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This question tests the knowledge of students on indirect taxes, demerit goods, negative externalities and market failure. It is an example of a longer answer question, where students would be expected to...

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...

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 viole...

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...

Newton's law of gravitation is;
F = GMm/(r²)
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 valu...