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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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Find the first three terms of the binomial expansion of (3 + 6x)^(1/2).

To find the binomial expansion of this expression we need to use a formula. The formula states that for expressions of (1 + x) n it can be written as: 1 + nx + (n(n-1)x 2 )/2 ... As our initial expression do...
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Answered by Brendan W. • Maths tutor
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Using implicit differentiation, write the expression "3y^2 = 4x^3 + x" in terms of "dy/dx"

To differentiate this expression with respect to "x", any terms comprising of an "x" must multiply their powers with their numerical values and subtract 1 from the power. However to diffe...
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Answered by Brendan W. • Maths tutor
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