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What is a synapse and how does it work?

A synapse is a small gap between neurones (nerve cells). Information is passed along the neurone as an electrical impulse, but to get from one neurone to the next, the information is converted into a chemica...
RL
Answered by Rhiannon L. • Biology tutor
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Lithium and potassium are both in Group 1 of the periodic table. Explain why.

Li and K both have one electron in their outer shell and therefore perform chemical reactions in a similar way and share certain characteristics.
JD
Answered by Joshua D. • Chemistry tutor
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Define the term osmosis.

Osmosis is the net movement of water molecules from an area of high water potential to low water potential, commonly across a partially permeable membrane such as a cell's surface membrane.
JD
Answered by Joshua D. • Biology tutor
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Solve 13-x > 3+4x

13-x-3>4x 10>4x+x 10>5x 2>x x<2
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Answered by Nathan E. • Maths tutor
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Solve the following set of simultaneous equations: 3x + 2y = 15 & 9x + 4y = 1

Label your equations 1 and 2. Look to eliminate one of your variables to create a third equation with only one variable. To do this multiply the first equation by 2 to obtain: 6x + 4y =30 *Label as equation ...
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Answered by Chris A. • Maths tutor
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