According to Kelper's 3rd Law, the square of the time period is proportional to the ________ power of the semi major axis of the ellipse.
2nd
3rd
4th
5th
Three resonant frequencies of a string are 90, 150 and 210 Hz.
(i) Find the highest possible fundamental frequency of vibration of this string
(ii) Which harmonics of the fundamental are the given frequencies?
(iii) Which overtones are these frequencies?