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You should use the subjunctive in a few cases, which are all dictated by grammatical structure. Usually, the subjunctive indicates a 'feeling' in the verb, especially of fear, doubt, or uncertainty. It is...

The main arguements for the death penalty centre on the idea of justice (eye for an eye principle), closure for the victim's family, the punishment being the ultimate deterrent and an effective way of pro...

relevant equations: F = k*x      F is force, k is spring constant and x is displacement from equillibrium.

W = 1/2kx²      W is work done.

rearranging F = k*x and using t...

Atmospheric pressure is an expression for the force exerted on a surface (in this case the water surface) per unit area caused by air particle collisions on the surface. In a cup of water, there is a unif...

This a relatively simple question which requires the use of the chain rule to solve. First we set u = sin(x)  so we then have y = u² . Next we perform do differentiations, one on u as a functio...