Which of the following is not a layer of the earth’s atmosphere?
a. troposphere
b. exosphere
c. methosphere
d. mesosphere

Ascientist measures the speed of sound in a monatomic gas to be 449 m/s at 20∘c. what is the molar mass of this gas?

Alidded glass container is filled with a colored gas. after a period of time, it is observed that the gas is uniformly spread throughout the box and that the movement has slowed considerably. next, a warm iron plate is carefully placed under the box. why is there resumed movement of the gas in the container?

Which rate indicates the number of children that would be born per woman if she were to live to the end of her child bearing years