Question

iswaran usually read popular thrillers in language​

Answer 1

Explanation:

અરે you in 9th std I think so because this question is in supplementary reader of class 9

Answer 2

Answer:

complete cycle of vibration occurs when the object moves from one extreme position to the other extreme, and back again. The number of cycles that a vibrating object completes in one second is called frequency. The unit of frequency is hertz (Hz). One hertz equals one cycle per second.