Tagged: thermodynamics

BBQ Physics - Physics Stop

Marcus Wilson Jan 19, 2010

Here's another little bit of physics seen in everyday stuff.  When disconnecting the gas cylinder to our camp stove while on holiday, I got a bit of a shock at how cold it was.  It shouldn't have shocked me - that's how it should be. When gas is made to expand it cools down. And in the gas cylinder, compressed gas is … Read More

Climate change - Physics Stop

Marcus Wilson Dec 10, 2009

I feel that, as a physicist, I should be making some reasonable and informed comment on the Copenhagen summit. After all, climate is immensely physicsy. We have fluid flow, conduction, convection and radiation of heat, interaction of electromagnetic radiation with electrons in molecules, scattering of light by small particles, solar activity (on second thoughts, … Read More

Risky things - Physics Stop

Marcus Wilson Sep 21, 2009

I love the headline at the end of last week 'Wellington quake risk halves'. As if you can wake up one morning and find that the chances of an earthquake happening today are suddenly half of what they were yesterday just because someone says so.  What next - someone decreeing that summer will last 12 months of a … Read More

The end of the week… - Physics Stop

Marcus Wilson Sep 18, 2009

Have you ever had one of those days when you have worked flat out all day and seem to have accomplished nothing?I think that's today.  My desk looks like a tornado has been through the office. Now, I wonder, statsitically speaking, how many tornados I'd need to come through before one picked up all the loose bits of paper and … Read More