Which one of the phrases below is the current explanation of why the surface of Venus is so hot?
a. Venus's poor reflectivity
b. the action of the greenhouse effect caused by carbon dioxide
c. always keeping the same face turned toward the Sun
d. the action of the greenhouse effect caused by hydrogen
b
You might also like to view...
The coronal gas in the interstellar medium has very high temperatures similar to the Sun's corona
a. True b. False Indicate whether the statement is true or false
If two copper wires of the same length have different thickness, then the thicker wire has
A) more resistance. B) less resistance. C) both the same
You push horizontally on a 120-N box that is initially resting on a horizontal table. The coefficient of static friction between the box and the table is 0.75, and the coefficient of kinetic friction is 0.40
Find the friction force on the box if the push is equal to (a) 84 N; (b) 94 N.
Because we know that the half-lives of many radioactive isotopes are millions of years, we can deduce that
a. the longer it exists the more radioactive nuclei Earth produces. b. the sun is the source of all the radioactive nuclei on Earth. c. there must have been many more radioactive nuclei on Earth when life began. d. there must have been far fewer radioactive nuclei on Earth before life began. e. the natural radioactivity of minerals on the Earth was created by the Earth's internal temperature.