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Oxygen moves down the trachea, into the bronchi and into the smaller bronchioles, down a pressure gradient. Once the oxygen reaches the alveoli it moves down a diffusion gradient across the alveolar epitheli...

Lets take this as an example: Simplify 5a - (2a + 6) To 'simplify an equation' means to put it at its most basic form To make it easier for us, we can place a 1 infront of the bracket, so we know what we are...

Energy (or enthalpy) needed to remove one electron from one atom.

In the play A Doll’s House, Henrik Ibsen includes Dr. Rank, a seemingly insignificant yet underappreciated character. This particular name is integral to the dramatist’s elaborate characterization of his rol...

Label the two equations. x 2 + 8x + y 2 = 84 (1) x - y = 10 (2) Rearrange (2) to get y = x - 10 and substitute for y in (1) to get x 2 + 8x + (x - 10) 2 = 84. Expanding and collecting like terms gives 2x 2 -...