Top answers

Given that y > 0, find ∫((3y - 4)/y(3y + 2)) dy (taken from the Edexcel C4 2016 paper)

This can't be integrated directly as y appears in the numerator and denominator. This is an indication that you must integrate by parts. A/y + B/(3y+2) = (3y - 4)/y(3y + 2) A and B must be found. Multiply by...
SS
Answered by Saskia S. • Maths tutor
11978 Views

Why do we use non-renewable energy?

In modern life there is a large demand for energy as it is needed for everything from transport to heating. Whilst there are many renewable options for energy many of these run into issues in terms of their ...
TP
Answered by Thomas P. • Physics tutor
2453 Views

What are the models for enzyme action and how to remember the differences?

The two models to explain the actions of enzymes with substrates are the Lock and Key model & Induced fit model. In lock and key the enzyme is the lock and the substrate is the key. As with a lock and th...
TP
Answered by Thomas P. • Biology tutor
49128 Views

Las energías renovables, ¿son el futuro?

Por un lado, necesitamos reducir las emisiones de CO 2 para salvar el planeta y no usar todos sus recursos naturales. Las energías renovables, como la energía solar, pueden ayudarnos hacer esto porque son ca...
CM
Answered by Charlotte M. • Spanish tutor
2839 Views

Why are active transport and diffusion different?

Active transport is the movement of molecules, usually against the concentration gradient (going from low concentration into a higher concentration), and it requires energy. Diffusion is the movement of mole...
VC
Answered by Victoria C. • Biology tutor
3048 Views