concept of pressure

(a). Discuss two situations in daily life where we apply the concept of pressure. (b). A body of density rho is dropped gently on the surface of a liquid of density rho' (rho' being less than rho ). Show That it will reach the bottom of the liquid after a time sqrt((2drho)/(g(rho-rho'))) , where g is acceleration due to gravity and d is the depth of the liquid.

Concepts

Briefly explain the concept of heat and concept of temperature.

Concept Of Impulse

Concept of gram atom, Concept of gram mole and Concept of gram equivalent