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Find the equation of the straight line passing trough the points (-2,1 ) and (1, 4).

Firstly you need to understand the question. It asks for the equation of a straight line, which is linear, thus of the form y = mx+c. Now, knowing that the equation is of that form we firstly need to find th...
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Answered by Alin G. • Maths tutor
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A batch of Titanium(iv) Chloride is electrolysed in a chemical plant. (a) State the type of bonding in Titanium(iv) Chloride and why it has to be molten in order to undergo electrolysis. (b) Explain why a DC current has to be be used for electrolysis.

(a) Ionic bonding. Ions are free to move/flow(b) So only one product is produced at each electrode OR So that the cathode/anode stays negative/positive which allows only the positive/negative ions to reach t...
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Answered by Azhar S. • Chemistry tutor
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Describe how the small intestine is adapted for efficient glucose absorption. (3 marks)

The small intestine has a very large surface area to increase the amount of area that glucose can diffuse out of the small intestine into the bloodstream. The large surface area is created by villi, which ar...
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Answered by Morgan H. • Biology tutor
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To what extent was the Vietnam War the major turning point in US foreign policy between 1898 and 1991?

Between 1898 and 1991 American foreign policy encountered three major turning points: The moveto imperialism and global expansion beginning in 1898; the inward turn to isolationism following thefinancial cra...
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Answered by Isobel T. • History tutor
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Explain why the number of organisms typically reduces along a food chain

The number of organisms reduces because between each level of the food chain about 10% of energy is lost through movement, through not the full organism on the previous level being eaten as bones and hair ar...
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Answered by Anna S. • Biology tutor
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