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To understand bond polarity, you first must understand electronegativity. Electronegativity is the ability of the nucleus of any atom to attract electrons from another atom, it is dependant on the nuclear...

Solve x²- 4x - 5 = 0
A very full explanation would be:
Start by listing the pairs of numbers that can be multiplied together to get 1 * -5 = -5 (i.e. the coefficient of the first ter...

For this question, as it is worth six marks, I would expect the student to provide three well backed-up points with substantial evidence to obtain all the marks available. They may provide both short-term...

Simultaneous equations:
x=y+1 y=2x+3
First solve for x. y=2x+3 so first equation becomes: x=(2x+3)+1 x-2x-3-1=0 -1x-4=0x+4=0 x=-4
Solve for y: y=2x+3 y=2(-4)+3 y=-8+3y=-5

One version is that which was developed by Antony Flew. The idea/essence of the story is as follows: Imagine two explorers come across a clearing in a forest (or wherever they are exploring), and they com...