The advantage of a fusion reactor when compared to a fission reactor is which of the following?
a. The fuel is cheaper.
b. There is less radioactive waste material.
c. Both choices above are valid.
d. None of the above choices are valid.
c
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The electric field in the region defined by the y-z plane and the positive x axis is given by E = ax, where a is a constant. (There is no field for negative values of x.) As x increases in magnitude, relative to V = 0 at the origin, the electric potential in the region defined above is
A. a decreasing function proportional to ?|x2|. B. a decreasing function proportional to ?|x|. C. constant. D. an increasing function proportional to +|x|. E. an increasing function proportional to +|x2|.
The resolving power of a telescope is ____
a. a measure of the minimum angular separation that can be seen with the telescope. b. a measure of the maximum angular separation that can be seen with the telescope. c. a measure of the amount of light that the telescope can gather in one second. d. the separation between the objective and the image. e. a measure of how blurry object appear in the telescope.
A car is moving with a constant acceleration. At time t = 5.0 s its velocity is 8.0 m/s in the forward direction, and at time t = 8.0 s its velocity is 12.0 m/s forward. What is the distance traveled in that interval of time?
A) 40 m B) 30 m C) 20 m D) 50 m E) 10 m
A 500-kg elevator is pulled upward with a constant force of 5500 N for a distance of 50.0 m
(a) What is the work done by the 5500-N force? (b) What is the work done by gravity? (c) What is the net work done on the elevator? What will be an ideal response?