Applied Mechanics is the branch of physical science and practical application of mechanics.
Applied Physics :
Applied Physics is the general term for physics which is intended for a particular technological or practical use.
Applied Chemistry includes the topics in Engineering such as mass and heat transfer, fluid flow, unit operations or reaction and separation, reaction engineering and selection of adequate material.
Applied Mathematics is a branch of mathematics that concerns itself with the mathematical techniques typically used in the application of mathematical knowledge to other domains.