The ideal shape for the primary mirror of a telescope is __________
Fill in the blank(s) with correct word
concave parabolic
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Which is not an example of approximate simple harmonic motion?
a. A ball bouncing on the floor. b. A child swinging on a swing. c. A piano string that has been struck. d. A car's radio antenna as it waves back and forth.
The light blue ellipse represents tidal bulges. In what way are these bulges drawn inaccurately?
A) There should be only one bulge rather than two. B) They should be aligned with the Sun rather than the Moon. C) They should be much smaller compared to Earth. D) They should be more pointy in shape.
Detailed measurements of the disk and central bulge region of our Galaxy suggest our Milky Way is a:
A) normal spiral galaxy. B) barred spiral galaxy. C) very flat elliptical galaxy. D) very dusty irregular galaxy. E) quasar.
A model for combining the electromagnetic, weak and strong nuclear interactions into a single basic force is a(n)
a. electroweak theory. b. GUT. c. quark theory. d. generalized theory of relativity. e. theory of strangeness.