The __ is responsible for determining the frequency of vibration of the air column in the pool with in a wind instrumen . a. type of reed use . b. effective length of the tube. c humidity of the air

Answer;

B. Effective length of the tube.

Explanation;Most wind instruments are of either the open-open tube or the open closed tube type. Open ends of the tubes makes contact with the outside, atmospheric air.At an open end, when the air is disturbed in the wind instruments, the air vibrates with a variety of frequencies, however the frequencies that correspond to the natural frequencies will persist.Effective Length of the tube is responsible for determining the frequency of vibration of the air column in the pool with in a wind instrument.

Alkaline earth metals are found in group 2 of the periodic table.

Ithink the answer is d