If Venus' clouds block much of the sunlight before it reaches the surface, why is the planet so hot?
What will be an ideal response?
The carbon dioxide in the dense atmosphere creates a greenhouse effect. Some sunlight (and its energy) still reaches the surface and is reradiated as heat. Heat (or infrared radiation) is trapped beneath the atmosphere, causing an increase in the temperature at the surface.
You might also like to view...
Which analogy best explains why inflation predicts that the overall geometry of the observable universe should appear to be flat?
A) Earth is so big that it the part explored by an ant appears flat. B) As a balloon expands, dots that you have drawn on it become farther apart with time. C) If you stretch a wavy line infinitely, it becomes straight. D) No city on Earth is any more the "center" of Earth's surface than any other city.
Very early in his thinking about relativity, Einstein asked himself what a person would observe if he or she kept up with a lightbeam. In answer to this question, the theory of relativity states that
A) this is not a valid question because a person cannot move as fast as a lightbeam. B) the light beam would stand still and so time would stand still. C) the observer would suddenly undergo a sex change. D) the observer own would continue to observe the same laws of physics. E) time would speed up without limit, and would pass at an "infinite" rate.
A traffic flow on a freeway is very dense and it is proposed that a fluid flow could possibly simulate the flow. If it was decided to study the feasibility of the proposal, which flow would be a possibility?
(A) An incompressible flow (B) A compressible flow with M < 1 (C) A compressible flow with M > 1 (D) A compressible flow with M = 1
An airplane increases its speed at the average rate of 15 m/s2. How much time does it take to increase its speed from 100 m/s to 160 m/s?
A) 17 s B) 0.058 s C) 4.0 s D) 0.25 s