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Which are the types of carrier movements and how are they activated

Drift - As a result of an electric field Diffusion - As a result of a carrier gradient, by other words a difference in the carrier level from one side to the other, usually when we have a p-n junction
JA
Answered by Joao A. • Physics tutor
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‘Too human to be a hero’, To what extent do you think Odysseus behaves in a heroic manner?

To answer this question the student should weigh up Odysseus' actions within the Odyssey, discussing whether his behavoiur is more human or more heroic. The student should conclude their answer by provding a...
IP
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Explain how you would approach the following A-Level exam question: Discuss research into the disruption of biological rhythms (e.g. shift work and jet lag) (8 + 16 marks).

Firstly, one must consider the key words in the question to be addressed in the main body of the essay and also the number of marks available and how they are divided. Here we would highlight "discuss r...
EP
Answered by Elise P. • Psychology tutor
5097 Views

Describe the components of the fluid mosaic model (6).

The fluid mosaic model describes the typical plasma membrane as a phospolipid bilayer (1), composed of phosphates with fatty acid tails, which face each other inwardly. Within the phospholipid bilayer are di...
GC
Answered by Gregor C. • Biology tutor
14778 Views

Suppose a population of size x experiences growth at a rate of dx/dt = kx where t is time measured in minutes and k is a constant. At t=0, x=xo. If the population doubles in 5 minutes, how much longer does it take for the population to reach triple of Xo.

2.925 minutes This question involves solving a first order differential equation via the separation of variables and then substituting in initial conditions in order to find a particular solution. Something ...
SW
Answered by Scott W. • Maths tutor
3765 Views