Top answers

Describe and explain the formation of a gorge - 6 marks

Waterfalls often form when hard (e.g. granite) and soft (e.g. clay or chalk) rock are present , where water flows across the harder rock and drops onto softer rock. The falling water then starts to form a pl...
JA
Answered by Josh A. • Geography tutor
11194 Views

Analyse how barrier to entry determine the degree of competition in the British transport market.

A barrier to entry is any complication or expense a firm might encounter when entering the transport market. There are many barriers to entry such as economies of scale being exploited by pre-existing firms;...
NW
6787 Views

What happens during eutrophication?

The addition of nutrients such as nitrate means that nutrients no longer limit plant growth.Algae begins to bloom which blocks out sunlight. As a result, plants cannot photosynthesise (or photosynthesis is r...
EC
Answered by Emily C. • Biology tutor
3497 Views

Differentiate the function y = 26 + x - 4x³ -½x^(-4)

dy/dx = 1 - 12x² + 2x^(-5)
LM
Answered by Louix M. • Maths tutor
3721 Views

Why does as an excess of nutrients such as nitrates lead to animal death in bodies of freshwater?

This is an unexpected result as usually nutrients are considered beneficial to organisms. Some organisms do benefit enourmously from the nutrients, but this leads to the deaths of other. The high concentrati...
DA
Answered by Daniel A. • Biology tutor
3639 Views