1. What virtual force\' acts on an air mass when the air mass moves in a North-S
ID: 512605 • Letter: 1
Question
1. What virtual force' acts on an air mass when the air mass moves in a North-South direction? a. Centripetal force. b. Centrifugal force c, Hadley force. d, Coriolis effect. 2. What is meant by the word "virtual, as used in virtual force. a. That the force is not a force in reality, but appears to be a force only because an 'effect' is observed which appears identical to as if a real force had been applied b. That the force is very small, hard to measure, and has no significant effect. c. The force acts in the opposite direction than it actually seems to be acting in. d. It is a real force, but it is virtually the only phenomena that can be attributed to the effect observed. 3. Pressure gradient forces tend to cause winds to move with respect to pressure isotherms a. Perpendicularly across them. b, Parallel to them. c. At an angle neither perpendicular nor parallel. d. None of the above. 4, Friction plays what part in the movement of winds due to pressure gradient forces? a. It causes high-pressure areas in the Northern Hemisphere to move counter-clockwise. b. It slows down the air movement and thereby increases the inertial effects. c. It slows down the air movement and thereby decreases the inertial effects. d. It causes the winds to move perpendicular to the pressure isotherms.Explanation / Answer
1) Ans (d) Coriolis Force
2) Ans (b) Virtual force is a very small, hard to measure and has no significant effect
3) Ans (b) The pressure gradient force tend to cause winds to move parallel to pressure isotherms
4) Ans (b) It slows down the movement of air and thereby increases inertial forces
5) NOx are nitrogen oxides which are released into the atmopshere from the burning of fuel at high temperatures. The biggest contributors are the automobile industry.
6) The main pollutants are NOx, SOx and PM10
7) Ans (d) Occean surface deposition
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