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wave-particle duality electron experiment February 16, 2010

Posted by mrmackenzie in : AH Physics, podcast , add a comment

I found this video on youtube. It is a good demonstration of electrons behaving like waves or particles, depending on their energy.  Can you explain why the electron energy is important here?

There is a second video explaining how the electrons are produced if you are interested.  Watch it here.

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Centripetal acceleration and Isaac Newton February 6, 2010

Posted by mrmackenzie in : AH Physics, podcast , add a comment

It’s a few months since  we looked at centripetal acceleration in class but I thought I would share this article I found.  I wonder how many people would dare to “co-write” a physics paper with Isaac Newton?  The article is worth a read and I have attached a download link below.

While we’re talking about centripetal acceleration, Rhett Allain’s blog post that led me to the article is also very interesting.

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Int2 Forces HW Q5 January 9, 2010

Posted by mrmackenzie in : Intermediate 2, homework solutions, podcast , add a comment

Here is the video answer to Q5.

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Int2 Forces HW Q 4b January 9, 2010

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Solution to Q4b is attached below.

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Int2 Forces HW Q4a January 9, 2010

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Here is the answer to Q4a.

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Int2 Forces HW Q3 January 9, 2010

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Answer to Q3 is attached below.

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Int2 Forces HW Q2 January 9, 2010

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Solution to Q2 on Newton’s 2nd law (F=ma).

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Int2 Forces HW Q1 January 9, 2010

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Here is the overdue solution to Q1 of the forces HW.

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S4 – answer to HW Q5 December 4, 2009

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Answer to HW Q5 is attached.

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S4 – answer to HW Q4 December 4, 2009

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Here is the answer to HW Q4 on acceleration.

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