In which state of matter do the particles have the most energy?
plasma
solid
liquid
gas

Aplane flies directly between two cities, a and b, which are separated by . from a to b, the plane flies into a headwind. on the return trip from b to a, the wind velocity is unchanged. the trip from b to a takes less than the trip from a to b. what is the airspeed of the plane, assuming it is the same in both directions

What is the earliest point in the universe that we can observe? why can’t we see back further than this?

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