Application:

Sound propagation experiment

The bell on the bell with a bell above the sound of the bell, bells can still hear a clear electric bell, and then extract the air bell, electric bells will gradually weaken until the sound can not hear, close the exhaust valve , So that Students observe, bell bell hammer is still kept ringing bell, but can not hear the sound.

2. Low-pressure boiling test.

A cup of hot water has discharged boiling into the bell jar, and then pumping, you can see the cup of hot water and boiling up. In addition the instrument can also be used: vacuum fountain, evaporation icing, vacuum coating, atmospheric pressure and Other experiments.

 

Specification:

Max height: 28cm

Max diameter: 18cm

Main material: glass and plastics
Weight:1.6kg

 

Note:

You need a vacuum pump to do the experiment.