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What is crude oil and how is petrol derived from it?
Crude oil is a mixture of hydrocarbons. The crude oil is evaporatedand its vapours condense at different temperatures in the fractionating column. As you go up the fractionating column, the hydrocarbons have...
TP
Answered by
Tahir P.
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4223 Views
Why does water expand when it gets cold while metals contract?
The temperature of a substance is a measure of the average kinetic energy (energy of movement) of the molecules within it. When molecules have less kinetic energy, they are moving slower on average and thus ...
AL
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Angus L.
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What is the main difference between Mitosis and Meiosis
Well, the main difference between Mitosis and Meiosis is the end product of their respective division. Now the end product of Mitosis is a daughter cell that has the SAME number of chromosomes as the parent ...
CI
Answered by
Chinyere I.
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4056 Views
Describe how a protein is digested
After consumption, food travels down the oesophagus into the stomach, where it is broken down by specific enzymes. The enzyme pepsin is responsible for breaking down a protein into amino acids (the smaller m...
AB
Answered by
Arantxa B.
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Science tutor
6799 Views
Why is Pluto not a planet any more?
When astronomers discovered Pluto in 1930, they were excited to announce it as the 9th planet in the solar system. The problem is, back then we didn't know that Pluto is just one of many objects floating in ...
RM
Answered by
Ryan M.
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6102 Views
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