Without the ozone layer, life on Earth would be in danger from increased levels of _________ radiation.
a. UV
b. X-ray
c. gamma ray
d. infrared
e. microwave
a. UV
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Two large, flat, horizontally oriented plates are parallel to each other, a distance d apart
Half way between the two plates the electric field has magnitude E. If the separation of the plates is reduced to d/2 what is the magnitude of the electric field half way between the plates? A) 4E B) 2E C) E D) 0 E) E/2
From Earth, due to their motions and the fact that the Sun lights only a portion of each surface, both Mercury and the Moon:
A) always look full from Earth. B) appear to go through phases. C) pass through Earth's shadow. D) appear to be half-lit by the Sun. E) always have the same side facing Earth.
How much energy would be released if 2.0 kg of material was lost during a reaction? (c = 3.0 × 108 m/s)
A) 4.7 × 10-8 J B) 1.5 × 1016 J C) 6.0 × 108 J D) 1.8 × 1017 J
A circular loop of wire of area 25 cm2 lies in the plane of the paper. An increasing magnetic field B is coming out of the paper. What is the direction of the induced current in the loop?
A) There is no current. B) counterclockwise then clockwise C) clockwise then counterclockwise D) clockwise E) counterclockwise