How did anyone ever figure anything out about anything? Simple! Two ways: 1. By thinking real hard about it (Aristotle and co. were all about that), 2.… Read more “Ohm’s Law”

# Tag: useful

## Energy

Energy is the ability to do Work. That’s what ur mum says too, so it must be true. Eat your green vegetables. But there’s a lot of… Read more “Energy”

## Dimensional Analysis

Dimensional Analysis does and doesn’t have to do with actual Dimensions (the kind you think of when you’re talking Space) – and really, it sounds a lot… Read more “Dimensional Analysis”

## The Speed of Light

Whooooo! It’s the fastest you can go, the so-called “universal speed limit”. What would happen if you went faster than that? Well, you might break reality in… Read more “The Speed of Light”

## Combinations

A Combination is any unordered subset of a larger set “S” (a bit different from a Permutation, innit?) So if S={1,2,3}, then {1,2}={2,1} as order don′t count… Read more “Combinations”

## Permutations

A Permutation of a larger set “S” of n objects is any ordered subset of that set. The total number of permutations of r objects from n… Read more “Permutations”

## The Multiplication Principle

A long time ago (last month) in a land far, far away (from wherever the hell I come from) there was a math module craftily named “Methods… Read more “The Multiplication Principle”

## Vectors

What is a vector? Well, what most physics students in high-school learn about is that they are mathematical objects that have both “magnitude and direction”, i.e. they’re… Read more “Vectors”

## Wave Equation – A derivation

Parent page: Waves How do we describe a wave? Well, a transverse wave (in 1D) might like to be described at a particular point on whatever transmission… Read more “Wave Equation – A derivation”

## SUVAT Equations

Here’s a good one to take home to show the kids, makes learning Algebra fun! This is a short set of equations, often written using the variable… Read more “SUVAT Equations”