Silly Putty is a famous toy around the world but little is known that is a non Newtonian fluid accidently created by James Wright in 1943. He dropped boric acid into silicon oil creating polymer later called silly putty. It was thought to be a replacement of rubber but it stretched way too much and [...]
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melissalozada
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Beer Bubbles
After pouring a beer they are bubbles streaming up from the bottom, what causes this? First of all bubbles are globules of one substance in another usually gas in a liquid. Well beer bubbles are compared to raindrops both being tiny and that clusters Both on rough spots called “nucleation sites” – dust particles in [...]
Physics of Ball Spin in Tennis
Have you ever seen tennis players do some impossible shots and wondered how it was possible? Well the shots mentioned are the top spins and the back spin. They are made by hitting a yellow tennis ball of 6.7 cm, it can achieve a velocity of 150 miles per hour at a serve. The tennis [...]
Physics of Surfing
A surfer begins by floating with his surfboard just waiting for the correct wave to ride. While he waits they are two important forces at work: gravity and buoyancy. The gravity pulls the surfboard and the rider downwards as a center of mass located behind their navel in the middle of their bodies. Buoyancy is [...]
