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How does an electrical impulse travel the gap between two nerves?

The electrical impulse that travels along a nerve, known in biology as an action potential, gets passed along to an adjacent nerve as a chemical signal. When an action potential reaches the end of a nerve, i...
LM
Answered by Lucy M. • Biology tutor
5286 Views

How would you solve a quadratic equation (e.g. x^2-8x+15=0)?

There are two ways to solve the equation. One is to simply factorise it and the other is to use the formula provided in the formula booklet. The second method is probably easier when there isn't a nice easy ...
JG
Answered by Jane G. • Maths tutor
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How should i structure my personal statement and what should i include/ leave out?

Introduction- a brief overview of why you want o study medicine and the necessary skills, experiences and qualities you feel you have that will allow you to succeed in such a career. Main Body- approximately...
LS
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What is the difference between the perfect and imperfect tense?

The perfect tense is used when the action being described has been completed while the imperfect tense implies that the actions is still ongoing or does not have a definite ending.
JG
Answered by Jane G. • French tutor
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a sample of hydrated NiSO4 witha mass of 4.414g is heated to remove all water crystallisation. The resultant mass is 2.287g. How many H2O molecules to each NiSO4 were there in the original sample

Mr of NiSO4 is 154.8 g/mol Mr of H2O is 18 Mass of NiSO4 in sample is 2.287 g Mass of H2O in sample is 4.414-2.287 = 2.127g divide mass of each of NiSO4 and H2O by Mr to obtain the ratio in moles NiSO4: 2.28...
CS
Answered by Calum S. • Chemistry tutor
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