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Describe how a reflex occurs?

A reflex is an innate (in built) action designed to keep an organism safe from harm. A good example of a reflex is to imagine you touch a hot pan, you immendiately withdraw your hand from the painful stimulu...
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Answered by Isabelle H. • Biology tutor
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How do you form the present perfect tense in Spanish?

The present perfect tense is really useful and needn't worry you! In English when we say things like 'I have gone' or 'We have arrived' , this is the present perfect tense. It is used to describe an action t...
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Answered by Nathaniel A. • Spanish tutor
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How do I form the past simple tense in Spanish?

Spanish verbs (words like 'to do' or 'to say' or 'to eat', in English) come in two main groups. Firstly, there are the -ar ending verbs, which make up about 70 per cent of Spanish verbs. Some examples of the...
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Answered by Nathaniel A. • Spanish tutor
3965 Views

Which direction would the equilibrium move if the pressure at which a reaction takes place was increased? (Le Chatelier's Principle)

Looking at the reaction between hydrogen and carbon monoxide to form methanol: CO + 2 H 2 ⇌ CH 3 OH There are 3 moles on the left hand side and 1 mole on the right hand side. According to Le Chatelier's Prin...
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Answered by Ethan C. • Chemistry tutor
4671 Views

Solve the equations giving your answer in 2d.p (5 Marks).: x^2 + y^2 = 36 , x = 2y + 6

x 2 + y 2 = 36 (1) x = 2y + 6 (2) You can solve simulateous equations in three ways: Substitution, addition or subtraction. If one equation contains both x 2 and y 2 then you should use substitution as with ...
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Answered by Joseph P. • Maths tutor
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