# Society of Physics Students

Hello Everyone! Welcome to the Society of Physics Students (SPS) page! We have a few short demo videos of physics experiments. Accompanying each video will be a short description of the physics behind each experiment. Please see the video below to meet our demo volunteers and enjoy some fun and simple physics experiments!

This first demo shows ping pong balls moving down 4 different types of inclined planes. Inclined planes are just paths that the balls move on when traveling downwards. The shape of the path determines which ball will reach the bottom first.Can you guess which path will be the fastest before we give you the answer? (Answer at 36 seconds!)

This video shows the same inclined plane experiment from above but from a different angle

This next demo shows different colored filters over nebula. As you can see when Becca holds a filter over our picture of the Cat’s Eye Nebula, some of the colors seem to disappear. This is due to certain wavelengths (or colors) being blocked out by that filter. This technique is used by astronomers and astrophysics to determine what elements and other materials are present in very distant objects.

This demo has Clarissa describing the life cycle of a star. The basic idea behind the process is a lot of material (Hydrogen gas) will move closer and closer together by gravity. When the gas is close enough together, nuclear reactions can take place. This nuclear reaction creates a lot of energy. This energy pushes material outwards and makes things very hot. Eventually, gravity and the force from the nuclear reaction will be equal but opposite, and the star will become stable. The star will stay like this for hundreds of thousands of years! Eventually, the star will run out of material to conduct this nuclear reaction on, and the star will collapse. This is how black holes, neutron stars, and several dwarf stars are created.

This video shows how very massive objects in the universe will bend space and time around them! The more massive the object, the more of bend there is on our “fabric” of reality. This demo shows a very massive object, like a black hole, in the center with smaller objects like stars or planets orbiting around them. An important thing to remember is the orbit around these objects typically isn’t that fast and will make several more rotations before falling into the massive object and colliding.

This final demo shows the properties of Bernouill’s Principle. We apply a gust of air using a hair dryer underneath a ping pong ball. The force from the gust of air is strong enough to overcome gravity! This makes the ball float just above the hair dryer. The ball will do a little dance where it bounces up and down. This effect comes from the force of gravity pulling the ball down fighting the force of the gust of air pushing the ball upwards.

This is a short video showing the hairdryer being turned at an angle while the ping pong ball stays floating in the air! You can see the hair dryer is turned very far before the ball falls.

This final video is a thank you for watching from all the SPS members who hoped you had fun and learned something!

If you have any questions or would like to learn more about any of these physics demos or physics in general, feel free to contact the SPS officer team at eaglephysicsstudents@gmail.com

Thank you for stopping by our page and enjoy the rest of Sci-Tech Fest!