Check out this video by Beau Rainey about the life of Little Shop of Physics interns.
The Little Shop of Physics Open House takes place every year on the last Saturday of February at the CSU Lory Student Center. This free public event always draws a crowd, and this year is was no exception. Over the course of the day, approximately 10,000 people came to do science with us!
The week Rachel shows us this awesome experiment using a wireless baby monitor and a microwave oven along with some bottles of water.
During the first week of October, LSOP visited Fort Washakie School on the Wind River Reservation. All 500 students got to spend 45 minutes exploring our 100+ hands-on science experiments.
Eva has an egg and a bottle. The egg will not fit in the mouth of the bottle. She uses two different methods to get atmospheric pressure to push the egg into the bottle. The first method uses hot water, some of which evaporates. The water vapor displaces the air inside of the bottle. When the bottle is cooled, the vapor condenses into a liquid, which decreases the pressure inside of the bottle. The second method is similar, but uses a small fire to heat the air inside of the bottle, causing the air to expand. When the flame goes out, the air cools, lowering the pressure on the inside of the bottle.
Continuing on our theme of atmospheric pressure, this week we experiment on increasing and decreasing pressure, and how it affects the air trapped inside of marshmallows.
Last week, we showed you how atmospheric pressure can be used to give a giant “bear hug”. This week, we use atmospheric pressure to crush a metal can.
A plastic bag is connected to a vacuum pump. Initially the air inside the bag pushes out with the same force as the air outside of the bag pushing in. However, when the air is pumped out of the bag there is nothing to counteract the atmosphere squeezing the bag against the bear.
Last time we saw that we can separate mixtures by using size and magnetism. This time we use density to separate a mixture. This process is used to separate different types of plastics so that they can be recycled.
River sand is a mixture: it’s a combination of many types and sizes of materials that are combined together without being chemically bonded to each other. Mixtures can be unmixed, or separated into component parts using various physics techniques.