Which statement is true?
A. Some electromagnetic waves will pass through walls that light cannot penetrate
B. Electromagnetic waves can't travel in perfect vacuum
C. Radio waves in the AM band are not electromagnetic waves
D. Speed of light in air is lower than in glass
E. In air light travels much faster than radiation from a microwave oven
Answer: A
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Which of the following describes erosion?
A) the excavation of bowl-shaped depressions by asteroids or comets striking a planet's surface B) the eruption of molten rock from a planet's interior to its surface C) the disruption of a planet's surface by internal stresses D) the wearing down or building up of geological features by wind, water, ice, and other phenomena of planetary weather
What is the equivalent resistance between points A and B in the figure when R = 18 ??
a.
48 ?
b.
64 ?
c.
80 ?
d.
96 ?
e.
110 ?
Water freezes at atmospheric pressure and a temperature of
A) 0 degrees Celsius. B) 32 degrees Fahrenheit. C) about 273 kelvin. D) all of the above E) none of the above
An aircraft undergoes a constant acceleration of 11 m/s2 for 12 seconds. The distance traveled is __________
Fill in the blank(s) with correct word