When two point charges are 2.0 cm apart, each one experiences a 1.0-N electric force due to the other charge. If they are moved to a new separation of 8.0 cm, the electric force on each of them is closest to
A) 16 N. B) 0.063 N. C) 1.0 N. D) 4.0 N. E) 0.25 N.
B
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Steven Weinberg, Abdus Salam, and Sheldon Glashow shared the 1979 Nobel Prize in physics for their development of a(n)
a. electroweak theory. b. GUT. c. quark theory. d. generalized theory of relativity. e. theory of strangeness.
The reason that you would use a ramp to carry a weight to the top of a platform, rather than lifting it up a ladder, is because the
a. force exerted would be less b. work done would be less c. power expended would be less d. gain in potential energy would be more
When light is totally polarized by reflection at an interface between two materials where the index of refraction for the incident medium is n1 and for the other is n2, the incident angle is given by 
= tan-1(n2/n1). This equation holds
A. only when n2 > n1. B. only when n1> n2. C. only when n2> n1+ 1. D. only when n2< n1+ 1. E. for all values of n1 and n2
Modern scientific theories are NOT
A) testable. B) continuously tested. C) simple. D) perfect. E) elegant.