Table of Contents
How do you make a submarine bottle sink then float?
Put the cap on and tighten it. Place the bottle bottom-side down into a bathtub filled with water. Water will fill the bottle through the holes in the bottom, causing it to sink. When the baking powder reacts with the water inside the bottle, it will release carbon dioxide gas.
Why does a submarine sink and float in the water?
In submarines, this is controlled by ballast tanks. When the tanks are empty, the submarine has less mass and it floats like a normal ship. As water is allowed into the tanks, the mass of the submarine increases, the downward gravitational force on the submarine increases and the submarine begins to sink.
How do you make a submarine out of a soda bottle?
Place your submarine in the bowl and let it fill with water. Your sub should be lying on the bottom of the bowl with the straw sticking out of the water. Now that your submarine is completely under water, blow into your straw. The water blows out of the bottle and the sub will rise.
How can you make a heavy object float?
There are two possible ways to make that object float, however:
- Increase the density of the water so that the water becomes denser than the object.
- Increase the volume of the object so that the object becomes less dense than the water.
Can a water bottle sink?
Similarly, an empty plastic bottle floats on water. However, when you fill it up with water, the bottle sinks. This is because it is unable to displace that much volume of water.
Does a plastic bottle float or sink?
Whereas on the other hand, a plastic bottle filled with sand sinks as the gravitational pull or weight on it is more than the upthrust force of water. Note: Even the plastic bottle filled with water also sinks as it is unable to displace that much volume of water.
How do submarines sink if they’re full of air?
In order to control buoyancy, the submarine relies on special tanks that can be filled with water or air. To return to the surface, the tanks are filled with air. This makes the submarine denser than the surrounding water, which causes it to sink.
How do you make a plastic bottle submarine?
Gouge a hole into the cap of the 20 oz bottle. It is possible to use a sharp knife, screwdriver, or nail to do this. Make sure the hole is just large enough for the flexible straw to fit into the opening. Cut three holes on one side of the bottle. There should be a hole near the bottom of the bottle, one in the middle, and one near the top.
Is it possible to make your own submarine?
Since then, submarines have made great technological leaps and have been used for salvage, search, and military purposes. Submarines can be a tad bit expensive for an average, run of the mill person living during modern times. It is possible to see your own submarine in action in your bathtub, albeit a smaller version of one.
How do you make a submarine out of straw?
Tape the straw to the cap to ensure it stays in place. Gently put the submarine into the water, making sure that the long end of the straw does not completely submerge and take on water. The submarine should sink a bit. Once it stops sinking, blow into the straw to watch it resurface.
How do you put pennies in a submarine?
Place the 12 penny stack under the rubber band nearest to the bottom of the bottle. Ensure the pennies are not covering the holes you made. The should be held in place by the rubber bands beneath each hole. This side of the bottle is going to be the bottom of your submarine.