By Vicki Cobb
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Additional info for Squirts and Spurts: Science Fun with Water
Example text
Do it outside, if you want to stay out of trouble, and don't squirt anything except water. There are many inventions that shoot water and other liquids. Some make spouts and some make sprays and some make both. Inventions that squirt and spray liquids make our lives easier. Go on an invention hunt around your house. How many can you find? What problems do they solve? Here are some examples to get you started: Page 6 Once you understand how these inventions work you can make some squirting and spraying devices of your own.
The pressure travels from the master cylinder into the slave cylinder. Inside is a round piece of metal called a piston that rises as the pressure on it increases. The rising piston has a platform on the end that holds the car. When the car is fully lifted, the mechanic closes a valve so the pressure on the fluid stays high in the slave cylinder, and the car stays up. When it's time to let the car down, the mechanic opens the air valve and the hydraulic fluid valve. The pressure gradually goes down, the piston in the slave cylinder goes down, and the car goes down.
What happens to the spurts when you make bigger holes in the bottle than the pin can make? Use a nail and find out. Page 11 Page 12 3 A Super-Leaky Spray Bag Water presses on all the surfaces it touches. It presses on the bottom of a bottle and on its sides. The bottle with holes in the last experiment showed that water pressure is greatest at the bottom of the bottle. But it also showed that there is pressure near the top. When you squeeze a container of water, you add your force to the water pressure.