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What is albedo and why is it important in climate change?

Albedo is the reflectivity of a surface. A surface that has a high albedo reflects a lot of solar radiation from the sun back into the atmosphere, whilst a surface that has a low albedo reflects little solar...
FP
Answered by Faith P. • Geography tutor
51850 Views

How do I obtain the most marks in questions which require me to make a comparison? I.e. "Which was the bigger threat to European peace in the 1930s: • the re-militarisation of the Rhineland 1936 • the Nazi-Soviet Pact 1939? [10 Marks]

10-mark questions give you the best opportunity to 1) recall your knowledge of historical cause and continuity in detail, whilst 2) demonstrating your ability to conduct a balanced argument, and 3) to reach ...
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Answered by Joshua L. • History tutor
5005 Views

Explain Charles Darwin's Theory of Evolution

Populations naturally vary . (Think of how people in your class vary in height, weight and other features) This variation is brought about by inheritance of genetic material from parents. In organisms that r...
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Answered by Lewis C. • Biology tutor
5819 Views

How are specialised cells different to normal body cells?

Different parts of the body have very different functions, so it is important that the cells in these different parts have adapted in order to help the functioning to be more efficient. For example, red bloo...
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Answered by Sherrie J. • Biology tutor
10896 Views

A rocket travels at 500m/s two minutes after its take-off. If it was initially stationary, calculate its acceleration. If the rocket has a mass of 1800kg, what force is required to give it an acceleration of 2m/s^2?

a) Acceleration is the rate of change of velocity of an object In this case, the equation that we will use to calculate it is a = (v - u )/ t where v is the rocket's final speed, u is its initial speed, and ...
DS
Answered by Dhrushee S. • Physics tutor
5656 Views