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For a substance to melt or boil, heat energy must be supplied. This is to overcome Van der Waals forces. As the length of a chain increases, there are more Van der Waals forces present due to the chain ge...

1. Set the equation equal to 0, which would be 5x^2 +x - 4 = 02) Split the equation into 2 brackets. To do this, one bracket will be (5x+ or - something) and the other will be (x + or - something), as ...

In 'An Inspector Calls', J B Priestly explores the theme of remorse in many different ways. Through the characters of Mr and Mrs Birling, Priestly illustrates how privilege and prejudice from the older ge...

An action potential (AP) reaches the pre-synaptic membrane. This causes the voltage-gated calcium channels to open, and calcium ions flow down their concentration gradient into the pre-synaptic terminal. ...

It is undoubtable that Trotsky’s leadership of the Red Army played a significant role in ensuring the Bolshevik Revolution survived the civil war of 1918-1921. However, there are other factors that also c...