Suppose that you measure the position of a chair using a meter stick and you record the distance of the center of the seat from the wall. Which of the following measurements is the most reasonable?

1.1.043 860 564 2 m
2.1.043 860 m
3.1 m
4.1.04 m


4

Physics & Space Science

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If a 20 W laser beam, which has an initial diameter of 2.0 mm, spreads out to a diameter of 2.0 m after traveling 10,000 m, what is the initial intensity of the beam?

a.
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A component in an automobile 12-V electrical system has a resistance of 90 ?. How much current is in the component when in operation?

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