It is often possible to use the atomic masses when calculating the binding energy of a nucleus. The reason for this is
a. the electron masses do not cancel.
b. the electron masses cancel.
c. tables of nuclear masses are usually not available. d. the mass of the electron can usually be neglected when compared to the mass of the neutron.
e. the atomic masses are the same as the nuclear masses.
B
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A 1000-kg car is driving toward the north along a straight horizontal road at a speed of 20.0 m/s. The driver applies the brakes and the car comes to a rest uniformly in a distance of 200 m
What are the magnitude and direction of the net force applied to the car to bring it to rest? A) 1.00 N north B) 10.0 × 103 N south C) 1.00 × 103 N south D) 1.00 N south E) 100 N south
Two cars, each of mass 2 200 kg and traveling at 14.0 m/s, undergo a head-on completely inelastic collision. What is the change in entropy of the Universe which results from this collision? Assume the ambient temperature is 20.0°C
a. 1.47E+3 J/K b. 2.2E+4 J/K c. 7.35E+2 J/K d. 6.2E+5 J/K
The unit of inductance, the henry, is equivalent to
a. V·s/A. b. V/m. c. J/C. d. none of the units given.
You have taken a picture of a galaxy 1 billion light years away. That picture shows
A) a galaxy that is 1 billion years old. B) a galaxy that is 1 billion light years old. C) a galaxy that is 13 billion years old. D) a galaxy as it was 1 billion years ago.