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It can be tricky to tell - and sometimes it's even a matter of choice! However, there are some simple rules that you can remember. The passé composé is used for specific events - things that happened, lik...

Think about the x-coordinate and the y-coordinate separately. Starting with the x-coordinate:

1. Find the difference between the two x-coordinates -2 and 8, which is 10.
2. to find the mid...

You see colours due to the length of a wave of light. When a distant galaxy is moving away from us the wavelength increases due to the Doppler Effect (which you may have studied using the sound of a passi...

Step One: Write the first equation and then write the second equation underneath. Label the first equation A and the second equation B. You can now see clearly that each equation contains an x component a...

In French the imperfect tense is most often used when referring to a habitual action in the past, something that you used to do frequently, and to describe something that happened over an extended period ...