Question

Why do you think the combined wave is more powerful than either the transverse or longitudinal wave with the same amplitude, frequency, tension, and density?

Answer 1

when two waves superimposed then the resultant wave will have more energy and more intensity

It is because the resultant amplitude will be increased and given by the following equation

$R = \sqrt{A_1^2 + A_2^2 + 2A_1A_2cos\theta}$

so here due to superposition since amplitude is increased so the energy or power of the wave will be increased

There is no effect on frequency , tension and density after superposition of waves and it will remain the same

SO energy is given as

$E = kA^2$

here k = constant

A = amplitude