Thermograms use ultraviolet radiation to sense heat
a. True
b. False
Indicate whether the statement is true or false
False
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For an observer on Uranus, the ecliptic passes only a few degrees from the celestial poles
a. True b. False Indicate whether the statement is true or false
Suppose you and a friend have precise clocks. You are on the ground floor of a tall building and your friend is on the roof. Which of the following statements is true?
A) You will see your friend's clock ticking faster than yours, and she will see your clock ticking slower than hers. B) You will see your friend's clock ticking faster than yours, and she will see your clock ticking faster than hers. C) You will see your friend's clock ticking slower than yours, and she will see your clock ticking slower than hers. D) You will see your friend's clock ticking slower than yours, and she will see your clock ticking faster than hers.
What is the approximate range of masses that newborn main-sequence stars can have?
A) 0.1 to 150 solar masses B) 0.001 to 1500 solar masses C) 0.1 to 1500 solar masses D) 0.001 to 10 solar masses E) 0.1 to 10 solar masses
What determines the speed of a wave traveling on a rope?
a. The speed of the initial disturbance. b. How the wave is initiated. c. The amplitude of the wave and the mass of the rope. d. The amplitude of the wave. e. The mass of the rope and the tension of the rope.