Top answers

When should I use Konjunktiv I?

Konjunktiv I is used to indicate reported speech (when you are telling someone what somebody else has said). However, Konjunktiv I is seen as very formal, and so it is rarely used in spoken German. You will ...
AB
Answered by Ashley B. • German tutor
5802 Views

Prove that sqrt(2) is irrational

First, let's assume that sqrt(2) is rational . That is, it can be expressed in the form a/b, where a and b are integers and the fraction is simplified as far as possible. So we have sqrt(2) = a/b --> 2 = ...
MW
Answered by Mark W. • Maths tutor
5504 Views

What is an equilibrium?

Have you ever tried to run the wrong way down an escalator? then you have experienced a dynamic equilibrium.You are moving up, it is moving down and yet, your actual position isn't changing. In a reaction th...
JS
Answered by Jemma S. • Chemistry tutor
3413 Views

How do polar coordinate systems work?

A polar coordinate system is just another method to determine a position of a point in space just like the cartesian coordiante system does; which hopefully you are confident with now. At A-level all you nee...
AM
Answered by Alexander M. • Maths tutor
3868 Views

Use the substitution u = 2^x to find the exact value of ⌠(2^x)/(2^x +1)^2 dx between 1 and 0.

First thing to notice here is that this question tells us exactly what method they want us to use, subsitution, and what to substitute. Hence the first step is to turn the integral provided which is currentl...
AM
Answered by Alexander M. • Maths tutor
18792 Views