In which of the following , Convection of heat does not take place ?

Options

A. a) Heating of air around furnace
B. b) Boiling of water
C. c) Heating of the glass cover of a bulb due to hot filament
D. d) Land and sea breezes

Answer

D

Explanation

`m_(A) = 2Z_(A)m`
`m_(B) = 2Z_(B)m`
`(1)/(2) (2Z_(A)Z_(B))/(Z_(A)+Z_(B))mv^(2) = E`
`(1)/(2)(2Z_(A)m)v^(2) = (Z_(A)+Z_(B))/(Z_(B))E`
So `(221)/(Z_(B)) = (331.5)/(Z_(B))`
`(Z_(B))/(Z_(A)) = 1.5 = (3)/(2)`
Also
`(221) (Z_(B))/(Z_(A)+Z_(B)) = (13.6)(Z_(A)^(2)+Z_(B)^(2)) (3)/(4)`
`(16.25xx4)/(3) = ((Z_(A)^(2)+Z_(B)^(2))(Z_(A)+Z_(B)))/(Z_(B))`
`(65)/(3) = (Z_(A)^(2)+(9)/(4)Z_(A)^(2)) (1+(2)/(3))`
`(65)/(3) = (13Z_(A)^(2))/(4)xx(5)/(3)`
` Z_(A)^(2) = 4 impliesZ_(A) = 2&Z_(B)=3`