I am a Chemistry student at Durham University. I've always had a passion for learning new things, but most importantly helping others to learn new things too! I'm an open, patient individual who aims to put you at ease with your science and maths woes.
I was a prefect at school which involved mentoring those younger than me with both subject and pastoral problems, and I volunteered at another school helping children around the age of 7 in the classroom, so I've definitely had experience teaching others!
I need help with science...
I understand how hard the sciences can seem, and can and will go at any pace to help and guide you through all those tricky bits! Remember there is no such thing as a stupid question, except the one that goes unasked! I love the feeling of finally understanding something that has been vexing me - and would love to pass that on to you!
I need help with maths...
I used to find maths so difficult I never thought I would carry it on to A-Level, let alone do it as part of my degree, yet here we are! It was all due to the amazing teaching I've had over the years to boost my confidence and ability, and I'd love to return the favour!
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You need to use the equation that relates frequency and period; period = 1/frequency
Then all you need to do is plug in the frequency to get the periodic time:
period = 1/0.80 Hz = 1.25 s
[NOTE: If you're confused as to how you get the unit of s from Hz, remember that another way of writing the unit Hz is s-1, so when you divide by s-1 it becomes just s.]see more
These elements are in the same group in the periodic table due to their electron configurations:
fluorine: 2, 7
chlorine: 2, 8, 7
They both have 7 electrons in their outer shell, so therefore are both in group 7 of the periodic table, with chlorine directly below fluorine.see more
First you look at BIDMAS, which determines the order in which functions are completed, [Brackets, Indices, Division, Multiplication, Addition, Subtraction], which says we deal with the brackets first, so we expand the bracket by multiplying everything in the bracket by whats outside it; in this case 3.
3x - 6 = 21
We then need to reaarange the equation to get x on its own, remember that when anything goes over to the other side of an equals sign it changes to the opposite of its function (positive - negative or multiply - divide). So the -6 goes across and becomes a positive 6:
3x = 21 + 6
3x = 27
Then the multiply by three goes over and becomes a divide:
x = 27/3
x = 9see more