Would water molecules in Venus's atmosphere, whose temperature is 740 K, eventually es-cape into outer space? Note that a water molecule has a mass that is 18 times that of a hy-drogen atom. The escape velocity of Venus is 10 km/s. For comparison, a hydrogen atom has an average velocity of 2.5 km/s at a temperature of 300 K.
a. No, the average velocity of water molecules is 0.9 km/s.
b. Yes, the average velocity of water molecules is 0.9 km/s.
c. Yes, the average velocity of water molecules is 2.1 km/s.
d. No, the average velocity of water molecules is 2.1 km/s.
e. Yes, the average velocity of water molecules is 19 km/s.
a. No, the average velocity of water molecules is 0.9 km/s.
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The position of a 0.700-kg mass undergoing simple harmonic motion is given by x = (0.160 m) cos (?t/16). What is its position at t = 5.80 s?
a. –0.0670 m b. 0.0622 m c. 6.25 m d. 0.0670 m e. 0.610 m
Fiber optics in a DVD player contain their light by employing total internal reflection. Designers surround the pure glass core with another type of glass, called cladding, that has a different index of refraction from the core.
How should you select a cladding?
A. Cladding must have a larger index of refraction than the core B. Cladding must have a smaller index of refraction than the core
LMC X-3 is a binary system that is believed to contain a black hole
a. True b. False Indicate whether the statement is true or false
Which two factors are critical to the existence of the carbon dioxide (CO2) cycle on Earth?
A) plate tectonics and liquid water oceans B) life and atmospheric oxygen C) life and active volcanism D) active volcanism and active tectonics