A runner runs on a circular path of radius 10 m. What is the magnitude of the displacement of the jogger if he runs (a) half-way around the track? (b) all the way around the track?
What will be an ideal response?
(a) 20 m (b) 0 m
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The diagram below shows three approximate locations of the sun along the western horizon. Which number indicates the location of the sun at sunset on autumnal equinox for an observer at a latitude of 45° N?
a. 1
b. 2
c. 3
d. The sun will set in the east for an observer in the northern hemisphere.
e. The sun will not set on autumnal equinox at this latitude.
__________refer to rare occasions when Venus can be seen as a tiny dot directly between Earth and the Sun
A) Light pillars of Venus B) Transits of Venus C) Solar phenomena of Venus D) Meteors of Venus
The triple-alpha process
a. controls the pulsations in Cepheid variable stars. b. is the nuclear fusion of hydrogen to helium in massive stars. c. is the process that produces the neutrinos we receive from the Sun. d. requires a temperature of about 5,000,000 K to operate. e. occurs during helium flash.
A series of 3 uncharged concentric spherical conducting shells surround a small central charge q. The potential at a point outside the third shell, at distance r from the center, and relative to V = 0 at ?, is
A.
.B.
.C.
.D.
.E.
.