Why should the U.S. electricity transmission system be so much better connected to Canada than to Mexico?
What will be an ideal response?
Canada has a great deal of energy resources and the companies that own the
resources in Canada overlap substantially with companies owning U.S. resources. Mexico
nationalized its oil and Pemex, the Mexican monopoly oil company, is not as interested in
the U.S. market. Also, electricity use in Canada is much more like the U.S. Mexico has a
much larger proportion of poor citizens.
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A capacitor consists of a set of two parallel plates of area A separated by a distance d. The capacitor plates carry charges +Q and -Q. If the separation between the plates is doubled, the electrical energy stored in the capacitor will
A) double. B) quadruple. C) be cut in half. D) be cut in fourth. E) not change.
A Geiger counter registers a count rate of 8,000 counts per minute from a sample of a radioisotope. The count rate 24 minutes later is 1,000 counts per minute. The half life of the radioisotope is __________
Fill in the blank(s) with correct word
A tire pressure gauge reads 30 psi when the atmospheric pressure is 14 psi. The net force on 2 square inches of the tire is __________
Fill in the blank(s) with correct word
A(n) ____________________ is a subatomic particle produced in nuclear fusion that can travel through the Sun and escape to space without interacting with any particles in the Sun
Fill in the blank(s) with correct word