rank the following waves from highest to lowest energy.\nwave 1 wave 2 wave 3\n2,1,3 3,2,1\n1,2,3 2,3,1

Explanation:

Step1: Recall energy - frequency relation

The energy of a wave is directly proportional to its frequency ($E = hf$, where $E$ is energy, $h$ is Planck's constant, and $f$ is frequency). Higher frequency means higher energy.

Step2: Analyze the waves

Wave 2 has the most number of cycles in a given time - interval, so it has the highest frequency. Wave 1 has a moderate number of cycles, and Wave 3 has the least number of cycles in the given time - interval. So the order of frequencies from highest to lowest is Wave 2, Wave 1, Wave 3.

Step3: Determine energy order

Since energy is proportional to frequency, the order of energies from highest to lowest is Wave 2, Wave 1, Wave 3.

Answer:

2,1,3