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How many diagrams is it best to use in an extended essay?

It's a common misconception that more diagrams are always better. In fact, a diagram that is ill-defined or poorly linked to the question will not add anything to your answer and it can demonstrate a l...

DC
Answered by David C. Economics tutor
8977 Views

Let f(x) and g(x) be two odd functions defined for all real values of x. Given that s(x)=f(x)+g(x), prove that s(x) is also an odd function.

We recall that a function f(x) is said to be an odd function when f(-x)=-f(x).

We are told that f(x) and g(x) are odd functions, so we know from the abov...

KH
Answered by Keir H. Maths tutor
14256 Views

Two electrons are a distance r apart, the first electron exerts a force F on the second electron. a) What force does the second electron exert on the first? b) In terms of r, at what distance is the force that the first electron exerts on the second F/9?

This question is on electric forces between charged particles. A useful equation to consider is Coulomb's law:F=k(Q1Q2

RW
Answered by Ross W. Physics tutor
6731 Views

What is a buffer and what do you need to make one?

A buffer is a solution which resists changes in pH when alkaline or acidic solution is added to it.

Buffers are created based on the equilibrium of a proton donor/ acceptor...

FB
Answered by Felix B. Chemistry tutor
4883 Views

differentiate 2^x

y=2^x
lny=xln2
y=e^(xln2)

MP
Answered by Mit P. Maths tutor
6481 Views

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