Guinea & Feather Apparatus
Product Code : JA-FMDE-7806
The Guinea & Feather Apparatus (SKU JA-FMDE-7806) demonstrates that, in a vacuum, objects fall at the same rate regardless of their weight. This guinea and feather tube is a 50 cm glass tube of 16 mm diameter with two rubber bungs and a 40 cm length of tube for connecting a vacuum pump; with the air removed, a small mass and a feather or piece of paper fall together when the tube is inverted. JaincoLab manufactures it in India for school physics laboratories.
Specifications
The apparatus consists of a glass tube 50 cm long and 16 mm in diameter, fitted with two rubber bungs, and a 40 cm length of tube for connection to a vacuum pump, so the air inside can be evacuated before objects are dropped.
| Product | Guinea & Feather Apparatus |
| SKU | JA-FMDE-7806 |
| Tube | Glass, 50 cm long, 16 mm diameter |
| Closures | Two rubber bungs |
| Pump connection | 40 cm length of tube for connection to a vacuum pump |
| Demonstrates | Objects fall at the same rate in a vacuum, regardless of weight |
Demonstrations with the guinea and feather tube
The tube is used to show that air resistance, not weight, makes light objects fall more slowly: with air in the tube a feather lags behind a small mass, but after the air is pumped out both reach the bottom together when the tube is inverted.
- Demonstrating that all objects fall with the same acceleration in a vacuum
- Comparing the fall of a mass and a feather or paper with and without air in the tube
- Timing the fall of paper at different air pressures to gauge the effect of air resistance
- Supporting lessons on gravity, free fall and air resistance in secondary physics
Scope of supply and ordering
Each unit is one glass tube with two rubber bungs and a 40 cm connecting tube, as described above. The vacuum pump, test objects and quantities are confirmed on the quotation.
Minimum order quantity, lead time and packing are confirmed on each quotation according to the quantity and the delivery destination. JaincoLab supplies school orders, bulk quantities for colleges and education projects, and export consignments to buyers in Africa, the Middle East and South and South-East Asia.
Frequently asked questions
What does the Guinea & Feather Apparatus demonstrate?
It demonstrates that objects fall at the same rate regardless of weight once the air has been removed from the tube.
What are the dimensions of the tube?
The glass tube is 50 cm long and 16 mm in diameter, with two rubber bungs and a 40 cm connecting tube for the vacuum pump.
Is a vacuum pump needed?
Yes. The air must be pumped out through the connecting tube; a hand vacuum pump is listed separately and can be added to the quotation.
Related products
Browse the full Force, Motion and Dynamics equipment range or the complete catalogue from JaincoLab, a physics lab equipment manufacturer in India.
Request a quote
To order the Guinea & Feather Apparatus, send the quantity and delivery destination through the JaincoLab contact page or email [email protected]. Buying under a laboratory tender? Use our tenders page.
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