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How do i use chain rule to calculate the derivative dy/dx of a curve given by 2 "parametric equations": x=(t-1)^3, y=3t-8/t^2

(Explain why it is called "parametric"). The definition of chain rule says that we can re-write the derivative dy/dx in terms of the "parameter t" by dy/dx = (dy/dt) X (dt/dx). (Explain w...
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Answered by Adil F. • Maths tutor
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Why is a nucleophilic substitution reaction between ammonia and benzene unlikely?

A nucleophilic substitution reaction is when a nucleophile (an electron pair donor) replaces an atom or part of a molecule. In this scenario ammonia (NH 3 ) is the nucleophile as it contains a lone pair of e...
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Answered by Archit S. • Chemistry tutor
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Explain what a supply shock is, using a relevant example.

A supply shock happens when an event causes an economy's Short-Run Aggregate Supply (SRAS) curve to shift up or down the Aggregate Demand (AD) curve. In the case of a negative supply shock this shift causes ...
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Answered by Arthur V. • Economics tutor
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Describe how the presentation of a virus antigen on a cell leads to the secretion of antibodies against this viral antigen

3 mark question - remember to use key words/phrases the examiner will be looking for to give you the marks. Be concise and specific in your answer - make it as easy as possible for the examiner. Helper T cel...
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Answered by Eleanor M. • Biology tutor
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Give two factors which aid the fossilization process, explaining how each increases preservation potential.

Rapid burial of the organic material will prevent any erosion or scavenging occurring, allowing the organic material to become encased in rock and become more likely too be preserved.Becoming buried in fine ...
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Answered by Ciaran C. • Geology tutor
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