Home
Class 8
PHYSICS
When the air cools, its density :...

When the air cools, its density :

A

increases

B

decreases

C

does not change

D

none of these

Text Solution

AI Generated Solution

Promotional Banner

Similar Questions

Explore conceptually related problems

When the air gets heated, its density ......

The hot air rises up as its density increases.

With the rise in temperature of air its density increases.

when water is cooled , it changes to ice . Why

Statement-1 : Sound travels faster in moist air Statement-2 : The density of moist air is less then density of dry air.

Given the density of air is 1.29 kg m^(-3) . Then, the relative density of air is ________.

An irregular piece of metal weighs 10.00g in air and 8.00g when submerged in water (a) Find the volume of the metal and its density. (b) If the same piece of metal weighs 8.50g when immersed in a particular oil. What is the density of the oil?

Assertion : When a glass of hot milk is placed in a room and allowed to cool, its entropy decreases. Reason : Allowing hot object to cool does not violate the second law of thermodynamics.

Consider the following statements: Assertion (A) The velocity of sound in air increases due to the presence of moisture in it. Reason (R ): The presence of moisture in air lowers the density of air. Of these statements-

A particular substance is being cooled by a stream of cold air (temperature of the air is constant and is 5^(@)C ) where rate of cooling is directly proportional to square of difference of temperature of the substance and the air. If the substance is cooled from 40^(@)C to 30^(@)C in 15 min and temperature after 1 hour is T^(@)C, then find the value of [T]//2, where [.] represents the greatest integer function.