In which type of wave does the medium move parallel to the direction of the energy transport?

Like a key in a lock, the shape of the. must bind with the. of the recieving neuron

The magnitude of the poynting vector of a planar electromagnetic wave has an average value of 0.939 w/m^2 . the wave is incident upon a rectangular area, 1.5 m by 2.0 m, at right angles. how much total electromagnetic energy falls on the area during 1.0 minute?

What happens when a rubber rod is rubbed with a piece of fur?