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Describe how a stationary wave is formed at a boundary?

A stationary wave is a wave formed by the superposition of two progressive waves. These waves must have equal amplitude frequency and speed. They must also be travelling in opposite directions. When a wave i...
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Answered by Oliver E. • Physics tutor
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Describe how action potentials are initiated and transmitted within a neurone, mentioning the appropriate ions and types of ion channels

A stimulus causes a small influx of sodium ions into the cell, leading the cell to become more depolarised or more positive. If this reaches the threshold potential, of about -55 mV, then it will initiate an...
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Answered by Roxanne M. • Biology tutor
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Compare the use of setting by Attwood in The Handmaid's Tale and Orwell in 1984.

Both "The Handmaid's Tale" and "1984" are dystopian novels set in the near-future. The characters in each novel are subject to extreme supervision and control by the governments in power....
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6416 Views

How do I prepare for an Imperial College London Medical School Interview?

The interview is a 15 minute panel interview with 4 or 5 interviewers.They will ask the generic questions of why you want to study medicine and why you want to come to this specific university - so make sure...
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3705 Views

Describe that lock and key hypothesis

Enzymes are biological catalysts, which means that they increase the rate of a specific reaction by lowing the required activation energy. The lock and key hypothesis explains how the substrate (key) fits in...
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Answered by William W. • Biology tutor
8262 Views