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Class 9Class 10First YearSecond Year
example 9.1the exterior brick wall of a house of thickness has an area . the temperature inside the house is and outside is . find the rate at which thermal energy will be conducted through the wall the value of for bricks is .

example 9.1the exterior brick wall of a house of thickness has an area . the temperature inside the house is and outside is . find the rate at which thermal energy will be conducted through the wall the value of for bricks is .

iii. metals are good conductor of heat due to the:(a) free electrons(b) big size of their molecules(c) small size of their molecules(d) rapid vibrations of their atoms

iii. metals are good conductor of heat due to the:(a) free electrons(b) big size of their molecules(c) small size of their molecules(d) rapid vibrations of their atoms

9.2 why metals are good conductors of heat?

9.2 why metals are good conductors of heat?

v. convection of heat is the process of heat transfer due to the:(a) random motion of molecules(b) downward movement of molecules(c) upward movement of molecules(d) free movement of molecules

v. convection of heat is the process of heat transfer due to the:(a) random motion of molecules(b) downward movement of molecules(c) upward movement of molecules(d) free movement of molecules

9.12 explain the impact of greenhouse effect in global warming.

9.12 explain the impact of greenhouse effect in global warming.

what is greenhouse effect?

what is greenhouse effect?