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?
A) 1.72 m/s B) 7.47 m/s C) 55.8 m/s D) 10.6 m/s E) 27.9 m/s
Physics & Space Science
In ?- decay, the number of protons in the nucleus is
A) decreased by 1. B) decreased by 2. C) increased by 1. D) increased by 2. E) remains unchanged.
Physics & Space Science
What evidence do we have that large galaxies cannibalize small galaxies?
What will be an ideal response?
Physics & Space Science
The spin quantum number can have values of
A) -1/2 -1, 0, +1, +1/2 B) -1/2 -1, +1, +1/2 C) -1/2, 0, +1/2 D) -1/2, +1/2.
Physics & Space Science