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The probability that the first sweet Hannah eats is orange is 6/n, as there are n sweets and 6 of them are orange. If this is indeed orange, then there are now n-1 sweets left in the bag, of which 5 are o...

The one definition of osmosis is 'The movement of water from a high concentration to a low concentration, down it's concentration gradient, across a partially permible membrane, until osmotic pressue is e...

Factorise and solve x² - 8x + 15 = 0.

When factorising there are 3 things to look for;

1. A common factor in each component of the equation. In this case there are no commo...

E_k = (1/2)mv²

E_p = mg(dh)

Set these equal to each other, because of conservation of energy:

(1/2)mv² = mg(dh)

Cancel the mass:

To answer this question we need to think about the bonding that occurs within metals. Metallic elements form strong lattices due to the metallic bonding. This consists of a lattice of positive metal atoms...