Answer the 2nd question as soon as possible....

Answer the 2nd question as soon as possible.... Mention two effects produced on humans by sounds Ot 90 dB or more. G. Answer the following in detail. Define amplitude, time period and frequency with respect to a sound way@State the relationship between time period and frequency of a wave. 2- State the factors affecting the loudness of sound. HOW do these factors affect the loudness Of sound? q What do you understand by the terms pitch, timbre and loudness Of a sound? How can you prove experimentally that the pitch of a string instrument depends on the the vibrating string? Prove that the pitch of a wind instrument depends on the length of the vibrating air column. 6. Classify percussion instruments on the basis Of the pitch produced by them. 7. Differentiate between music and noise. W'hy is it advisable to listen to music at a moderate level?