Compared with the current in the primary coil of a transformer, the current in the secondary coil
A) is greater.
B) is less.
C) can be greater or less.
D) none of the above
Answer: C
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Compared to a cluster containing type O and B stars, a cluster with only type F and cooler stars will be:
A) younger. B) older. C) further away. D) more obscured by dust. E) less obscured by dust.
If the Sun were twice as massive
A) its pull on the Earth would double. B) Earth's pull on the Sun would double. C) both of these D) none of the above
If the maximum possible accuracy in measuring the velocity of a particle increases, the maximum possible accuracy in measuring its position will
A) increase. B) decrease. C) not be affected.
At what speed will a car round a 125 m radius curve, banked at a 45° angle, if no friction is required between the road and tires to prevent the car from slipping? (g = 9.8 m/s2)
a. 27 m/s c. 23 m/s b. 17 m/s d. 35 m/s