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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
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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
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Explain why _____ chose to start his new business as a sole trader. (6 marks)

Command word: Explain This means that in order to score the 5-6 marks range, a detailed response with reasons for how something will benefit for improve a particular phenomenon is necessary. The 6-mark quest...
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8193 Views

How does the human body regulate its blood glucose levels?

Once a person has eaten a meal, their digestive system will break the nutrients down into smaller components that can travel in the blood to any parts of the body that need them. Any carbohydrates in this fo...
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Answered by Harry B. • Biology tutor
50427 Views

Discuss the evidence for plate tectonic theory.

This question is a 10 marker and comes at the end of the 25 mark section on Plate Tectonics. When answering a Discuss question it is important to remeber that it is in essence a mini essay, however, it is sh...
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Answered by Philip B. • Geography tutor
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