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An easy way to learn the verbs which take Etre when forming the perfect tense is by using Mrs Van Der Tramp. If you learn every verb on this list, you will know whenever they pop up that you must use Etre...

Context: Curley's wife is the only woman on the ranch, she is alone in a mans world. Immediately this marks her out to us, as contextually she would have no power or stat...

Acceleration is defined as

A = change in velocity / time,

For this example

A = (34-25 )/ 6 = 9/6 = 1.5 m/s^2

15x + 8 = 53

15x = 53-8 = 45

x = 45/15 = 3

So firstly, the first two columns in the periodic table are classed as the 's' group, the next 10 groups/columns, which are the transition metals are called the 'd' group, the last 6 colums are classified...