All posts by admin

Lead Bell

[youtube id=”848JnOaKKUU” width=”405″ height=”228″]

Demo: TH-A-LB
Pira Index: 4A 40.10

Demonstrates the effects of temperature on the properties of materials.

Electrostatic Twirl

Demo Code: EM-A-ET
Pira Index: 5A 20.10

Video link: Electrostatic twirl

Lab Equipment Direction
1. 3 PVC pipes (exactly alike)

2.  Lab Stand

3.  String

4. Short lab Pole

5. 90 degree clamp

6. Paper towel

7. Plexiglass charging rod (same size as PVC)

1.  Suspend one PVC pipe on a string as shown and loop the straight string over the lab pole. 2.  Charge the suspended pipe by rubbing it with paper towel.3.  Charge another pipe and bring it near the suspended one. Observe.

4.  Charge the 3rd pipe and bring 2 charge pipes near the suspended one. Compare the effect of two pipes with the effect of only one pipe.

5. Charge the acrylic rod w/the paper towel and watch it attract the hanging PVC pipe.

Fuel Cell

[youtube id=”k8bMyqd7xUc&feature=c4-overview&list=UUJm707yMJlGpl9oCMpKtLGQ” width=”405″ height=”228″]

Demo: MP-A-FC
Pira Index: 7A 10.90

Demonstrates the solar breakdown of water and the recombining of hydrogen and oxygen to release electrical energy.

Mechanical Equivalent Of Heat

Demo code: TH-B-ME
Pira Index: 4B 60.11

 Lab Equipment  Directions
  1. Syringe with special iron shavings inside & attached thermocouple
  2. Fluke multimeter
  3. 80TK temperature module
  1. Connect the 80TK module into the multi-meter as shown.  Plug the thermocouple probe into the module and turn the multi-meter to the mV setting.  Switch the module to °C and observe the temperature.
  2. Shake the syringe up and down 100 times and again observe the temperature.

Demo Electroscope, video

[youtube id=”zISeODluhh8&feature=c4-overview&list=UUJm707yMJlGpl9oCMpKtLGQ” width=”405″ height=”228″]

Demo Code: EM-A-DE
Pira Index: 5A 10.10

Demonstration showing the presence of static charge.

Super Cooled H2O

[youtube id=”xP0iwiTOt8U&feature=c4-overview&list=UUJm707yMJlGpl9oCMpKtLGQ” width=”405″ height=”228″]

Pira Index:

While ice at standard pressure will melt zero degree C, water can sometime be cooled below this temperature and remain a liquid. This is an example of supercooling. Liquid water in this state is unstable. Ice formation can be nucleation site. As the ice forms, the temperaturre will increase due to the latent heat of the ice water transition of 80 calories/gram.

thanks too

Video by Christine Hanson
Demo Description by Dr Steven W. McCauley