The most abundant molecule in molecular clouds is
A) H2.
B) He2.
C) CO.
D) H2O.
E) HHe.
A
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According to modern science, what was the approximate chemical composition of the solar nebula?
A) 50% hydrogen and helium, 50% everything else B) 98% hydrogen and helium, 2% everything else C) 98% hydrogen, 2% helium D) roughly equal proportions of hydrogen, helium, water, and methane
What is the relativistic momentum of a 0.456-kg rest mass moving at 1.20 × 108 m/s?
A) 5.47 × 107 kg?m/s B) 5.57 × 107 kg?m/s C) 5.67 × 107 kg?m/s D) 5.87 × 107 kg?m/s E) 5.97 × 107 kg?m/s
A lens of focal length 45 mm is used as a magnifier. The object being viewed is 6.8 mm long, and is positioned at the focal point of the lens. The lens is moved closer to the object, so that the image is now 25 cm from the lens
The distance the lens has been moved, in cm, is closest to: A) 0.69 B) 0.76 C) 0.62 D) 0.55 E) 0.48
Why Bode's law was never considered a law of physics?
a. Because it is not testable. b. Because it is not consistent. c. Because it turned out not to be true. d. Because it had no scientific basis. e. Because it wasn't invented by Bode.