How is light energy different from both sound and heat energy?

In what direction does the medium move relative to the direction of the wave? explain.

Which boundary is associated with the building of the himalaya mountains? convergent transform divergent hot spot

Oxygen undergoes an isentropic expansion from 120 degree c and 280 kpa absolute to 140 kpa absolute. determine the final temperature of the oxygen and the amount of work per kg of o_2 produced in the process if it is adiabatic.