Animation on conduction

Eureka! is a TV series that was produced and broadcast in 1980 to illustrate concepts in physics through humorous comic episodes.

Thermometric properties

Found this off Youtube and shared it with my students in 3H today.

Give your ice a lift

Explanation:

Salt is sprinkled around the thread/stick and salt water has a lower melting or freezing point than pure water. The ice cube melts at the places where salt is sprinkled. Temperature of this water above the ice cube is below 0°C.

When salt dissolves in more of the melted ice, the solution gets more diluted, increasing the freezing point closer to 0°C. As the water has temperature a few degrees below 0°C, it freezes again.

ʎɹʇuǝ uʍop ǝpısdn uɐ

(= ˙˙˙ɯɐɹƃoɹd ʇdıɹɔsɐʌɐɾ ǝɯos ƃuıʇsǝʇ ʇsnɾ 'ןןǝʍ ןןǝʍ

One-week term break

Sound inquiry

Hi students,

Here are some of the links where you can hear and see more about sound wave: Sound Wave Applet | Online Tuning Fork | Virtual Keyboard

Learn more about Bell Jar Experiment here:
Science of Sound - Bell Jar | Bell in a Bell Jar - An Interactive Animation

We will take a look at the bell jar experiment when we go to the laboratory on 23 March 2010. Please fill in this pre-activity online worksheet before our lab activity on 23 March 2010.

Cosmic rays

When going through EM spectrum slides (after the little pop quiz based on the EM spectrum song) with 3H today, we read that 2 of the sources of gamma rays are radioactive substances and cosmic rays and some of you have questions about cosmic rays.

I have found a link for you to read if you are interested in finding out more about cosmic rays: Read more about cosmic rays here.