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Metallic bonding occurs due to electrostatic forces of attraction between a lattice of positively charged ions and a "sea" of delocalised electrons. (Draw diagram) These electrostatic forces are...

This is a good candidate for integration by parts because it is a product of two functions – ln(x) and x^3, and x^3 is easy to integrate. The definition for integration by parts is: integral(u dv/dx) d...

Restriction enzymes cut at specific sequences named palindromic sequences. These are unique as they read the same in opposite directions. A specific palindromic sequence is complementary to a specific res...

There are a number of ways to evaluate a source, and by using a range of these you can get an excellent idea of whether it is reliable or not.

When was it written?- Often public opinion on certain ...

The best way to start with this kind of analysis, particularly with unseen poetry is to read through the poem carefully and get a general feel for how it makes YOU feel. Does it make you feel happy or sad...