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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 ...

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 transv...

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 syst...

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 te...

Remember the rule for integrating is that x^n integrates to xⁿ⁺¹/(n+1). Here, n = 2 so n+1 = 3. Therefore the integral will be (x³)/3. Remember that as the integral has is indefi...