Gravitational lenses formed by galaxy clusters can cause the images of some quasars to appear double.
Answer the following statement true (T) or false (F)
True
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The solar energy coming to the earth by radiation is 1,340 W/m2 when the temperature of the Sun is 5800 K. If the temperature of the Sun decreased by 10.0%, then what would be the amount of solar radiation coming to the earth?
A. 879 W/m2 B. 752 W/m2 C. 667 W/m2 D. 610 W/m2 E. 578 W/m2
According to Einstein's equation, E = mc2, which of the following statements is true?
A) Mass can be turned into energy, but energy cannot be turned back into mass. B) It takes a large amount of mass to produce a small amount of energy. C) A small amount of mass can be turned into a large amount of energy. D) Mass can be turned into energy if it is accelerated to the speed of light. E) One kilogram of mass represents 1 joule of energy.
The characteristic rotational energy, h2/8?2I, for O2 is 2.9 × 10-23 J. Calculate the O2 bond length
A) 3.6 × 10-10 m B) 0.60 × 10-11 m C) 1.2 × 10-10 m D) 0.30 × 10-11 m E) 2.4 × 10-10 m
A rock is rolled in the sand. It starts at 5.0 m/s, moves in a straight line for a distance of 6.0 m, and then stops. What is the magnitude of the average acceleration?
a. 2.1 m/s2 c. 5.4 m/s2 b. 4.2 m/s2 d. 6.2 m/s2