Search our library of A Level questions

Top answers

All subjects

A Level

Explain BF Skinner's behaviourism

Led by BF Skinner in the 1950s and 1960s, it was the position that children acquire
language just as they acquire other behaviors-through a system of Positive and Negative
Reinforcement. A chi...

Answered by Martin Z. • English Language tutor

4664 Views

A curve is defined for x>0 as y = 9 - 6x^2 - 12x^4 . a) Find dy/dx. b) Hence find the coordinates of any stationary points on the curve and classify them.

a) y = 9 -6x^2 - 12x^4

dy/dx = -12x - 48x^3

b) At stationary points dy/dx = 0.

-12x - 48x^3 = 0

48x^3 + 12x = 0

4x^3 + x = 0

x (4x^2 + 1) = 0

Either ...

Answered by Olivia W. • Maths tutor

3598 Views

How important is it to mention literary devices in essays?

Extremely important! It may seem like a very basic thing to do, but a lot of students spend too much time mentioning how the literary piece makes the reader feel and what it conveys, without mentioning

Answered by Macarena C. • English Literature tutor

6348 Views

What is transcription?

Transcription is the process of sections of DNA being converted into mRNA (messenger RNA) that occurs in the nucleus of a cell. DNA is made up of a template strand and a coding strand whi...

Answered by Carolina M. • Biology tutor

4683 Views

How can you tell if a reaction is endothermic or exothermic? Describe a way of determining if a reaction is exothermic or endothermic using simple laboratory equipment.

Exothermic and Endothermic reactions refer to if the change in Enthalpy of a reaction is negative or positive respectively.
If a reaction is exothermic that means that enthalpy change is nega...

Answered by Tom F. • Chemistry tutor

20430 Views