Molecular Physics | Thermodynamics Answers

A Carnot engine whose sink temperature of 300K has efficiency of 40%. By how much should source temperature be increased so as to increase efficiency to 60%?

The average energy of helium is E= 2.89×TEN TO THE POWER 21 JOULE.Calculate their average speed v.

Find the average of magnitude of linear momentum of helium molecules in sample of helium gas at temperature 150pi K .mass of helium molecules =166/3×10^-27kgand R=25/3j-mol k

Why can’t a room be cooled by leaving open the door of a refrigerator?

when 300 J of heat is added to 25 gm of sample of a material its temparature rises from 25 degerr to 45 degree then thermal capacity of sample and specific of the material are

two sphers A and B have diameters in ratio 1:2 densities in ratio 2:1 and specific heat in ratio1:3 finf ratio of thermal capacity

Question 3 : A gas occupies a volume of 2.4 L at 14.1 kPa. What volume will the gas occupy at 84.6 kPa?
2.5 L
0.40 L
14 L
497 L

An electric kettle or negligible heat capacity is rated at 3500 watts if 4kg of water is put into it now how long does it take the temperature of a water to rise from 30 degree celcius to 120 degree celcius . Specific heat capacity of water =4200kg-1 k-1

A 1.5 kilowatt heater is used to heat 2.5kg of water from 25 degree celcius to 100 degree celcius in ti seconds. Find the time taken of the temperature of water to be raised.

A 2.5kg of water at 65 degree celsius is added to a 45kg of water at 8 degree celsius. What is the final temperature of the mixture?