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What is the difference between speed and velocity?

Speed is how fast an object is moving, whereas velocity is an objects speed in a given direction.

Answered by Matthew T. • Physics tutor

4764 Views

Solve the equation ((2x+3)/(x-4))-((2x-8)/(2x+1))=1

Step 1: Multiply everything by x-4 to give

(2x+3) - ((2x-8)(x-4)/2x+1)=(x-4)

Step2: Multiply everything by 2x+1 to give

(2x+3)(2x+1)-(2x-8)(x-4)=(x-4)(2x+1)

Answered by Matthew T. • Maths tutor

9003 Views

Why doesn't the concentration of products or reactants change when a reaction is at dynamic equilibrium?

At dynamic equilibrium in a closed system (for example, in the Haber process to make ammonia), both the forward and backward reactions continue to occur. However, both reactions happen at the same rate...

Answered by Rose A. • Chemistry tutor

5821 Views

How do you factorise a quadratic equation?

A quadratic expression is of the form ax²+bx+c. It is often useful to know what values of x will make the expression equal to 0; these are known as the roots of the equation. An easy way of...

Answered by Tim W. • Maths tutor

5058 Views

How should I prepare myself for my GCSE Oral Exam?

The best long-term advice I can give is that you have got to practice speaking the language as much as possible. Try to organise weekly sessions with teachers/language assistants/online tutors to get used...

Answered by Simon C. • Spanish tutor

3835 Views