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Explain how to use the passé composé.

The passé composé is used for actions which have been completed in the past.It is formed of an auxiliary verb, either avoir or être conjugated depending on the subject, and the past participle of the verb. M...
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Answered by Ellen B. • French tutor
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Why is the redshift important?

The redshift is an important piece of evidence for the big bang theory. If we look at the visible region on the electromagnetic wave spectrum, we will see there is red light on the left and there is violet o...
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Answered by Laxshana C. • Physics tutor
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Describe how collision theory explains an increase in the rate of a reaction at higher temperatures.

When temp increases, kinetic energy of molecules increases. Higher kinetic energy means molecules move around more and increased movement leads to more collisions. Collision theory states that the rate of re...
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Answered by Charlie M. • Chemistry tutor
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Using Newton's law of gravitation, derive a suitable formula for the escape velocity of an object at Earth's surface.

Newton's law of gravitation is; F = GMm/(r 2 ) Where G is the Universal Gravitational constant, M is the mass of Earth, m is the mass of the object and r is the radius of Earth (no values are needed for this...
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Answered by Charlie M. • Physics tutor
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How do I demonstrate good close reading in an exam?

The key to good close reading is understanding the text: read the passage through slowly and carefully, and make sure you understand what’s happening. If it’s a poem, what is the poet trying to say? Or what ...
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