A metal rod of length L in a region of space where a constant magnetic field points into the page rotates clockwise about an axis through its center at constant angular velocity ?. While it rotates, the point(s) at highest potential is(are)
a.
A.
b.
B.
c.
C.
d.
D.
e.
A and E.
e
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When we look at the farthest galaxies in the Hubble Ultra Deep Field we can see their light from:
A.) About 12 or 13 billion years ago. B.) About 4.5 billion years ago. C.) About 1 or 2 billion years ago. D.) About 4 million years ago.
The polar caps and dust storms of Mars can be seen with Earth-based amateur telescopes
Indicate whether the statement is true or false
A "short circuit" is best described as
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A Hydrogen atom is excited to the n = 11 level. Its decay to the n = 7 level is detected in a photographic plate. What is the wavelength of the detected emission?
A) 7,510 nm B) 4,670 nm C) 12,400 nm D) 4,380 nm