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Gamma rays can be used to sterilise medical instruments, however, they can cause cancer.Ultraviolet waves can be used for security on bank notes, however, they can cause sunburn and blindness.Microwaves c...

Atoms that share electrons due to the electrostatic attraction between the negatively charged pair of electrons and positively charged nuclei.

The liver produces bile.Bile is an alkaline solution that neutralises stomach acid. The HCl in the stomach produces acidic conditions. These acidic conditions are not suitable for the rest of the alimenta...

2x + y = 6x - y = 6x = 6 + y => 2(6 + y) + y = 18 => 12 + 3y = 18 => 3y = 6 => y = 2x - (2) = 6 => x = 8x = 8, y = 2

Firstly you should take some time to read the question fully at least 3 times and to circle/underline/highlight what it is asking you to do in order to ensure you fully understand it. Secondly you should ...