1. A hammer taps on the end of a 4.0-m long metal bar at room temperature. A microphone at the other end of the bar picks up two pulses of sound. one that travels through the metal and one that travels through the air. The pulses are separated in time by 11.0 ms. What is the speed of sound in this metal? [6044 11115] 2. A concert loudspeaker suspended high above the ground emits 35 W of sound power. A small