4. [/2 Points] DETAILS OBINPHYS8 6.Q.030. MY NOTES ASK YOUR TEACHER | PRACTICE ANOTI- An audio speaker producing a steady sound at an outdoor concert is 22 ft away from you. If you move to a position where the speaker is 68 ft distant, by what factor will the amplitude of the sound change? Need Help? 5. [-/2 Points] DETAILS OBINPHYS8 6.P.001. MY NOTES ASK YOUR TEACHER | PRACTICE ANOTI- Two children stretch a jump rope between them and send wave pulses back and forth on it. The rope is 3.1 m long, its mass is 0.68 kg, and the force exerted on it by the children is 47 N. (a) What is the linear mass density of the rope (in kg/m)? :l kg/m (b) What is the speed of the waves on the rope (in m/s)