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How to i calculate total resistance in a circuit?

Total resistance in a circuit depends on whether the resistors are in series or parallel since this determines which equation is to be used.In series, resistors are essentially lined up next to each other so...
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Answered by Matthew K. • Physics tutor
18745 Views

What would be some handy linking words to use in my French writing - particularly essays?

When writing a French essay, it's important to not forget to follow a good, coherent structure just like you would when writing an essay in English or any other native language. Introduce your essay by refor...
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Answered by Monique S. • French tutor
4591 Views

When do I need to use 'sein' as the auxiliary verb in the past perfect tense?

Generally, we conjugate the verb 'sein' for any verb that indicates i) movement ii) or a change in state.For example i) gehen = to go and suggests an act of movement therefore we would have to conjugate the ...
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Answered by Monique S. • German tutor
8433 Views

How do i solve simultaneous equations?

simulatneous equations are solved by eliminating one of the unknowns such as x or y. there are a number of ways to do this such as substitution or subtraction/addition. For this example we will use subtracti...
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Answered by Matthew K. • Maths tutor
6024 Views

Explain in general terms what happens to a molecule when it absorbs a photon: (i) in the UV-visible region of the electromagnetic spectrum; (ii) in the microwave region of the electromagnetic spectrum

(i) In general, when a molecule absorbs a UV-visible photon, an electron is promoted from one of the occupied molecular orbitals to an unoccupied molecular orbital at higher energy. (ii) In general, when a m...
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Answered by Steven C. • Chemistry tutor
5666 Views