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You can only use the perfect tense, "haber + perfect participle" when something is either very recent or is still ongoing. "Ayer", yesterday, is definitely not still going on, and i...

For this question we will use the verb manger (to eat) as an example.

The perfect tense is used to describe an action which took place once in the past. You...

The first step in answering any question is to figure out what the question really means! Velocity is a term physicists use to describe not just speed, but speed in a particular direction. When we talk...

In order to find the lowest value for X we first need to find the lowest possible value for a and b.

Let us start off with a:

If a is the lowest possible cube number we can ...

There are a number of ways where coastlines see the formation of headlands and bays but there are a number of factors which must be seen for these to form.

Firstly the geology and litholo...