i know just to lazy to find it in my book. but i will get back later. :)
There are several formulae involving work and energy. The basic definition of work (basically, mechanical energy) is: work = time x distance There are other formulae to calculate sound energy, electrical energy, light energy, etc.
chemical work using chemical formulae and chemical compounds
No, because trigonometry is a big subject: there are many formulae.
There is no formula as such. You partition the compound shape into simpler shapes whose areas you can work out using formulae, and then add all those parts together.
Because that is the definition of a constant. Moreover, if it changed in different formulae then those formulae would either not work or they would be inconsistent.
What are the conventional formulae?
You work both out from measurements of the shape and the relevant formulae.
There are thousands of mathematical formulae.
Different formulae are used for different shapes. For irregular shapes you may have to use integration, but since this is advanced math, you may first want to learn to use the formulae for different standard shapes.
You will find several formulae in the Wikipedia article on "derivative".
There are different formulae for calculating different kinds of energy.There are different formulae for calculating different kinds of energy.There are different formulae for calculating different kinds of energy.There are different formulae for calculating different kinds of energy.
Different figures have different formulae; here you will find formulae for the areas of some figures: http://en.wikipedia.org/wiki/Area#Formulae