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Eisntein showed that in his theory of relativity that energy and mass were no longer conserved, as they are in Newton's theory. This completely changes how we see particles. They are no longer fundamental...

Imagine that there are 10 apples to be sold at $1 each and that there are 10 people wanting to buy (demanding) an apple each. Now imagine there is an apple health-craze in this country and so now there ar...

There are three simple steps to prove anything by induction.

Step 1: When n=1

1²=1

then: 1/6 x 1x (1+1) x (2+1)

=1x2x3/6 =1

Therefore it is true for n=1 

This is a common misconception when learning to distinguish ser and estar. There are many rules and exceptions regarding this. Here's an example: "Mi abuela es mayor" vs "Mi abuela está may...

We first notice that the degree of the numerator is the same as the degree of the denominator so we have an improper fraction which we need to separate into an integer and a proper fraction before we can ...