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What is the force on a moving charged particle in a magnetic field, and why is no work done by this force when it accelerates the particle?

A particle with electric charge q , mass m and velocity v in a constant magnetic field B experiences a force due to the field: F = q v X B The ' X ' ( cross-product ) means that the force is always at 90° ( ...
RP
Answered by Rich P. • Physics tutor
13674 Views

Where did mitochondria come from?

Mitochondria are a fascinating organelle, which we, as humans, rely on for so much. They are where the electron transport chain occurs, where ADP is converted to ATP with the high-energy bond we utilise ever...
PQ
Answered by Patrick Q. • Biology tutor
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How do I find the root of a quadratic equation?

Usually the easiest way to find the root of a quadratic is to factorise it so you have something a form similar to - (x+2)(x-1)=0. From here you need to find a value for x that makes each bracket equal to ze...
NF
Answered by Nicky F. • Maths tutor
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What is the name of the first stage of respiration?

Glycolysis. This is an anaeorbic process whereby glucose is converted to pyruvate via triose phosphate. This process gives out a total of 4 ATP molecules but requires 2 ATP molecules to convert glucose to tr...
AS
Answered by Adam S. • Biology tutor
3891 Views

How do I integrate log(x) or ln(x)?

The integral of log(x) is not necessarily straight-forward. Though we can use the fact that d/dx(log(x)) = 1/x to help us. Rather than simply trying to integrate log(x), we can use integration by parts on 1 ...
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Answered by Daniel F. • Maths tutor
17503 Views