The answer is a surprise.
Even if you have to set up a (free) New York Times account to get access to this example, I think this is an interesting enough reason to do so.
SQA – NQ – Past Papers and Marking Instructions. It’s worth taking a particular look at the rules which examiners have to follow.
Some background material on vectors and matrices.
Richard Feynman describes how much fun it is to think up explanations of the physical world.
Where does PV=nRT , the ideal gas equation, come from?
Here is a nice explanation.
This is my favourite wired.com blog.
I really admire Rhett Allain’s enthusiasm and his willingness to try out explanations of physical phenomena -very publicly.
This gives a clear insight into how physicists (and engineers and applied mathematicians ) think. There is a great deal of working through thought experiments and iterating towards a theory which accounts well for the known observations.
Definitely worth a read-through.
Sometimes, if you aren’t getting a new concept, it’s really useful to hear someone else’s version.
Here is a video about Khan Academy. This represents the future of education and is also a great place to get an additional perspective on a wide variety of interesting topics.
In case you were in any doubt, the scientific literature is not error free. Text books are still frequently written which contain misconceptions (as distinct from poor explanations).
This site offers a pretty strident criticism of many such publications, together with a clearer interpretation of much of the underlying thinking.