Bernoulli Bag, 4 Pack
It's almost impossible to believe it can be done with just one breath. But with Bernoulli's principle you can prove it is so!
Use these windbags to demonstrate that fast flowing air creates lower pressure, which pulls extra air into the bag, filling it up with one or two breaths. These bags are so light and strong that even the smallest scientist can demonstrate Bernoulli's principle and the amazing properties of air!
Teach your students how Bernoulli's principle is used by firefighters, hot-air balloon pilots, weather systems and the aviation industry. Science in a bag!
- 4 Plastic Windbags (2.4m x 25 cm)
- Instructions & teaching tips
This principle is used to explain many phenomena in nature such as how musical instruments produce sound and how baseball pitchers are able to throw a curve ball.
These windbags also work on this principle. When a fast moving stream of air is blown into one end of the tube, surrounding air rushes into the fast moving low-pressure stream increasing the volume of air entering the tube. Thus, one strong blow into the bag picks up enough surrounding air to fill the bag.
- Properties of air molecules
- The Bernoulli Effect
|Age Group||9-10 Years, 11-12 Years, 12+ Years|
What are the shipping costs?
FREE Shipping is available on all orders over $120 to anywhere in Australia!
Orders under the value of $120 incur a low flat rate shipping cost of only $9.95 to anywhere in Australia.
Express, Registered and International delivery options are also available. The cost for these premium shipping services will be automatically calculated during the checkout process. Please conact us if you have any queries with these services.
In some cases we may need to apply a shipping surcharge to large or fragile items, especially to remote or non-urban locations. You will be contacted by us for confirmation if this additional charge is applicable.
How long will it take for my order to arrive?.
You should receive your order within 2 to 4 working days, although to some regional and out back areas it can take up to 2 working days longer. Orders going to WA also take a little longer, up to 6 working days.
All standard orders are shipped using Australia Post's eParcel service, so you'll be kept fully informed of the progress of your order during its journey to you. Aside from receiving regular email updates, you can enter your tracking number into Australia Post's website at any time for information about the delivery status of your order.
International delivery will take from between 1 to 4 weeks depending on the destination and potential customs clearance delays.
When will my order be shipped?
We ship every Victorian business day. Orders received and paid for by 12pm AEST time will generally be shipped the same day.
If you require your order urgently, we have a next day delivery express service available.
What locations do you ship to?
We ship to both Australian and International customers.
What shipping options are available?
The majority of orders are shipped using Australia Post's trackable eParcel service, with larger orders being sent by national courier.
We also have options for express or registered post. A number of international delivery options are also available. These can be selected during checkout.