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This question can be treated like a normal binomial expansion question which is commonly seen at A level. The standard binomial expansion is (1+x)ⁿ = 1 + nx + (n(n-1)(x²))/2! where 2...

To form the perfect tense in German you use an auxiliary verb, either 'haben' or 'sein', plus the past participle of the main verb in the sentence. Most verbs take 'haben' when used in the perfect tense, ...

This will cause eutrophication. Under normal circumstances, nutrients are a limiting factor for algal growth. When the fertiliser leaches into the lake, the excess nutrients will therefore allow algae at ...

You take the present active infinitive of the verb, which is the part of the verb that means "to do something" and you add on the endings -m, -s, -t, mus, -tis, -nt. For example, the first perso...

This is because when the metals are heated (burned), their electrons can briefly 'jump' from lower energy electron shells to higher energy electron shells. This requires energy to happen, and light is not...