The absolute magnitude of the Sun is
A) -26.7. B) -12.1. C) 0. D) +4.8. E) +26.7.
D
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If rockets are fired from an airplane in the backward direction, the momentum of the airplane will
a. increase b. decrease c. no change d. increase then decrease e. none of above
Cart A, of mass m, starts from rest and travels in a straight line with acceleration a. It traverses a distance x in time t. Cart B, of mass 4m, starts from rest and travels in a straight line with acceleration . At time t it has traversed the distance
A.
B.
C.
D.
E.
According to the special theory of relativity, all laws of nature are the same
A) in all reference frames. B) for both linear or circular motion. C) in all uniformly moving reference frames. D) all of the above E) none of the above
The mass of 12C is 12 u, where 1 u = 1.660559 × 10^-27 kg. This mass is equal to:
a. the mass of the 12C nucleus plus 6 electrons. b. the mass of the 12C nucleus plus 12 electrons. c. the mass of the 12C nucleus. d. the mass of 6 protons and 6 neutrons.