This experiment awesome way to demonstrate the unexpected effects of low air pressure with an leaf blower. A fast stream of air across the top of this clear tube lowers the air pressure in the tube. As a result, high air pressure below the tube propels the ping-pong balls upward in the tube, in apparent defiance of gravity! The balls are pushed up the tube right into the stream of the leaf blower and off they go.
Pumping the Fizz-Keeper forces molecules of air into bottles, just like inflating a tire. While marshmallows are present in the bottle, this increased air pressure makes the marshmallows shriveled, wrinkly, and shrink. Why? Well, it’s because marshmallows are just sugar and air. In fact, marshmallows are comprised of about 40-60% air. When you increase the air pressure inside of the bottle beyond the regular pressure outside, the force actually crushes the marshmallow’s air pockets. You can use this demonstration to discuss the effects of atmospheric pressure. We sometimes refer to things as being “light as air,” but the truth…
Two identical balloons are inflated to different diameters and connected by means of a tube. A valve controls the flow of air through the tube. Guess what will happen when I open the valve? a) The smaller balloon will get bigger b) The smaller balloon will get smaller c) The balloons will become the same size When the valve is opened, this allows air to flow between the balloons. The smaller balloon then gets smaller and the larger balloon inflates even more. This result is surprising, since most people assume that the two balloons will have equal sizes…
When you blow into the square jug, the air has to change direction and it will follow the surface until it hits a sharp corner, at which point the flow will tend to separate from the surface of the square jug and carry on off to the sides as seen in the video. On the other hand you blow at the circle bottle, the air will tend to stick to the surface even as the surface curves, this is called the Coanda effect. This way the air curves all the way around the circle bottle, and can blow out…
When the matches burn inside the glass, the air inside the glass warms. Warm air takes up more space than cool air. As the air inside the glass gets warmer, it expands and pushes against the sides, creating higher air pressure inside the glass than outside the glass. To restore the balance, some of the high pressure air inside tries to move towards the lower pressure air outside. The matches burns in a combustion reaction. For the matches to stay a light, it needs a constant supply of oxygen. However, when the matches is trapped in the glass, it…
Awesome summer experiment. To set this experiment up you need to put a small whole in the bottle of the bottle. I used a one liter bottle, but you can use any bottle. I used a nail to put the whole in the bottle. Then put the balloon in the top of the bottle and starting blowing up the balloon. When you ready to stop cover the whole with one of your fingers. Now the balloon will stay blown up. If you don’t put a whole in the bottle then you won’t be able to blow up the balloon….
Atmospheric pressure is a considerable force we rarely notice. That’s because air exerts its pressure on us equally in all directions. At sea level, one cubic metre of air weighs around 1.2kg which is roughly the same as a litre of milk. Gravity keeps us and our atmosphere firmly stuck to the Earth but air is a fluid that flows readily, allowing us to move through it with ease. At low speeds it provides few clues of its presence to our senses. Only when we pace through it at speed, or when huge bodies of air get moving as wind…
I made the paper with thick card stock paper. 4 inches (10cm) by 2 inches (5cm). Bend the paper on two slides down. You can try bending the paper shorter or longer to see if you get a better lift. When you spin the piece of card, it moves through the air like a wing. As the air hits the flaps, it is forced downwards. Isaac Newton worked out that if you push something one way, it will push you back; so the card pushing the air downwards means that the air pushes the card upwards. Essentially you…
To start, the bottle is filled about 2/3 full. You can hold the ball on top of the bottle and dip the bottle upside down and then bring it back up right side up. Now try to slow tip the bottle sideways to seal the ball to the bottle. If this does not work then hold the ball with your fingers against the glass and the bottle tipped up. and tip it upside down. Hold the ball loosely against the glass so that water is allowed to leak out. Eventually the air pressure inside the bottle falls to a…
1) If you don’t have aa ping-pong ball with a dent or indentation in it, then use your thumb and make a small indentation. 2) Then place ping pong ball in a galls nearly full of water. 3) Turn on microwave for 1 minute 4) Using a oven mit remove the glass. Be careful as the water will be very hot. Remove ping pong ball and Observe. Science behind this experiment As the ping pong ball is heated, the air inside will be heated as well. As the molecules of air are heated, they will begin moving faster. AS…
1.) Fill 2 liter bottle to the brim with water 2.) Place a deflated balloon over the mouth of the bottle 3.) Poke a small hole in the side of the bottle, bear the base, with a nail 4.) Observer the behavior of the balloon 5.) Lift the balloon up into the air and pull up on it several times until it gets pushed down into the bottle. Observer the distance the water travels through the hole as you are dong this. 6.) Once the balloon is inside the bottle and completely inverted, blow air into it to inflate it….
