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What are the differences between the perfect and imperfect tenses?

(Apologies, this keyboard doesn't allow some accents)Firstly, the perfect tense requires an auxiliary verb: avoir or etre. Then the past participle is added, e.g. j'ai bu - I have drunk/I drank. The imperfec...
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Answered by Joseph K. • French tutor
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Explain the formation of headlands and bays

Alternating sections of hard and soft rock. The hard rock bands will be more resistant to erosion than the soft rock. The soft rock will therefore erode faster due to hydraulic action, abrasion, cavitation a...
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John wants to invest £100 into a savings account for 15 years. If he invests in saving account A he will receive 3.5% simple interest and if he invests in savings account B he will receive 3% compound interest. Which account should he choose and why?

100 + (3.5 x 15) = 152.50 100 x 1.03 15 = £155.80 Therefore he should choose savings account B because after 15 years he will have gained more money through interest than in account A.
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Answered by Victoria D. • Maths tutor
3323 Views

What is the difference between communicable and non-communicable diseases?

Communicable diseases are diseases that can be transferred from one person or organism to another, for example colds are spread by airborne droplets and malaria is spread through mosquito bites. Non-communic...
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Answered by Ellie B. • Biology tutor
4806 Views

What is a dynamic equilibrium?

In a dynamic equilibrium, both the forward reactions and backward reactions are still happening, but at the same rate. This means that the concentrations of the starting reactants and the products remain con...
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Answered by Ellie B. • Chemistry tutor
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