The largest resultant amplitude would be that created by constructive interference, basically when the two waves are of the same phase, so it would be 0.36m+0.22m= 0.58 m.
It would be static friction which is what you have to overcome when an object is not in motion. When you move an object friction works against it like gravity and air resistance. I hope this helps!
Wavelength*frequency=velocity
(331m/s)/(.6m)
Frequency = 551.666 1/s
Most winter days or months usually have high humidity levels. As for summer, it will have a lower humidity, holding more moisture than winter air.
I hope I helped :)
