Question

Rewrite the correct statement:-
. Conduction does not need any physical contact for the transfer of heat.
i. Sound energy can travel faster in vacuum.
ii. The Chemical reaction is irreversible in secondary cell.
v. Mouth organ is a wind instrument. .
v. Air is a good conductor of heat.​

Answer 1

Explanation:

Radiation doesn't need.... or Conduction does need physical contact....

Sound energy travels faster in solids or light energy travels faster in vaccum

In place of secondary it will be primary cell.

Air is bad conductor of heat.