A gamma ray is another name for a(n)
a. electron.
b. proton.
c. neutron.
d. helium nucleus.
e. photon.
e
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In addition to having the phase of the Moon be full what is the other condition that must be fulfilled to have a lunar eclipse?
A. The Sun must be at the vernal equinox. B. The Sun must be at the summer solstice. C. The vernal equinox must be on the ecliptic. D. The line of nodes must be pointing towards the Sun.
Galileo observed which of the following phases of Venus?
A) full B) new C) crescent D) gibbous E) all of the above
An iPod is 20 cm in front of a flat mirror. You see the reflected image and must refocus your eye, perhaps even take off your eyeglasses, because
A. the image location is 20 cm behind the mirror. B. the image is inverted but virtual. C. your retina has a different curvature than the flat mirror. D. the flat mirror replaces the object in a random direction.
The parallax angle of the Sun is 1 arc second
a. True b. False Indicate whether the statement is true or false