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Q & A: positive and negative

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Most recent answer: 10/22/2007
Q:
In Science we are learning Chemical Charges Positive charges and Negative ones. I dont get if you placed them together as one it makes zero (neutral) cause Neg+Pos= Positve in math but in the class room its zero how can that be?
- Tricia (age 13)
Pitman Middle School, NJ,Usa
A:
It's odd that you say that in math class you learned that pos + neg =pos. If you have the same size pos and neg, you obviously get zero. That's like getting paid a dollar and paying out a dollar, it leaves you right where you started, with zero change.

Mike W.

(published on 10/22/2007)

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