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Cyclohexene contains a double bond, which has a greater electron density than the system of pi-bonds present in a benzene molecule. This means that a dipole can be induced in the bromine molecule due to t...

Write down the formulas involving cos2x and select the one which involves only cosine, this is because cosine (or derivations of it) is the only trigonometric function in this question. Substitute the cho...

With distance downstream, the river gains more energy and a higher volume of water (as shown in Bradshaw's Model). Because the channel has increased in size, there is less friction. As the river erodes la...

There are a number of verbs which take etre as the auxiliary verb when forming the perfect tense. These are generally verbs showing movement or a change of state and a useful technique to remember them is...

In German, we have 3 different genders: masculine, feminine and neuter. Most of the time you simply have to learn off by heart which nouns are which gender, however there are some rules which can help. Fo...