Almost all stars are in binary systems
a. True
b. False
Indicate whether the statement is true or false
False
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Seasons on Earth are primarily caused by
A) the distance from the Earth to the Sun. B) the tilt of the Earth's rotational axis. C) the tilt of the Earth's magnetic axis. D) the precession of the Earth's rotational axis. E) the dates of the solstices and equinoxes.
Which planet is very hot because of an extreme greenhouse effect?
a) Mars b) Earth c) Venus d) Mercury e) Jupiter
A perfectly black body at 100°C emits light of intensity I that has the strongest intensity near wavelength ?. The temperature of this body is now increased to 200°C
(a) In terms of I, what is the intensity at which this hotter body radiates? (b) In terms of ?, near what wavelength does light radiated from this hotter body have the strongest intensity?
Two cars crash head on. At any given time during the crash, the magnitudes of the collision forces exerted on each car are exactly equal. This is an example of Newton's
a. first law. b. second law. c. third law. d. no law.