Click on the first tab at the top of the interactive figure (labeled "The Greenhouse Effect"), then explore what happens as you click among the buttons (labeled "none," "low," "medium," and "high") that adjust the greenhouse gas concentration. Which of the following occur as the greenhouse gas concentration increase?
a. the average surface temperature falls
b. more infrared light comes to Earth from the Sun
c. the average surface temperature rises
d. more visible light is absorbed in the lower atmosphere
e. more visible light reaches the ground
f. less visible light reaches the ground
g. more infrared light is absorbed in the lower atmosphere
Ans:
c. the average surface temperature rises
g. more infrared light is absorbed in the lower atmosphere
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A 1-kg glider and a 2-kg glider both slide toward each other at 1 m/s on an air track. When they collide and stick, the combined-glider speed is
A) 0 m/s. B) 1/2 m/s. C) 1/3 m/s. D) 1/6 m/s. E) 1.5 m/s.
A 3.0-kg object moving 8.0 m/s in the positive x direction has a one-dimensional elastic collision with an object (mass = M) initially at rest. After the collision the object of unknown mass has a velocity of 6.0 m/s in the positive x direction. What is M?
a. 7.5 kg b. 5.0 kg c. 6.0 kg d. 4.2 kg e. 8.0 kg
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
A(n) ____________________ is a rapidly spinning neutron star that accelerates charged particles near the poles of its magnetic field
Fill in the blank(s) with correct word