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Prepositions are little words that describe the location of something, or where it’s going, like for, to, in, on, over, under in English. In German, they change the case of the noun that follows them. In ord...

The most important thing about structuring any essay is knowing what you think about the question! Before you work on the specifics of what goes in which paragraph, try to think of a short, one- or two-sente...

Step 1: To differentiate an equation there is a simple rule to follow. For y=ax n dy/dx=anx n-1 . so for an example y=x 3 , dy/dx=3x 2. Therefore we just apply this rule into our equation. Step 2: Break the ...

When you are faced with an integral which is a product, such as x.cos(x) , you may be able to integrate it by parts. The statement of the integration by parts is that: ∫u(dv/dx)dx = uv-∫v(du/dx)dx So if you ...

Current is the rate of flow of charge in a circuit; you can imagine the flow of electrons as water flowing through a pipe. If the pipe splits into two, some of the flow will go through one pipe and some thro...