The basic function of the electric generator is which of the following conversion processes?
a. alternating current to direct
c. low voltage to high or vice versa
b. electrical energy to mechanical
d. mechanical energy to electrical
D
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Which of the following is not considered to be one of the four fundamental forces?
A) the gravity force B) the meson force C) the weak nuclear force D) the strong nuclear force E) the electromagnetic force
In a typical transmission line, the current I is very small and the voltage V is very large. A unit length of line has resistance R. For a power line that supplies power to 10,000 households, we can conclude that
A. IV = I 2R. B. I = V/R. C. IVI 2R. E. I 2R = 0.
The half-life of a muon is 2.20 ms as measured in a stationary reference frame. What is the half life of the muon (in ms) when it is moving with a speed of v = 0.800 c?
a. 8.13 b. 2.75 c. 3.67 d. 15.8 e. 1.32
Consider the hypothetical discovery from Part A reading: "A star's 5 terrestrial planets orbit in the opposite direction of its 3 jovian planets." This discovery would be inconsistent with the nebular theory because the theory holds that __________.
a. terrestrial planets should orbit in a different plane from the plane of the jovian planets b. all the planets formed in a rotating, disk-shaped nebula c. star systems should have equal numbers of terrestrial and jovian planets