If the diameter of a radar dish is doubled, what happens to its resolving power assuming that all other factors remain unchanged?
A) The resolving power quadruples.
B) The resolving power doubles.
C) The resolving power is cut in half.
D) The resolving power is reduced to one-quarter its original value.
B
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What does c2 have in common with ??
A) they are both proportionality constants B) they have similar numerical values C) they both involve different kinds of speed D) all of the above
An astronaut of mass 70 kg weighs 700 N on Earth's surface. His weight on the surface of Mars, where the acceleration due to gravity is 3.7 m/s2, would be about
A) the same as on Earth. B) 130 N. C) 260 N. D) 370 N. E) none of the above
A series LRC ac circuit has a resistance of 4.0 k?, a capacitance of 33.0 ?F, and an inductance of 23.0 H. If the frequency of the alternating current is 2.0/? kHz,
what is the phase angle between the voltage and the current? A) 23 rad B) -1.6 rad C) 1.5 rad D) 3.1 rad
The ability of a telescope to show two very close objects separately is called its ________.
A. focal length B. light-gathering power C. resolving power D. magnification