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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 -...

Factorise the quadratic by finding two numbers that add to make -7 and multiply to make 10. (i.e. -2 and -5). So x^2 - 7x + 10 = (x - 2)(x - 5) </= 0. Sketch the quadratic to see where it is negative or z...

First, let's understand when to use the pluperfect. The pluperfect is a tense expressing a past action, which is before another past action. For instance, "J'allais a la piscine car j'avais fini le dîne...