Which of the following best represents the energy transformations occurring in a coal-fired power plant?
A) thermal ? chemical ? electric
B) gravitational ? thermal ? electric
C) chemical ? electric ? thermal
D) chemical ? thermal ? electric
E) electric ? thermal ? chemical
D
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In a circuit involving resistance and capacitance, which of the following choices would result in the longest time constant?
a. R = 100 ?, C = 30 ?F b. R = 300 ?, C = 150 ?F c. R = 75 ?, C = 75 ?F d. R = 200 ?, C = 200 ?F
The size and sign of the charge on an electron is the same as that for
a. a positron. b. an antiproton. c. an antineutron. d. an antineutrino.
A block is dropped onto a vertical spring. Which net force vs. distance graph best represents the net force on the block as a function of its distance traveled? Consider only the motion of the block from the time it is dropped until it first comes to rest
Of all the stars in the sky, Barnard's star, the next closest beyond Alpha Centauri, appears to move the fastest
Indicate whether the statement is true or false