If we observe one edge of a star to be redshifted and the opposite edge to be blueshifted, what can we conclude about the star?
A) The star is actually two bodies, one moving toward us, the other away from us.
B) The star is in the process of falling apart.
C) The star is in the process of formation.
D) The star is rotating.
E) The star's surface is very different from one side to the other.
D
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A fireman, 40.0 m away from a burning building, directs a stream of water from a fire hose at an angle of 30.0° above the horizontal. If the initial speed of the stream is 40.0 m/s, at what height above the nozzle will the stream of water strike the building?
a. 9.60 m c. 18.7 m b. 16.6 m d. 22.4 m
Most of the neutrinos given off by the Sun are changing form in the eight minutes before they reach us
Indicate whether the statement is true or false
A proton moving at 5.0 × 104 m/s horizontally enters a region where a magnetic field of 0.12 T is present, directed vertically downward. What magnitude force acts on the proton due to this field?
(e = 1.60 × 10-19 C) What will be an ideal response?
Consider a plot of the displacement (x) vs. applied force (F) for an ideal elastic spring. The slope of the curve would be
A) the spring constant. B) the reciprocal of the spring constant. C) the acceleration of gravity. D) the reciprocal of the acceleration of gravity. E) the reciprocal of the displacement.