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Frey Scientific Vacuum Bell Jar Demo, 5 Pieces
About This Item
Description
Show your students how sound needs a medium to travel through with the Frey Scientic Vacuum Bell Jar Demo. Remove air from the jar. . .and listen as sound radiating from the bell gradually fades to silence! Kit includes a glass bell jar (6-1/2 D x 9-3/4 inches and 5 pounds of weight), vacuum base plate (8 D x 1-1/2 inches), gasket, hose, and battery-operated ringer electric bell (2 AA batteries sold separately). Bell jar has a vacuum pressure of less than/equal to --.06 MpA; rating of 3 VDC; withstands pressures from 14 to 104 degrees Fahrenheit (-10 to 40 degrres Celsius) at 85 percent of humidity. Full functionality of demo requires a vaccum pump (sold separately) to demonstrate the release of air.Features
- Simply connect a vacuum pump (sold separately) to airtight glass bell jar to experience sound and its intensity
- Students will notice that sound fades as the air pressure falls within the jar
- Sound will stop completely as all the air from jar gets pumped out to create vacuum inside
- Bell jar is made of break-resistant, sturdy acrylic for safe, unbreakable handling by students
- Vacuum bell jar demo set offers fun and classic experiment to demonstrate sound waves needing a medium (of air, liquid, or solid) in class or home
Shipping Type:
parcel
Free Shipping:
true
Specifications
Certifications:
Not Applicable
Maximum Age:
12 years
Allergens:
Contains No Allergens
No Choking Hazard