1. A source with a period of 0.10 s is used to make waves in a string that is 4.0 m long. The source creates a standing wave in the string, with five complete loops. Find the speed of the waves and the time it takes for the waves to move from one end of the uring to the other. (5 murks) A 630 He tuning fork is held near the top of a closed air column, which is filled to the top with water. As the water level is slowly lowered, resonance is heard several times, The temperature in the room is 27"C. Find the first two resonant lengths in the air column