A small source radiates an electromagnetic wave with a single frequency into vacuum, equally in all directions. As the wave moves, its intensity:
1.increases.
2.decreases.
3.stays constant.
2
Physics & Space Science
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Incompressible water flows out of a large reservoir through a pipe that opens to the atmosphere 5.70 m below the level of the water in the reservoir. What is the speed of the water as it comes out of the pipe?
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In ?- decay, the number of protons in the nucleus is
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The spin quantum number can have values of
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Physics & Space Science