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Q: The pressure of air at a certain temperature is proportional to-
  • A. Density
  • B. Distance
  • C. Velocity
  • D. Volume
Correct Answer: Option A - At certain temperature, pressure of the air is directly proportional to the density of air. If pressure on the gas is doubled density is also doubled.
A. At certain temperature, pressure of the air is directly proportional to the density of air. If pressure on the gas is doubled density is also doubled.

Explanations:

At certain temperature, pressure of the air is directly proportional to the density of air. If pressure on the gas is doubled density is also doubled.