Question

Wave on a string is best described using the concept of displacement, what concept do we use to describe sound waves? Select one: O a. Pressure O b. Force O c. Velocity O d. Acceleration m A uniform string has a mass of 6.3 mg and a length of 4.55 m as shown in the figure. The string passes over a pulley and supports a 4.21 kg box. Calculate the speed of a wave pulse that would travel along such a string. Answer: A live comedy show by Trevor Noah has a microphone whose power output is at 3.85 W when he speaks. If the microphone's sound disperses in all directions, within what distance from the comedian would the sound be painful? NB: Sound level of pain threshold is 120 dB.

Answer 1

♡ Pressure (2 0-3 xه : س 3ه) یا 38 .| kglm ککرا N Ta mg اهو 3 . ا ا - 8 -9 x 21 ا اه 1.3 ا 6xo3 و 38 ۸ -3 (۵ کہ مي 24.829 V - 14 2,7) ra I ہ12 log 10-12 ( ) وعد (اوم = 12 12 - 1 = 1 W/m² P= I A 2 : که .3 ها (1) 8 : ک8 -3 کی ک.0 m ما