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Explain the photoelectric effect, when does it occur and what is its significance in understanding the nature of light ? (6)

metal (unlike insulators ) contains free electrons (1) kinetic energy transferred from the light incident on the surface to the free electrons (1) The maximum kinetic energy of the electrons depends on the f...
HR
Answered by Helena R. • Physics tutor
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In a class of 30, the ratio of boys to girls is 2 : 3 , how many girls are there?

If the ratio is 2 : 3 then in a class of 5 there would be 2 boys and 3 girls. So we can say that 2/5 of the class are boys and 3/5 of the class are girls. And we know that to calculate 3/5 of 30 we must firs...
RE
Answered by Rebecca E. • Maths tutor
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How am I supposed to remember quotations for unseen texts?

Trying to remember quotations for the exam can be one of the trickiest aspects to English Literature at A-level. For my studies, I displayed bunting around my room with key quotations from all of the texts a...
EW
4295 Views

What is the use of a web-server on the internet?

A webserver is a computer that has been set up to listen for incoming requests from a client, find appropriate data for that request and return a response to that client. This is similar to a 'chatbot' on Fa...
JP
Answered by Jack P. • Computing tutor
3012 Views

y = 2x + 5, Calculate x when y = 4

y = 2x + 5 y = 4, therefore 2x + 5 = 4 2x = 1 x = 1/2
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Answered by Jacob T. • Maths tutor
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