Vac-Hand

$25.00 incl GST & delivery

A latex glove, dry sand and reduced air deliver this amazing and thought-provoking demonstration.  Insert the vacuum valve in the glove, fill with one cup of sand or seeds, tie it up and suck air from it with the pump.  Now pull and stretch the fingers and amazingly they get locked into position . . .  Re-do it with coarser fillers such as lentils, mustard seeds, etc. to see grizzly textured skin effects on the glove.  Be warned! As the air seeps back, the hand generates peculiar, life-like sounds and movements.

Why does this happen?  What does it teach about atmospheric pressure?

This kit is a great teaching aid but also a great conversation starter about our atmosphere and its invisible fast-moving gas particles.  Have fun!

SKU: G01 Category:

Description

What is in the kit?

Supplies so you can prepare 10 hands, 2 at a time

2   Vacuum valves
1   Vacuum pump
10  Latex gloves
1   Instruction sheet
You supply:
1 cup of polenta, raw sugar or sand per hand

Vac-hand Pack2
Hand3.1
Hand3.2
Hand3.3 2

The Instructions

Selecting a filler medium:

The following two products,

Polenta (coarse)  and
Sesame Seeds

perform very well in this demonstration.  Do not mix them, use each on its own. They have the right consistency and particle size distribution that enhance the feel. Try to locate them and use them instead of sand. You’ll need at least 1 cup.

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Vacu-Hand Instructions A6
Vacu-Hand Instructions A6 copy

Create a weird skin effect

Fill the gloves with any of these fillers to create a peculiar skin effect.  We have used the following coarse fillers with great success.  What have you got in the pantry? Tip: Do not use fine products where small particles can sneak through the fabric and block the valve.  Cornflour and castor sugar is definitely out.

Filler6
Filler5
Filler2
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All material Copyright, 2019 EduScience Pty Ltd

Additional information

Pack Quantity

Pack of 24 boxes, Pack of 12 boxes

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