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The gradient of the perpendicular line is the negative reciprocal of the gradient of the original line. For example if the gradient of the original line is 4, the gradient of the perpendicular line is -1/...
Pythagoras' Theorem can only be used on right angle triangles. To find the length of side a, the theorem can be used as follows:a2=h2-b2Taking the square root ...
Ionic bonding: the electrostatic attraction between two ions of opposing charges. Usually occurs between metals and non-metals.Covalent bonding: the electrostatic attraction between a pair of electrons an...
Giant/lattice structure; delocalised (sea of) electrons; strong electrostatic atraction between ions and electrons; alot of energy to overcome.
Hypotonic - Osmosis into cells, cells swell and burst. Hypertonic - Osmosis out of cells, cells shrivel
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