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Describe how to separate hydrocarbons of different lengths

Heat the oil up until it is a vapour Pass into fractionating column Negative temperature gradientHydrocarbons of different lengths have different boiling points They condense at different heights and are col...
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Answered by Mia N. • Chemistry tutor
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How does DNA replicate?

The first stage involves transcription within the nucleus, the gene of interest is unzipped from it's double helix by enzyme DNA helicase. once single stranded a piece of mRNA which is able to fit through th...
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Answered by Talvin R. • Biology tutor
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Choose 3 types of malware, describe them and the ways in which they may harm a device.

Virus: This type of malware is able to self-replicate, it is deployed once the user opens its host files- possibly in the form of an E-mail attachment. Once opened the virus will become a memory resident, on...
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Answered by Talvin R. • Computing tutor
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Integrate lnx with respect to x

= xlnx - the integral 1/x X x with respect to x= xlnx - the integral of 1 with respect to x= xlnx - x + c
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Answered by Sam B. • Maths tutor
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What is inheritance in object-oriented programming?

Inheritance is a useful and powerful concept in object-oriented programming languages, such as Java and C++. Inheritance is used to provide subclasses with the same instance variables and operations as the s...
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Answered by Ryan F. • Computing tutor
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