Two 10¢ coins (dimes) carrying identical charges are lying 2.5 m apart on a table. If each of these coins experiences an electrostatic force of magnitude 2.0 N due to the other coin,
how large is the charge on each coin? (k = 1/4??0 = 9.0 × 109 N ? m2/C2)
A) 5.2 ?C B) 26 ?C C) 2.6 ?C D) 52 ?C E) 6.7 ?C
D
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Because of __________, ___________, and ___________, physical interstellar travel is currently impossible
Fill in the blank(s) with correct word
Thomas Young's two-source interference patterns demonstrate the
A) particle nature of light. B) wave nature of light. C) both of these D) neither of these
A 1000-kg car traveling at 70 m/s takes 3 m to stop under full braking. The same car under similar road conditions, traveling at 140 m/s, takes ______________ m to stop under full braking
a. 6 b. 1 c. 3 d. 12 e. 11
Two children start at one end of a street, the origin, run to the other end, then head back. On the way back Joan is ahead of Mike. Which statement is correct about the distances run and the displacements from the origin?
a. Joan has run a greater distance and her displacement is greater than Mike's. b. Mike has run a greater distance and his displacement is greater than Joan's. c. Joan has run a greater distance, but her displacement is less than Mike's. d. Mike has run a greater distance, but his displacement is less than Joan's. e. Mike has run a shorter distance, and his displacement is less than Joan's.