Mar 26, 2008

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Bake a Quantum Cake

quantum bake

Image

Source http://front.math.ucdavis.edu/0503.7210

Not as silly as it sounds on the first look. It essentially uses the similarities between the diffusion equation and the Schrodinger equation to half bake some ideas.

There is plenty of physics to be learned from/during the baking process. A few years ago, I was involved in a patent dispute related to Pizza Ovens and I had to study up on the the baking process and the time saving techniques that major pizza chains use. Fascinating subject and even more so, if you like pizza.

Cooking is based upon the three elements of thermodynamics: conduction, convection and radiation and many pizzerias makes uses of all three methods to get the pizza to you in 30 minutes or less.

OK, back to the cakes – when can I have my quantum of dessert (dessertino)?

physics_wedding_cake

Source Symmetry magazine

Talk Like a Physicist

Mar 25, 2008

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Tuesday tattoos – keep your equations close to your heart

Physics_tattoo

this is one of the most fascinating and odd equation ever; take e and pi and imaginary numbers, combine them in a seemingly random fashion and somehow everything cancels out and and you get zero!

Source Talk Like a Physicist

Mar 25, 2008

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A water balloon not exploding in high-speed

It is absolutely amazing to watch the balloon bouncing back (not exploding); how it completely flattens, how the elasticity of the balloon wall brings it back together and how the balloon bounces back.

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Mar 24, 2008

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Motionless Monday – three water balloon pierced by a bullet

water_balloon_bullet

You can see the bullet exiting out of the green balloon.

Click for a better view.

Source

Talk Like a Physicist

Mar 21, 2008

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Measure speed of light at home with chocolate and microwave

Pretty simple actually.

You can use chocolate as in this videos, a plate of mashed potatoes, cheese, marshmallows, or even twizzler sticks will do just fine.

Time for experiment:

About 10 minutes (with a calculator. 15 without one. Could be a lot more if you forgot your fifth grade math).

1. Examine the microwave, the rear surface as well as inside the door, looking for a label stating the frequency. If there is no label containing this value, the majority of microwave ovens operate at 2.45 gigahertz.
2. If the microwave has a rotating turn table remove or disable it.
3. Remove the packaging from the chocolate and place on top of a piece of paper towel on a plate
4. Place the plate with the paper towel and the chocolate in the microwave, so that the chocolate is positioned with the longest sides facing the longest sides of the microwave.
5. Heat the chocolate in the microwave until it barely begins to melt, pausing the oven to check occasionally (the time will vary with the oven, from 20 seconds to 90 seconds)
6. Once the chocolate has begun to melt remove it from the microwave, probe the surface for a pattern of hot melted spots, about the dimensions of a dime.
7. Use toothpicks to mark the hotspots, placing them in the center of the hotspots.
8. Measure the distance between the toothpicks, recording the data.

Source Null Hypothesis and/via Smarter than that and Everything2

Next Friday, how to measure radius of the earth

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