<span>The vertical axis represents the velocity of the object</span>
A sound wave is a wave of compression and rarefaction, by which sound is propagated in an elastic medium such as air.
Long time ago, people saw the constellations as patterns in the sky. They names these patterns and tell stories about them. What people saw laong time ago are just mere patterns which forms animals and shapes. We got the names of our constellations from the Greeks who named the constellations after the mythological heroes and mythological legends.
Solid at room temperature
It would be: Activation Energy = 300 KJ
Hope this helps!