During a solar eclipse, the ________ casts a small circular shadow on the ________.
A. Sun; Moon
B. Earth; Moon
C. Moon; Sun
D. Moon; Earth
E. Earth; Sun
Answer: D
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A frictionless simple pendulum, with a small but dense 4.4-kg bob at the end and a length of 75 cm, is released from rest at an angle of 50° with the vertical
(a) To what height above its lowest point does the bob swing on the other side? (b) What is the speed of the bob at the bottom of the swing?
A coil with a self-inductance of 6 H has a constant current of 2 A flowing through it for 2 seconds. What is the emf induced in this coil?
A) 6 V B) 12 V C) 0 V D) 4 V E) 8 V
Metric System: The metric system is preferred over the British system in science for the following main reason.
A. The metric system is more precise than the British system. B. Metric quantities can be defined more accurately than the quantities in the British system. C. Metric quantities are natural whereas British quantities are invented. D. Conversions between metric quantities are especially easy because they are all related by factors of ten.
A 1.00 X 10^3 kg sports car accelerates from rest to 25.0 m/s in 7.50 s. What is the average power output of the automobile engine?
a. 20.8 kW b. 30.3 kW c. 41.7 kW d. 52.4 kW