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Physics Facts

The Weakest Force

Did you know that gravity is the weakest force in the universe? Well, it's true! There are four fundamental forces (that we know of) in our universe: Strong Nuclear, Electromagnetic, Weak Nuclear ... Continue reading

Gravity Is the Weakest!

The Physics of Sandcastles

Give a plastic bucket and a shovel to a child, then turn her loose on a beach full of sand. She'll happily toil the day away building the sandcastle to end all sandcastles. It's pure fun. It's also ... Continue reading

So much going on in a grain of sand.

Can You Miss the Earth?

Have you ever wondered why astronauts float in space? Well, it isn't because there is no gravity in space. Astronauts float because they are in constant free fall. If a baseball pitcher throws a ... Continue reading

Astronaut in free fall

Kinetic Theory of Gases

Air is a gas, and gases can be studied by considering the small scale action of individual molecules or by considering the large scale action of the gas as a whole. We can directly measure, or sense, ... Continue reading