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How do I access top marks in an extended response for A-level religious studies?

Perhaps the most crucial piece of information you should remember when composing extended responses in essays is the importance of your own argument! Whilst you may spend the majority of your revision time w...
TD
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How does phagocytosis occur in macrophages?

A macrophage attaches to a pathogen by the receptors on the pathogen and macrophage binding. The pathogen is then engulfed and a phagosome forms, where a vesicle surrounds the pathogen. A lysosome moves towa...
HM
Answered by Hamza M. • Biology tutor
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What is the change in temperature of 2kg of water heated by a kettle using a voltage of 230V at 0.5A of current for 10 seconds? Assume no heat losses.

specific heat capacity of water, c = 4200J/kgK First student should understand that due to no heat losses the energy provided by mains socket to kettle is the same energy as the heat which changes the water ...
WS
Answered by Will S. • Physics tutor
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Explore the view that there is no clear distinction between Blake's depictions of innocence and experience

Although most poems in Blake's 'Songs of Innocence and Experience' can be paired together, the two "Holy Thursday"'s and "The Chimney Sweeper"'s are perhaps best placed to directly compar...
Answered by • English Literature tutor
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Use the geometric series e^(ix) - (1/2)e^(3ix) + (1/4)e^(5ix) - ... to find the exact value sin1 -(1/2)sin3 + (1/4)sin5 - ...

S = e ix - (1/2)e 3ix + (1/4)e 5ix - … is an infinite geometric series, equal to a/(1 - r). a = e ix and r = (1/2)e 2ix thus S = e ix /(1+(1/2)e 2ix = 2e ix /(2+e 2ix ). Rationalising the denominator: S = 2e...
AB
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