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The healthy artery has more blood flowing through it as there are no fatty deposits on the inner walls.

Less invasive, not as big an operation, therefore there is less risk involved.Shorter recovery time, and so patient spends less time in hospital.Could also be: Doesn't need to use general anaesthetic. Les...

Each carbon atom in graphite forms 3 covalent bonds, which means there is one delocalised electron per carbon atom. These delocalised electrons can move through graphite and carry charge.

7 electrons.

Make the like terms equate by multiplying (1)*2 and (2)*3, ((1)*2) 24x+7y=64, ((2)*3) 24x+9y=72, Take one away from the other to remove the x term and solve for y, (24x+9y=72) - (24x+7y=64), 2y=8 y=4, Su...