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In a right-angled triangle calculate the length of the hypotenuse when the side lengths at 5cm and 7cm. Leave your answer as a surd.

Using pythagoras’ theorem:a^2 + b^2 = c^2 hypotenuse = sqrt(5^2 + 7^2) = sqrt(25+49) = sqrt(74)
Answered by • Maths tutor
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What is the light-dependent reaction in photosynthesis?

The light-dependent reaction is the first stage of photosynthesis (the second stage is the light-independent reaction), and it takes place within the thylakoid membrane of the chloroplasts. Firstly, light is...
MW
Answered by Matthew W. • Biology tutor
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Describe and explain how a signal is transmitted between neurones.

Action potential arrives down the first neurone. The action potential is a changing potential as a result of ion channels opening along the walls of the neurone, with Na+ moving in down the electrochemical g...
SV
Answered by Shashvat V. • Biology tutor
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Solve the equation x^2 + 10x + 24 = 0

So, we are dealing here with a quadratic equation as it is written in the form ax^2 + bx +c = 0 To tackle this we will firstly need to factorise the equation, we need to find two numbers that will multiply t...
AS
Answered by Aleema S. • Maths tutor
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Give one reason as to why is it important that Carbon dioxide (CO2) is removed from the blood ?

In the blood, the enzyme carbonic anhydrase allows water and CO2 to combine to form hydrogen carbonate ions and hydrogen ions. In the presence of many hydrogen ions, oxygen has a weaker affinity for haemoglo...
NO
Answered by Novella O. • Biology tutor
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