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Find current and voltage across resistors R1 and R2, when they connected in parallel and in series. A 12V battery is connected, R1=4Ω and R2=3Ω.

First of all, we try to find a circuit where resistors are connected in parallel. When resistors are connected in parallel, the voltage across each resistor is exactly the same, V1 = V2 = 12 V. On the other ...
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Answered by Egle A. • Physics tutor
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Between 2010 and 2015 the average price of tea in the UK increased from £7.20 per kilo to £8.48 per kilo. Over the same period the quantity of tea purchased fell from 97 million kilos to 76 million kilos. Find the price elasticity of demand

price elasiticy of demand is determined by the percentage change in quantity demanded divided by the percentage change in the price of a good. Therefore, to find the elasticity of demand, you must find the p...
Answered by • Economics tutor
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How can I understand enzyme-substrate function?

The best way to understand the enzyme-substrate mechanism is to imagine a baseball glove, and a baseball (photographed on the screen). The baseball glove is designed to fit the baseball. Therefore, the ball ...
Answered by • Biology tutor
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Find the turning points of the equation y=4x^3-9x^2+6x?

To find the turning points, first find the first derivative of the equation by differentiating. Differentiating can be done in this equation by multiplying the number in front of the x by the power then lowe...
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Answered by Douglas R. • Maths tutor
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Explain how a hydroxynitrile is produced from a ketone

Hydroxynitriles are produced from ketones by a nucleophilic addition reaction. The negatively charged cyanide ion from KCN is attracted to the partially positive carbon on the carbonyl group. This causes one...
Answered by • Chemistry tutor
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