This is what TPR taught us to do:
First off, remember the test is very conceptual. So generally you need to think about things like what will happen to one variable if you change another variable:
i.e. E= hf, such that f = c/lambda
So two things to think about:
One you want to think about how the graph would look. If you are comparing E to f you would find it to be linearly proportional, in our example. So this would be an increasing straight line going through the origin.
However, say you use c/lambda for f and get the eqn. E = hc/lambda
Then you know tha E times lambda = hc, and you want to compare E to lambda.
Here you find that the graph is inverse, so you want to think about how it would look, and it would be hyperbolic.
The other thing you want to think about is what happens when you increase one variable, to the other variable. In the example, E would decrease if lambda increases and vice versa. However, if f increases, then E increases and if f decreases, E decreases.
Questions of this nature will often be asked.
Now for calculations:
Let's first start by saying that constants which have some decimal number or something, can be rounded. I.e. gravity would be 10, not 9.8 for MCAT purposes.
Let's review a little bit with fractions:
If you have something like 47/9, you would round that to 50/10, for simplicity's sake and then look at the closest answer.
If you have something like 82/8, that could be simplified to 41/4, and then rounded to 40/4 for simplicity's sake.
Hopefully you understand what I'm saying.
For square roots, if needed, it would be the same thing:
If you have the square root of 82, you could round down to sq. rt. of 81 to get an answer of 9.
I'll look at some old things and get back to you with more stuff, if you want.
