Tag: convection
Questions Related to convection
In which of the following process, convection does not takes place primarily?
A double-plane window consist of two glass sheets each of area $1m^2$ and thickness $0.01m$ separated by a $0.05m$ thick stagnant air space In the steady state, the room glass interface and the glass outdoor interface are at constant temperature of $27^oC$ and $0^oC$ respectively. The rate of heat flow through the window plane is (Given , $k _{glass}=0.8\,\,W\,\,m^{-1}K^{-1},K _{air}=0.08\,\,W\,\,m^{-1}K^{-1})$
A 1200 kg car is braked to a stop from 100 km/h. If 60% of this energy appears in the steel brake drums, whose total mass is 10 kg its temperature will rise by $\left( s _ { \text { steel } } = 450 \mathrm { J } / \mathrm { kg } \mathrm { K } \right)$
While measuring the thermal conductivity of liquids, the upper part is kept hot and lower one cool so that :
Fireman crawl when entering a burning building because:
Convection of heat takes place in:
Birds glide effortlessly in the air with the help of
It is hotter at the same distance over the top of a fire than it is on the side of it mainly because
State whether the given statement is True or False.
Most of the heat transfer that is taking place on the earth is by Radiation.
If there were no atmosphere around the earth, the temperature of the earth will