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Thanks alot. I was mainly confused with the wording of the answers.

Hi, Could anyone help me with this multiple choice question. Ethanol is widely used as a solvent. It's solvent properties are due to: (a) the polarity of the hydrocarbon chain (b) the polarity of the hydroxyl group (c) the electronegativity of the carbon atom (d) the length of the carbon atom...

Thanks. Is there any other reason?

Hi, What is the reason for squaring the period rather than just the period when displaying it on a graph. I need to do this for the pendulum experiment but don't understand why. Thanks.

Thanks so much. Still welcome for more links. =)

Hi, Is there any website like mathsonline for ext 2 math.Currently, mathonline does not have any content for ext 2. I guess there is also youtube, but does anyone know any other websites that explains the concepts?