Study Of Physics
 
When two equal and unlike parallel forces act at different points of a body, then they constitute a couple.
 
 
Transfer of heat due to the movement of molecules from one place to the other.
 
 
Transfer of heat due to interaction of electrons or molecules.
 
 
Such vectors when added give the resultant vector.
 
 
Change in unit volume caused by unit kelvin change in temperature.
 
 
Change in unit length caused by unit kalvin change in temperature.