this is in Bosnian. if you can translate and work pls because i don't know how to translate. no links!!!

What are the theoretical properties of a gas at a temperature of 0 kelvin?

Describe how the motion of a spring being pushed forward and backward is similar to the motion of air particles in a sound wave.

Aheavy boy and a lightweight girl are balanced on a massless seesaw. the boy moves backward, increasing his distance from the pivot point. what happens to the seesaw? it is impossible to predict without knowing additional information. the side the boy is sitting on will tilt downward. the side the girl is sitting on will tilt downward. nothing; the seesaw will remain balanced.