True or false
(i) Steel is better conductor of heat than bricks.
(ii) Radiations are ultrasonic waves.
(iii) Black body is having emissivity 2.
(iv) Natural convection do not need any external source for fluid flow.
(v) Fins cause increase in rate of heat transfer
heat transfer - Surve M V, Thursday, August 2, 2012 at 5:07am
heat transfer - sabin, Monday, February 3, 2014 at 7:19am
explain thermal conductivity & give its variation in case of solids liquids & gases