We are led to believe that there were two kinds of charge because we are able to
(A) isolate them in separate containers.
(B) see two effects, attraction and repulsion.
(C) detect different weights for the same object.
(D) separate electrons and protons.
Answer: (B) see two effects, attraction and repulsion.
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Displacement: An object moves 15.0 m north and then 11.0 m south. Find both the distance it has traveled and the magnitude of its displacement.
A. 4.0 m, 26.0 m B. 26.0 m, 4.0 m C. 26.0 m, 26.0 m D. 4.0 m, 4.0 m
X-rays with an energy of 400 keV undergo Compton scattering from a target. The scattered rays are deflected at an angle of 38° relative to the direction of the incident rays.What is the kinetic energy of the recoiling electrons?
a. 56.9 J b. 51.5 J c. 34.3 J d. 13.7 J
There are three ________ of elementary particles in the standard model.
Fill in the blank(s) with the appropriate word(s).
The motion of a particle connected to a spring is described by x = 10 sin (pt). At what time (in s) is the potential energy equal to the kinetic energy?
a. 0 b. 0.25 c. 0.50 d. 0.79 e. 1.0