Atuning fork with frequency 440 hz is held just above the top of a uniform tube containing water. the tuning fork can excite sound waves in the air above the water and in the tube. the water level can be changed by a spigot at the bottom of the tube. as the water drains out, standing waves are excited when the air column has a length of 0.600 m and again at 1.00 m. use this data to calculate the speed of sound in the air column above the water.