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
A
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The stride of a horse would be quicker if more mass in its legs were concentrated
A) in the upper part, nearer the horse's body. B) towards its feet. C) halfway up its legs. D) uniformly all along its legs. E) none of the above
Estimate how many pennies you would have to stack to reach from the floor to an average 8-ft ceiling
A) 2 × 103 B) 2 × 102 C) 2 × 104 D) 2 × 105 E) 2 x 106
When a ball rises vertically to a height h and returns to its original point of projection, the work done by the gravitational force is
a. 0. b. ?mgh. c. +mgh. d. ?2mgh. e. +2mgh.
Two long straight parallel wires separated by a distance of 20 cm carry currents of 30 A and 40 A in opposite directions. What is the magnitude of the resulting magnetic field at a point that is 15 cm from the wire carrying the 30-A current and 25 cm from the other wire?
a. 51 mT b. 33 mT c. 72 mT d. 64 mT e. 46 mT