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Why a cable that transmit voltage increase its lengths?

Because as the voltage and current pass into the cable there is some thermal energy that is generated and for that reason the cable expands.
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Answered by Pablo Q. • Electronics tutor
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In a fluorescent tube, how are the atoms in the tube excited?

As there is a potential difference in the fluorescent tube. Electrons will flow from negative to the positive . These electrons collide with the orbital electrons in the atoms of the fluorescent tube. As the...
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Answered by Shaun W. • Physics tutor
5880 Views

Find D when 8x^3-12x^2-2x+D is divided by 2x+1 when the remainder is -2

8x 3 -12x 2 -2x+D...(1) 2x+1...(2) Assume 2x+1=0 so x=-1/2 8x 3 -12x 2 -2x+D=-2... when divided by (2) substitute -1/2 into all X values rearrange to find D
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Answered by Shaun W. • Maths tutor
4816 Views

How would you differentiate ln(sin(3x))?

To answer this question we require the chain rule, which states that dy/dx=(dy/du)*(du/dx) To use this formula in our question, we can let y=ln(sin(3x))=ln(u) where u=sin(3x) Firstly, using a standard result...
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Answered by Hannah D. • Maths tutor
12734 Views

Explain the Gillick Principle

The Gillick Principle orginates from the House of Lords case, Gillick v West Norfolk and Wisbech Area Health Authority) [1986]. A mother, who was a devout Catholics and didn’t believe in contraception, took ...
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Answered by James R. • Law tutor
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