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What is the gradient of y = xcos(x) at x=0?

First we want to calculate the derivative of y. To do this we use the product rule:If we rewrite y as y = uv, then dy/dx = v du/dx + u dv/dx.Here, we have u = x and v = cos(x).That means du/dx = 1 and dv/dx ...
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Answered by Fraser F. • Maths tutor
4948 Views

Describe the cardiac cycle

The cardiac cycle consists of two phases, diastole and systole. Diastole is when the heart is relaxing, allowing blood to flow into the chambers from the vena cava on the right side and the pulmonary vein on...
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Answered by Alex G. • Biology tutor
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A compound, HOCH2CH2CH2CH2COCl, reacts with itself to give a new compound. Give the IUPAC name for the starting compound, draw the mechanism for the formation of the new compound and give the prominant feature of the IR spectrum of the new compound.

This compound is highly unstable, and it's IUPAC name would be 5-hydroxypentyl chloride . The "hydroxy" part is from the OH alcohol group, "pent" from the number of carbons in the chain, ...
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Answered by David H. • Chemistry tutor
8254 Views

Explain what is meant by ‘price elasticity of demand’

'Price Elasticity of Demand' essentially refers to the responsiveness of Demand with respect to price. It can be understood as the proportional change in demand after a change in price. To calculate the Pric...
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Answered by Zyad A. • Economics tutor
5317 Views

What are the two verbs that help one form the passé composé in French?

The verbs 'être' and 'avoir'. Ie. J' ai pris, or J' etais trop fatigué.
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Answered by Olga M. • French tutor
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