Perhaps you noticed the water flowing through the siphons slowed down as the top jar emptied out. Why would it do this?
Is this slowing related to less water in the jar so the mass is less making the water pressure on the siphon less?
When people go down to the bottom of the ocean, they go in small vehicles called bathyscaphes with very thick windows. Why is the glass so thick?
Question: What is water pressure?
Thin plastic water bottle, empty
Place the empty water bottle on the scale to mass it
Take the bottle off the scale and pour 1 cm water in the bottle
Mass the bottle and water
Take the bottle off the scale
Pour 1 cm water in the bottle
Mass the bottle
Repeat this until the bottle is full or the scale can not have more mass on it
Masses of bottle and water
What happens to the mass of the bottle and water each time you add more water?
If you were a bug standing on the bottom of the bottle, how much mass would be resting on your back when the first water landed in the bottle?
How much mass would be resting on your back when all the water is in the bottle?
Pressure is how much mass is resting on a certain area. As you add water mass to the bottle, what is happening to the water pressure on the bottom?
Water has a mass of 1 g for each cubic centimeter. If you were standing under a column of water a meter (100 cm) tall, how much mass or water pressure would be resting on you?
What if that column of water was 10 meters (1000 cm) tall?
Why are the windows of the bathyscaphes so thick?
What I Found Out:
Every time I added water to my bottle, the mass increased. Only 58.8 g of water would sit on my buggy back when the first centimeter of water arrived in my bottle. I’m glad I’m not a bug on the bottom of the bottle when the bottle was full because I would have 510.0 g of water sitting on my back.
Since the area the water was resting on did not increase, the water column kept getting taller and heavier putting more pressure on that same area.
A column of water 100 cm tall would put 100 g of mass or pressure on my shoulder. But a column 1000 cm tall would put 1000 g of mass on my shoulder.
Bathyscaphes go to the bottom of the ocean, miles down. A mile is about 1.5 km or 1500 m or 150,000 cm which is 150,000 g or 150 kg of mass. [A kilogram is about 2.2 pounds so that is 330 pounds.] This would break a regular window. The thick glass is harder to break with the pressure.