Directions for Making a Basic Cartesian Diver 1. Snip off the bottom of your pipette, leaving about 2 centimeters or so. 2. Slip a hex nut securely over the remaining portion of the pipette.
How do you fill a Cartesian diver with water?
Before putting your cartesian diver into your bottle of water, you’ll want to fine tune your diver’s density. To do this, take a small cup of water. Place the diver into the cup of water and squeeze the bulb to fill the pipette with some water.
What is a Cartesian diver?
If you’ve never seen a cartesian diver before, it’s basically a little dropper (or other material- there’s so many options) floating in a bottle of water. When you squeeze the bottle of water, the diver drops down through the water. It then floats back up when you release the sides of the bottle.
How does the pipette diver float in the water?
The pipette diver floats in the water at first because there is air trapped inside which makes it buoyant- just like the air inside a balloon or ping pong ball makes it float in water.
How do you test a squidy Cartesian diver?
When testing out your squidy cartesian diver for correct density as described in the directions above, it can be harder to fill because of the legs. We used another pipette to squeeze water into our squidy and then tested him in a cup of water before putting him in the bottle.
How do you make a simple Cartesian diver?
Fit two metal nuts to the bottom of the cut pipette (or add plasticine to the pen cap). Fill the bottle with water all the way to the brim. Float the cut pipette in the water and adjust the weight to allow it to float. Close the bottle and tighten the lid.
How do you make a Cartesian dive with a dropper?
SetupFill the bottle nearly to the top with water.Fill the pitcher with water.Use the water in the pitcher to fill the eye-dropper. ... Place the eye dropper in the bottle, and screw on its cap.Squeeze the bottle, and observe what happens to the diver.
What do you need to make a Cartesian diver?
How to Make a Cartesian DiverEmpty plastic 1-liter or 2-liter bottle with a lid.Graduated pipette.Hex nut (Depending on the size of your pipette)Scissors.Optional: Sharpies to decorate your bottle and dropper.Optional: To make a squiddy diver- electrical tape and disposable plastic glove.
How do you make a Cartesian diver with a pen cap?
0:362:01How to Make a Pen Cap Submarine - Easy and Simple - YouTubeYouTubeStart of suggested clipEnd of suggested clipAnd onto the pen top yep all the way around. So it all holds your pen top holds your paper clip onMoreAnd onto the pen top yep all the way around. So it all holds your pen top holds your paper clip on to the pen top and that gives you a bit of white in a bit of weight when you drop it into the bottle.
How do you make a water bottle diver?
InstructionsCut out your diver using the same shape and size indicated above. ... Cut the straw and position it on the paper-clip as show above. ... Slowly slide the straw onto the diver as show above. ... Place a small piece of play-dough or putty on the diver's feet.Fill a glass with water and put the diver in.More items...
How do you make a Cartesian diver with ketchup?
InstructionsPut the ketchup sachet into a bowl of water to see if it floats upright - if not then add a little Blue Tac to its bottom.Fill the 2 litre bottle with water right to the top.Push your ketchup diver through the neck of the bottle.Put the lid on tightly, squeeze the bottle hard and watch your diver dive.
Why do Cartesian divers sink?
The diver sinks because the increased amount of water in the pipette increases the mass of the diver, which also increases the density of the diver.
How do you make a Cartesian diver with a paper clip and a straw?
AssemblyStep 1: Fold straw or tubing in half and fasten. Straws: The straws are almost 6" long. ... Step 2: Add weight to the diver. Pull the outside end of a paper clip out a bit.Step 3: Fill the bottle with water and test the diver. ... Step 4: Make a Hook Out of Straws, Paper Clips and Tape.
How does a simple Cartesian diver work?
Increasing The Density Once its density is greater than that of its surroundings, it will sink. Release the pressure on the bottle's sides and you stop forcing water inside the eye- dropper. The air inside it will now push out the extra water again, and the eye-dropper will rise. That's the Cartesian Diver!
How do you make a flinker?
