A piece of pizza is normally a net radiator of energy when its temperature is
A) higher than its surroundings.
B) lower than its surroundings.
C) neither of these
Answer: A
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What is maximum number 150 W light bulbs that can run on a 130 V circuit protected by a 20 amp circuit breaker?
A. 18 B. 16 C. 17 D. 15
The ____________________ is the point on the celestial sphere directly above an observer, regardless of where the observer is located on Earth
Fill in the blank(s) with correct word
The region around Earth where the magnetic field traps charged particles is the
A) ozone layer. B) exosphere. C) Van Allen Radiation Belts. D) corona. E) aurora borealis and australis.
Two loops of wire are arranged so that a changing current in one, the primary, will induce a current in the other, the secondary. The secondary loop has twice as many turns as the primary loop. As long as the current in the primary is steady at 6 A, the current in the secondary will be:
a. 3 A. c. 6 A. b. 1.5 A. d. zero.