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Describe the photoelectric effect.

If we give a peice of gold negative charge and shine long wave, low frequency, electro-magnetic (E-M) radiation on it (for example radio waves) absolutely nothing will happen. If you start to shorten the wav...
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Answered by Umar S. Physics tutor
4726 Views

What is diffusion?

For the exams, the definition you will need to know is that "diffusion is the net movement of a substance from an area of high concentration to an area of low concentration, down a diffusion gradient&qu...
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Answered by Emily R. Biology tutor
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How should a personal statement be started?

I believe that the best way to begin a personal statement is to immediately begin with an interesting point about yourself that relates to the degree you're applying for. Beginning with "I want to study...
CP
4008 Views

What is democracy?

Originally in Ancient Greece democracy was a form of government where all the people in a society make decisions, although in reality this meant only the free men and not any women or slaves. The aim of demo...
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4440 Views

What are methods of promotion?

There are six main methods of promotion that businesses can use. The first method is advertising, which is above-the-line promotion, and involves any form of advertising such as TV or radio adverts, billboar...
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45185 Views