When water boils, its temperature increases
Indicate whether the statement is true or false
F
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The principal greenhouse gases in our present atmosphere are:
A) hydrogen and helium. B) hydrogen sulfide and carbon disulfide. C) water vapor and carbon dioxide. D) methane and ammonia. E) sulfuric acid vapor and carbon dioxide.
Ming measures a recession velocity of 2000 km/sec for a galaxy. About how far away is that galaxy if the Hubble constant is 20 km/sec/million light years? (Hint: be sure to check the units in your calculation.)
A) 100 million light years B) 100 light years C) 40 thousand light years D) 40 billion light years
The largest single-dish radio telescope is
a. suspended on cables in a valley. b. buried deep in a mine underground. c. orbiting in space. d. suspended from balloons in the upper atmosphere.
Based on models, how does Jupiter's core compare in size and mass to Earth?
A) It is about the same size and mass as Earth. B) It is about 10 times as large in both size and mass as Earth. C) It is about the same mass, but is 10 times as large in size as Earth. D) It is about the same size, but has about 10 times as much mass as Earth. E) Jupiter doesn't have a core—it is made entirely from hydrogen and helium.