Here’s how to make your own Baking Powder in less than a minute. 1 teaspoon baking soda 1 teaspoon cream of tartar Mix both together and you have Baking Powder. After you get your submarine ready, put some Baking powder in the bottom and let it sink to the bottom. The baking powder will come in contact with water, which will in turn cause a chemical reaction. This reaction will produce air bubbles along the bottom of the potato, causing it to rise back to the surface. When the submarine gets to the surface, the bubbles will…
Centrifugal sprinkler this is a very fun and messy Hands-on experiment (physics, mechanics, inertia, centrifugal force, pump). A straw and a skewer can turn into a pump with a twist of your fingers! Once you have secured anything you want to stay dry, this fun experiment is a good way to introduce centrifugal forces and the principle behind many pumps. When you spin the straw it forces the water inside to spin. If an object is spinning anything on that object appears to feel a force pushing it outward. This means that in your straw the water is…
Like everything else, the balloons are surrounded by air pressure. When I blew between them with the straw, I changed the pressure. Either the air between them stopped pushing as hard, or the air on the outer sides began pushing harder. Which do you think happened? As air squeezed between the balloons, it sped up, and lost pressure, and stopped pushing as hard. So the higher pressure of the air on the outer sides of the balloons pushed them together. What would happen if you blew along the outer side of one of the balloon? When I blew on…
This baking soda experiment boat is a fun hands on experiment. To make it go farther try doing it in the bathtub. You can also experiment with the amount of baking soda and vinegar you add to see if it goes faster or farther. What’s going on? If you mix baking soda and vinegar, you get a chemical reaction which creates carbon dioxide gas. When this happens inside your bottle boat, the gas only has one way to escape, and that’s out the straw. The gas flying down the straw and out the back pushes the boat forwards. …
Air pressure outside the balloon pushes the air in the balloon into the bottle which takes up more space and pushes the water up the straw and out. You can put a valve between the balloon and the bottle or a clothespin to stop the air and make your own drinking fountain.
The Wind powered balloon pinwheel is an example of Newton’s Third Law of Motion, which states that for every action there is an equal and opposite reaction. When you have blown up a balloon and let it go you’ve experienced this law by watching the balloon fly around as the air comes out. Air has mass and is made of molecules. The air molecules that are pushed out of the balloon push against the molecules in the atmosphere creating a reaction force called thrust that acts on the balloon. Thrust acts on the balloon with equal force, and in the…
This Fun and easy experiment is great for kids. Taping different color pieces of paper or tape on the propeller to make fun designs. When you blow into the straw and an air exits from the first and second incisions. Thus, the air turns propeller. The faster you blow the faster the propeller will spin.
How to discover how air pressure affects the operation of a drinking straw? 1) Please a straw in your mouth with the other end in the glass of water. 2) Place a second straw in your mouth, but do not place the other en in the water. 3) Attempt to drink from the first straw. Are you successful? Science behind it. You do not actually suck liquid through a straw. Air pressure pushing on the surface of a liquid forces liquid up the straw and into your mouth. SAY WHAT? This happens when you reduce the pressure inside…
Materials: Stove, Drill, Jar with lid, clear straw, frying pan and food coloring. Safety Precautions: Perform only under adult supervision. Excise caution with hot water. Handle jar bottle with pot holders as the water is very hot. Procedure: Drill a hole in the in the top of the jar lid so that a drinking straw will fit snugly through it. Fill the jar with water to the brim. add a few drops of food coloring. Place lid on the jar. Insert straw through the hole in the jar lid so that it touches the bottom of the jar….