Why do you hear sound when you clap your hands?

When you move your hands, you have kinetic energy. Once your hands collide, that energy has to go somewhere. It turns into heat and sound waves that creates ripples which disturbs the air particle. This is how sound works, a disturbance in air particles.

It maybe because uranus is made of gas but uranus has a solid core in the middle

Imma say go with a (: