Top answers

How do you revise for Classics?

Classics can often be seen as a very do-it-yourself subject, which can be extremely daunting with the amount of information you have to learn. The best method to revise Classics for me was to use a combinati...
PM
8054 Views

What is the difference between the null hypothesis, alternate hypothesis, directional hypothesis and non-directional hypothesis?

A hypothesis is a statement about the relationship between two variables (usually, the IV and the DV). The statement must usually also be operationalised or 'testable', which is another way of saying made mo...
PM
30406 Views

An isosceles triangle has a base with length x+4 and the other two sides have length x+3. The perimeter of this isosceles triangle is 16cm. Find the area of the triangle.

First, we need to find the value of x. The perimeter of a shape is the sum of the length of all of its sides, so the perimeter of this isosceles is x + 4 + 2(x + 3) = x + 4 + 2x + 6 = 3x +10. We are told tha...
DM
Answered by Dominic M. • Maths tutor
4753 Views

Differentiate y = 15x^3 + 24x^2 + 6 with respect to x.

To differentiate y with respect to x, you have to multiply each x term by their respective power and then decrease their power by one. For example, 4x 2 differentiated is 2 x 4x 2-1 = 8x. So, splitting this ...
DM
Answered by Dominic M. • Maths tutor
4209 Views

Why does the first ionisation energy increase across period 3?

The 1st ionisation energy is defined as the energy required to remove the outermost electron from one mole of gaseous atoms, forming one mole of gaseous 1+ ions. Moving from left to right the proton number i...
HP
Answered by Hamish P. • Chemistry tutor
2447 Views