Top answers

Explain what is meant by a negative externality and give an example of a negative externality that arises from fuel consumption.

A negative externality is a spillover cost affecting a third party from an economic transaction.A negative externality that arises from fuel consumption is the air pollution affecting the health of the popul...
JB
Answered by Jessica B. • Economics tutor
4449 Views

Describe the movement of ions, and changes in potential, across the nerve cell membrane during depolarisation and repolarisation.

During depolarisation, sodium ions move into the cell, resulting in the membrane potential rising from -70 millivolts (mV) to +40mV.During repolarisation, potassium ions move out of the cell, and the membran...
WP
Answered by William P. • Biology tutor
4471 Views

Solve x^2 - 5x - 14 = 0

This is an example of a quadratic equation which we can solve on of two ways as it takes the form ax^2 + bx - c = 0a = 1, b = -5, c = -14 (1) Factorisation which we can do ourselves OR (2) Use the quadratic ...
JB
Answered by Jessica B. • Maths tutor
9547 Views

Describe why organisms may become extinct due to a change in the climate

Organisms may be less well adapted to the changing climate. The organisms will be outcompete by other organisms and it will be harder to them to find food and shelter which are crucial to the organisms survi...
JL
Answered by Jessica L. • Biology tutor
3394 Views

Name 4 organelles within an animal cell

NucleusMitochondriaGolgi ApparatusSmooth endoplasmic reticulum
ZC
Answered by Zoe C. • Biology tutor
3011 Views