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Question 2
The root-mean-square speed (thermal speed) of a certain sample of carbon dioxide molecules, with
a molecular weight of 44 g/mol, is 396 m/s. What is the root-mean-square speed (thermal speed) of
water vapor molecules, with a molecular weight of 18 g/mol, at the same temperature?
(1) 253 m s.
(2) 396 m s.
(3) 421 m s.
(4) 619 ms.
(6) None of the above,

answer: 802.3 kilo joules of energy represents 191.75 kilo calorie of energy.

explanation:

energy released during combustion of one mole methane = 802.3 kilo joules

if 1 kilo joule = 0.239006   kilo calorie

then ,802.3 kilo joule will be = 802.30.239006 kilo calorie

802.3 kilo joule = 191.75 kilo calorie

hence, the energy in kilo calorie is 191.75 kilo calorie.

with the invention of the automobile, the woman of the house could drive to the store and get groceries. women were also free to socialize more. during world war ii women were allowed to work in factories to the war effort and could drive to work or ride mass transit buses to their jobs.

be subject to a force andchange its motion