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Which of the choices is an example of wave propagation?
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stone sinking to the bottom of a pond
O water flowing along a stream
O truck slowing down and speeding up as it moves along a highway
row of dominoes toppling
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Two vectors are shown. which statement best compares the vectors? vector x has greater magnitude than vector y. vector y has greater magnitude than vector x. the vectors have the same displacement. the vectors have the same direction.

Ineed the answers for these promblems i have

Point charges q1 = 51 µc and q2 = −27 µc are placed 1.0 m apart, with q2 on the right. what is the force (in n) on a third charge q3 = 19 µc placed midway between q1 and q2? (assume the positive direction is to the right. indicate the direction with the sign of your answer.)