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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
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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...
SJ
Answered by Sherrie J. • Biology tutor
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Factorise the following a) 8x + 6y b) 7xy + 3xzy c)5xyz - 20x^2y^2z

In order to factorise successfully, we have found the highest common factor for part a,b and c (the highest number that can be divided exactly into each of the terms) and placed these outside of the brackets...
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Answered by Dhrushee S. • Maths tutor
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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 ...
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Answered by Dhrushee S. • Physics tutor
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What does it mean to differentiate a function?

A function represents a quantity. For example the function s = (6t 2 + 4t) m, could represent displacement. The unknown t is inputted to find the displacement an object travels at a certain time. The differe...
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Answered by Neha J. • Maths tutor
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