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When do you use 'avoir' or 'être' for the passé composé?

The passé composé is composed of two parts - the auxiliary verb (avoir or être) in the present tense and the past participle of the verb you want to pu...

Answered by Rachel D. • French tutor

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Name 3 differences between RNA and DNA (3).

RNA is single stranded however DNA is double stranded. RNA contains the base uracil however DNA contains the base thymine. RNA contains the sugar ribose however DNA contains the sugar deoxyribose. RNA is ...

Answered by Samodani W. • Biology tutor

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According to Newton's third law, every action has an equal and opposite reaction. Why then does a box move when I push it? Shouldn't the two opposing forces cancel out to a zero net force?

The key to this question is realising that the action and corresponding reaction refer to forces that act on different objects. When I push the box, I exert a force on the box. As a result of thi...

Answered by Ellen S. • Physics tutor

6621 Views

Define the term osmosis

Osmosis is the movement of water particles from an area of high concentration to an area of low concentration through a partially permeable membrane along a concentration gradient.

Answered by Alice D. • Biology tutor

2996 Views

What's the difference between movements along and shifts in the demand curve?

(the answer to this question would be assissted by the use of diagrams) Movements along the demand curve are caused by changes in price. A change in price will move to a new point on the demand curve. For...

Answered by Sarah L. • Economics tutor

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