Two soldiers are marching side by side with a speed of 1.9 m/s, but one of them moves 92 cm for each step he takes, while the other moves only 84 cm. How often are they in step?

A) every 3.2 s
B) every 8.7 s
C) every 4.6 s
D) every 5.1 s
E) every 10 s


E

Physics & Space Science

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Resistance and Resistivity: How much current will be flowing through a 57.0-m length of copper wire with radius 5.7 mm if it is connected to a source supplying 62.0 V? The resistivity of the metal is 1.68 × 10-8 ? ? m.

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An object is moving with constant non-zero velocity on the +x axis. The position versus time graph of this object is

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What might have made the original solar nebula begin to contract?

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Power is defined as the rate of work per time, power = work/time. If the dimensions of power are [ML2T-3], what are the dimensions of work?

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