Solids that are good conductors of heat tend also to be good conductors of electricity
a. True
b. False
Indicate whether the statement is true or false
True
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Power: A battery supplies 6.0 mA to a 12-? resistor for 1.5 h. How much electric energy does this resistor dissipate in this time?
Fill in the blank(s) with the appropriate word(s).
The "close encounter hypothesis" suggested that the planets formed after a near-collision between our Sun and another star. If this hypothesis were correct, which of the following would be true?
A) Planetary systems would be very rare. B) Planetary systems would be very common. C) Most planetary systems would have their jovian planets closer to their stars and their terrestrial planets farther from their stars. D) Most planetary systems would have the same number of planets as our own. E) All planetary systems would be at least 4 billion years old.
Approximately how old are the erosion channels seen on the surface of Mars?
A) 3 billion years B) 4.6 billion years C) 1 billion years D) 500 million years
How is stepping off a curb similar to taking a ride aboard an orbiting space vehicle?
What will be an ideal response?