Daytime high temperatures generally occur:
What will be an ideal response?
about 3:00 p.m.
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According to Einstein's special theory of relativity, when compared to an identical clock at rest, a clock moving with constant velocity will run
(a) Slow (b) Fast (c) At the same rate (d) Alternately fast and slow
Alpha Centauri A and B have an average orbital separation of about 23 AU and a period of about 80 years. Approximately what is the sum of their masses? If we presume that Alpha Centauri A is a star like our Sun, what is Alpha Centauri B's mass?
What will be an ideal response?
Charge Q is distributed uniformly along a semicircle of radius a. Which formula below gives the correct magnitude of the force on a particle of charge q located at the center of the circle?
A.
.B.
.C.
.D.
.E.
.If y = 0.02 sin (30x ? 400t) (SI units) and if the mass density of the string on which the wave propagates is 0.005 kg/m, then the transmitted power is
a. 1.03 W. b. 2.13 W. c. 4.84 W. d. 5.54 W. e. 106 W.