How-ToStart by filling the container with water.Place a foam packing peanut in the water. ... Place a paperclip in the water. ... How can you combine these objects to make the peanut flink (so it doesn't float or sink)?Try attaching paperclips to your peanut and/or changing the shape of the peanut.More items...
Would a pen cap sink or float?
Like a pen,as it has a plastic body and a refill in it,its weight is more as compared to that of cap which has air pockets and its is lighter than water. 3. Thus , a pen cap floats but the pen sinks in water.
Why is it called a Cartesian Diver?
The Cartesian Diver, named for the scientist René Descartes who is said to have invented the toy, is an object that ordinarily floats but sinks when it is under pressure.
How does the Cartesian diver experiment work?
Increasing The Density Once its density is greater than that of its surroundings, it will sink. Release the pressure on the bottle's sides and you stop forcing water inside the eye- dropper. The air inside it will now push out the extra water again, and the eye-dropper will rise. That's the Cartesian Diver!
How do you make a Cartesian diver with a paper clip and a straw?
AssemblyStep 1: Fold straw or tubing in half and fasten. Straws: The straws are almost 6" long. ... Step 2: Add weight to the diver. Pull the outside end of a paper clip out a bit.Step 3: Fill the bottle with water and test the diver. ... Step 4: Make a Hook Out of Straws, Paper Clips and Tape.
Why does eyedropper sink when you squeeze the bottle?
Squeezing the bottle causes the eyedropper diver to sink. This is because the increased pressure compresses the air at the top of the eye dropper. This increases the mass (and density) of the eyedropper diver—causing it to sink.
What happens to the dropper as you release the pressure?
Releasing the squeeze decreases the pressure on the air at the top of the eyedropper, and the water is forced back out of the diver, lowering its density and allowing it to float back to the top of the bottle.
What is a Cartesian diver?
Cartesian divers are fun little devices, incredibly entertaining and puzzling. Basically, they use the properties of gas and pressure to make a small weight sink "magically.". The Cartesian diver is named after Rene Descartes, a famous French scientist, mathematician, and philosopher. Steps.
How to make a diver drop?
Remember, you want the water level to be near the very tip so that there is not a lot of air in the bottle. Gently squeeze the bottle to make the diver drop. If you squeeze the sides of the bottle, the diver should plummet to the bottom.
How to fix a diver that is not working?
Troubleshoot the diver if it is not working. Place the diver into a normal bowl of water. It should just barely float, with the air bubble (the top of the dropper, the bend in the straw, etc.) just above the water. Make sure that the bottom is sealed for homemade divers, and add a little more or less water to the eyedropper to get the right balance.
What happens when you squeeze a bottle of water?
But the area it is in gets smaller, so it pushes together against the air bubbles nearby, compressing them into smaller packets of air. But this is like squeezing a sleeping bag together -- it gets smaller, but it still weighs the same amount.
Why does my diver sink?
This causes the diver to sink because it has too much density to keep floating.
What to do if your diver isn't working?
Play with your diver a bit if it isn't working. Make sure it is well sealed.
How to fill a water bottle?
Fill the bottle completely to the top, so that it is almost overflowing. You want as much water as you can get in.
Step 1: Materials
A world where the natural laws are the same as those that physics textbooks suggest.
Step 2: Making the Diver
You can shell out for a professionally made glass diver, which has a hole in its back to allow some water to get in for weight.
Step 3: Preparing Your Bottle
For plastic bottles: Some water bottles have very small necks, so they might not be the best to use.
Step 4: Using the Cartesian Diver
This is the most fun, and also the simplest part of the whole process, if you've done it right. Otherwise, this is the most annoying, frustrating and apocalyptic part (so be careful if you've used a glass bottle).
Step 5: The Science
It's all to do with buoyancy. The diver will contain two substances, water and air. In my diver, for example, the air is trapped in the heart, and the water in the bucket, and in a few tiny pockets on the heart.
