CBSE Class 7: Heat Transfer: Conduction Videos | Heat

• Why we use two thi blankets over a  one thick blanket    
• when the pen is removed from fire it slowly cool down as
• How does heat flow from one object to another  
• a piece of ice of mass 60 g is dropped into 140 g of water at 50°C.calculate the final temperature of water when all has melted .(assume no heat is lost to the surroundings) specificheat capacity of water is equals to 4.2 j/g K specific latent heat of fusion of ice is equals to 336 j/g
• What will happen if we put a 45 C iron rod in 45 C water  
• Why is gap left between rails on railway tracks
• A brass tumbler feels much cooler than wooden tray on a chilly day  
• Stainless steel pans are usually provided with copper bottoms. Why?
• (i) One end of a wooden spoon is dipped in a cup of ice cream. What change will be observed at its other end?(ii) Why do we use handle of wood in frying pan?
• (i) An iron ball at 40^oC is dropped in a mug containing water at 40^oC. What will be the passage of flow of heat in the system. Explain.(ii) How the heat flows in a body having one end cool and other at high temperature?

Queries asked on Sunday & after 7 pm from Monday to Saturday will be answered after 12 pm the next working day.