Fockety Vacuum Bell Jar with Base, Bell in Vacuum Jar Transparent PVC Vacuum Demonstration Hood Vaccum Demonstration Kit Sound Physics Demonstration

【VACUUM SOUND JAR】The bell in a vacuum apparatus can be used to demonstrate several properties of a vacuum such as Boyle's Law, inability for sound to propagate in a vacuum. The operation of the sound physics demonstration is very simple, so students can have better and happier learning in class., 【VARIOUS VACUUM EXPERIMENTS】A cup of boiling hot water has been discharged into the bell jar, and then pumped, you can see that the hot water in the cup is boiling again. In addition, this instrument can also be used for experiments such as vacuum fountain, evaporation icing, vacuum coating, and atmospheric pressure., 【SIMPLE OPERATION】Place the electric bell in the jar, and you can hear a clear bell, and then pull out the air, the bell will gradually weaken until no sound can be heard. Close the exhaust valve, so that students can observe. The bell still keeps ringing, but no sound can be heard. Notice: you need a vacuum pump to do the experiment., 【QUALITY MATERIAL】This bell in acrylic vacuum jar aparatus adopts premium PVC material, the transparent hood can clearly demonstrate the electric bell inside, very easy to check. This vacuum sound jar comes with a light weight and a compact size as well, the whole vacuum bell jar set is very convenient to carry to outdoor., 【100% QUALITY ASSURANCE】We are very confident in the quality of this vacuum bell jar & plate, and provide 24 months warranty or refund for it. Please feel free to reach us if you have any questions about your purchase. We will solve your problem within 24 hours.

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