Setup
For this experiment, you will need a plastic soda bottle filled with water, and a plastic pipette or eyedropper. You might also need something to add weight to the pipette, such as a few metal nuts.
Instructions: Demonstration
First fill the plastic soda bottle to the top with water. It should be overflowing. Next comes the hard part, you have to add weight to the pipette or dropper you are using so that when you place it in the bottle, it’s barely floating. You can use a combination of adding weight such as metal nuts, and filling the pipette with water to fine tune.
Science Explanation
Squeezing the bottle causes the pipette to sink because you are lowering the volume of water within the bottle, meaning that the pressure of the water has to increase in exchange, since it has nowhere to go when you fill the bottle to the top with water.
Concept Check Questions
What was the density of the pipette in relation to water when you squeezed the bottle, and then released it?
Volume and Pressure in Real Life: Oxygen Video
Volume and pressure can be found in lots of places such as soda cans, plumbing, and even how you breathe. When you breathe in, your diaphram, a muscle attached to the bottom of the chest cavity, contracts, raising the volume in your chest cavity. This in turn lowers the pressure of the air.
Step 1: Supplies
I have assembled a list of supplies that you will need for this project, feel free to skip ahead and see how it's made. 1) 1/2 inch smoothie strawd 2) permanent marker 3) lighter 4) BBS 5) sissors 6) needle nose pliers 7) ruler or measuring devise 8) water bottle or empty 2 liter bottle
Step 2: Prepare Straw
My straws were none inches long, so I cut them in three inch increments, or 7.6 cm peices. Easily mark the measurement with the marker before cutting for precision.
Step 3: The Build
Now you can assemble the diver, start by crimping the end with the pliers, and then heating/ melting the end shut with a lighter. Make sure you have not holes so air can't escape. Full the straw with exactly ten BBS, and then deal the opposite end. Done! Now drop your diver the bottle full with water, cap it and squeeze!
Step 4: Final Thoughts
These toys are great for explaining pressure in chemistry, or for just showing off at parties. Thank you for checking out this instructable, and if you liked this one, you may like my others, so be sure to check those out too. More to come!
How to test if a pipette diver is a pipette diver?
Fill your drinking cup or glass almost full with water (the water should be deeper that the height of your pipette- if not you will need a taller glass). Test that your pipette diver (bulb end up and no water , only air, inside) floats in the glass.
Why does a pipette diver float?
The pipette diver floats in the water at first because there is air trapped inside which makes it buoyant- just like the air inside a balloon or ping pong ball makes it float in water. When you squeeze the sides of the bottle you increase the pressure inside and that pushes more water into the pipette through the open hole at the bottom (you should be able to see it happen). This extra water makes it too heavy to keep floating (or more dense than the water in the bottle) and it sinks. When you stop squeezing the pressure drops and the extra water (and weight) flows back out of the pipette and it floats again.
How to make a balloon fish float?
Fill your plastic bottle completely full of water (all the way to the top), insert your balloon fish and screw on the cap. Squeeze the bottle until the balloon fish sinks, stop squeezing and it should float back to the top. [If you can't make it sink there is too much air inside the balloon.
How to make a diver float?
Squeeze the bottle until the diver sinks, stop squeezing and the diver should float to the top again. [If you can't make it sink, remove the diver, squeeze the bul b and draw a small amount of water into the stem of the pipette. Repeat Step 3 to make sure it still floats, then repeat Steps 5 and 6. If you still cannot make it sink by squeezing ...
Why does a pipette have so little mass?
The pipette had only air inside and thus very little mass because there were very few air molecules (molecules in a gas are very far apart).
How to make a fish out of a balloon?
Leave just a very small amount of air inside the balloon (almost no air at all) then tie it off. Using your drinking cup of water from Step 2 above, test that your balloon "fish" floats.
Can you squeeze a bottle of buoyancy?
Buoyancy can turn raisins into divers, and you don't even need to squeeze the bottle. Buoyancy also makes Lava Lamps work. See the reference links below for more information.
