Search our library of A Level questions

Top answers

All subjects

A Level

When do you use the subjunctive form?

The subjunctive (le subjonctif) is a mood that is used to express: desire, uncertainty, probability, and other subjective feelings about a situation. It is formed by regular and i...

Answered by Isabella R. • French tutor

1396 Views

Two trains are heading in opposite directions on the same track. Train X has a mass of 16000kg and a speed of 2.8m/s. Train Y has a mass of 12000kg and a speed of 3.1m/s. At what speed do the joined trains move off together immediately after the collison?

Remembering that if the velocities are in different directions they have different signs:Total momentum before=Total momentum afterMomentum=mass x velocityTotal momentum before= (16000x2.8)+(12000x(-3.1))...

Answered by Carys J. • Physics tutor

1424 Views

Suggest how a wood mouse maintains a constant body temperature when in a cold environment?

Thermoreceptors in the skin and hypothalamus detect low temperature and send impulses to the heat gain centre inthe thermoregulatory center in the hypothalamus. This heat gain centre sends out impulses to...

Answered by Akshi S. • Biology tutor

2813 Views

z = 5 - 3i Find z^2 in a form of a + bi, where a and b are real constants

z^2 = (5-3i) = 25 - 30i + 9i^2Since i^2 = -1 => z^2 = 16-30i

Answered by Adam M. • Maths tutor

2694 Views

Sustainable approaches to coastal management will become more important than traditional approaches in dealing with the impacts of climate change.

The key to the question is coastal management in the future in response to impacts of climate change (highlighting the possible future impacts: sea level rise and changing weather events). AQA defines “ha...

Answered by Rebecca S. • Geography tutor

10459 Views