditions?
A) It would have skidded 4 times farther. B) It would have skidded twice as far. C) It would have skidded times farther. D) It would have skidded half as far. E) It is impossible to tell from the information given.
Energy resulting from motion is called ______________
Fill in the blank(s) with correct word
What was the one most important event in the Precambrian?
What will be an ideal response?
A Carnot engine runs between a hot reservoir at Th and a cold reservoir at Tc. If one of the temperatures is either increased or decreased by 3.5 K, which of the following changes would increase the efficiency by the greatest amount?
a. increasing Th b. increasing Tc c. decreasing Tc d. cannot be determined from information given