Pressure

Homemade clouds in a bottle experiment

Homemade Clouds in a Bottle The clouds you see in the sky are formed when water vapor is cooled enough to form tiny water droplets. When moist, cool air rises to a higher altitude, it cools, water droplets are formed, and voila - you have clouds. In this experiment we'll duplicate this same process by causing air in a bottle to rapidly cool. Put a small amount of water into the jar. Just enough to cover the bottom. Place the glove into the jar with the fingers pointing down. Stretch the mouth of the glove over the top of the jar. Carefully insert your hand into the glove being careful not to break the seal. Pull your hand (with the glove still on it) outward…
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Pressure

Can we please lower the pressure in here?

Can we please lower the pressure in here? Named after Daniel Bernoulli, the Bernoulli Principle states that as the velocity of a fluid increases, a decrease in pressure occurs. The mathematician Daniel discovered many new ideas regarding fluids and pressure. For instance, Bernoulli, who had earlier begun to study medicine, wanted to know about the relationship between the rate of blood flow and its pressure. He poked a hole in a pipe and stuck a straw in it and noticed that when the fluid sped up, the liquid rose higher in the straw. Soon doctors all over Europe were poking holes in patient’s arms and sticking little glass tubes in them to test their blood pressure. Ouch! This practice continued for nearly 200 years until…
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Pressure

Build a real working hovercraft!

Build a real working hovercraft! So you want your very own hovercraft. Well once again, Reeko is here to help. Of course it's only big enough to hold a mouse (maybe two if the first one scrunches down real low) but hey, we're not old enough for a driver's license Cut a 4 inch square out of the cardboard. Punch a hole in the cardboard - you may need to get an adult to do this part. If you attempt it yourself be very careful. Make sure you punch the hole in the center of the cardboard. The hole should be the same size as the hole in the spool. Glue the spool to the cardboard on top of the hole. Make sure you glue…
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Pressure

A sucker’s bet – atmospheric pressure experiment

A sucker's bet Funny how we take every-day activities for granted. Take for instance - sucking through a straw. Have you ever stopped to think about how we are able to suck liquids through a straw. What exactly makes the liquid climb up the straw and into our mouths. Well, I know you're just itching to know so here we Fill the jar with water. Poke a hole in the lid just big enough for the straw to fit through. Put the straw through the hole. Seal the hole with clay. Make sure it is sealed tight! Try to suck water through the straw. What happens? When you drink from an open glass of water, air pressure allows the water to travel up the straw.…
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