Sound Waves

Does sound follow the same laws of reflection as light does?

Flash and thunder are produced simultaneously. But thunder is heard a few seconds after the flash is seen. Why?

What are the parameters that describe a sound wave?

A stone dropped from the top of a tower $300 \mathrm{m}$ high splashes into the water of a pond near the base of the tower. When is the splash heard at the top? Given speed of sound in air=$340 \mathrm{m}/\mathrm{s}$ and $g=9.8 \mathrm{m}/{\mathrm{s}}^2$.

 Define sound.