Currently unavailable: for regular students
Degree: Physics (Masters) - Durham University
I'm Rosemary, a third-year Physics student with four years' experience in tutoring, first through a school mentoring scheme and then through my University's one-to-one tutoring project.
I like to use analogies to help students understand concepts, as well as encouraging students to be able to think for themselves about how to tackle problems after a bit of guidance. I aim to produce those lightbulb moments when something that was tricky clicks :)
I like to think I am patient and will tailor the teaching to each indiviual, so the more you can tell me about what you're struggling with, the better! For me, seeing someone make progress because of my contribution is very rewarding so I really hope I can help you better understand, and also enjoy, science and maths!
|Maths||A Level||£20 /hr|
|Physics||A Level||£20 /hr|
|Before 12pm||12pm - 5pm||After 5pm|
Please get in touch for more detailed availability
Emma (Parent) October 17 2016
Emma (Student) October 3 2016
Current is the flow of charge in the circuit, a bit like the flow of water in a river, and is measured in Amps (A).
Potential difference is defined as the 'work done per unit charge', which is related to the voltage across (and so the energy supplied to) a component in the circuit. It's measured in Volts, (V).
Resistance is the quantity that describes how difficult it is for a current to flow in a circuit (think of traffic trying to get through a narrow tunnel vs a motorway), and is measured in Ohms, (Ω).
Bonus: do you know the relation between these three quantities?
A: it's called Ohm's law, and it states that R=V/I, or resistance is potential difference divided by current.see more
Hint: the chain rule states that for y=u(x) ^a, the derivative will be dy/dx = dy/du * du/dx
So we just need to find dy/du and du/dx!
In this case u(x)=x-3, so du/dx = 1.
from y=u^(-3), dy/du = -3u^(-4).
This means we know dy/dx = -3u^(-4) * 1
Converting from u to x, we get dy/dx = -3 (x-3)^(-4) .... done!see more