Name: ______
Bernoulli’s Principle Mini-Labs
Today you will be doing numerous mini-labs that demonstrate Bernoulli’s Principle. You will be blowing through a straw in most of the labs. Carry the straw with you and blow in the same end so you are not spreading germs to your classmates.
At each station you will find the lab materials and the lab title/explanation card. First look at the title and materials and try to figure out the Bernoulli “trick.” If after a minute you can’t figure it out, flip the card to the explanation side and complete the lab. You will have 3 minutes per station (with time at the end of class to revisit ones you need).
The lab write-up for these mini-labs is pretty simple. All you need to do is:
1)Write your name.
2)Write the title.
3)List the materials
4)Write a simple procedure.
5)Write the result/outcome.
6)Draw a picture (or series of pictures) that shows how the materials demonstrate Bernoulli’s Principle. *Note: you must include arrows for the fluid flow and you must mark the high and low pressure areas.
7)Write a one or two sentence explanation as to how the Principle is demonstrated. *Note: you must include mention the fluid’s flow and the creation of the pressure areas and the action that causes.
The back of this page shows my lab write-up for the example we did together.
Feel free to use it as your guide. Before you start the labs, you need to write two definition/explanations:
Bernoulli’s Principle: ______
______
Fluid: ______
______
Remember: The movement always goes from areas of higher pressure to areas of lower pressure.
The mini-labs are:
-defy gravity-kissing balloons-leaning ping-pong ball
-flying sheet-tubular-super soda
-newsprint love-collapsing tent-hovering
-floating balloon
Name: ___Goetsch______
The Fountain
Lab Materials:
2 half straws
1 cup
water
Procedure:
1)Fill the cup half way with water.
2)Hold one of the half straws vertically in the water.
3)Use the other half straw to blow across the top of the straw.
Result:
Water spurts out of the straw (in the water) like a fountain.
Pictures:
Bernoulli Explanation:
There is air pressure pushing down on the water in the cup. When I blew air through the straw, it was moving faster so it had less time to push on the water in the straw. That caused there to be low pressure above the straw and higher pressure in the straw, forcing the water to spurt out of the straw from the high pressure area to the low pressure area.
Defy Gravity
Defy Gravity:
1)Take a small funnel and a ping pong ball.
2)Hold the funnel vertically with the small end up and the large opening down.
3)Hold the ping pong ball up as far as it will go in the large end.
4)Blow into the small end and let go of the ping pong ball.
Kissing Balloons
Kissing Balloons:
1)Hold the straw and have the balloons hang down at the same level.
2)Use your straw to blow between the balloons.
Leaning Ping-Pong Ball
Leaning Ping-Pong Ball:
1)Hold the string.
2)Let the ping-pong ball hang about two inches to the side and below where the water will flow out of the faucet.
3)Turn on the faucet and swing the golf ball into the water stream.
Flying Sheet
Flying Sheet:
1)Hold a sheet of paper against your bottom lip.
2)Blow across the top of the paper.
Tubular
Tubular:
1)Hold the tube vertically.
2)Place the ping pong ball in the tube.
3)Blow forcefully across the open end of the tube.
Super Soda
Super Soda:
1)Place several straws on the table (lined up side by side, slightly spread apart).
2)Place two empty soda cans upright, on the straws, about 2 inches apart.
3)Blow directly between the cans.
Newsprint Love
Newsprint Love:
1)Hold two sheets of newspaper 4-5 inches apart.
2)Blow in between them.
Collapsing Tent
Collapsing Tent:
1)Fold a sheet of paper in half.
2)Make a “tent” with it on the table.
3)Blow into the tent.
Hovering
Hovering:
1)Place one end of the straw in your mouth.
2)Hold the ping pong ball to the other end.
3)Tilt your head so the straw is vertically with the ping pong ball towards the ceiling.
4)Blow through the straw and remove your hand from the ball.
Floating Balloon
Floating Balloon:
1)Place the fan so it is blowing straight up.
2)Turn it on.
3)Place the balloon in the air stream and let go.
4)Slowly tilt the fan approximately 15 or 20 degrees.
Goetsch11/13/2018PHY Bernoulli mini-labs