Search over 10,000 free study notes

Standard deviation is the spread of data around the mean value. It is useful for evaluating the spread of a selection of data, and is used to compare multiple data sets. Ideally a data set would have a low s...

To understand this, we must first know how sound energy gets from one place to another. This is done via waves, of which there are two different types: longitudinal and transverse. Light is a transverse wave...

Our conventional numbering system is based around the idea that we can represent any number with 10 different digits arranged in a specific order. Because of this, this is called a base-10 or decimal system....

All complex numbers are in the form a+bi where a is the real part of the complex number and b is the imaginary part. Therefore if we are plotting the complex number on argand diagram the value of a tells us ...

Remember the rule for integrating is that x^n integrates to x n+1 /(n+1). Here, n = 2 so n+1 = 3. Therefore the integral will be (x 3 )/3. Remember that as the integral has is indefinite- it has no limits- y...