Stationary sound waves can be formed in the air columns of pipes. One type of pipe is closed at one end and open at the other end. Another type of pipe is open at both ends.
Which pipe can form a stationary sound wave with the lowest frequency?
1 )


3 )

4 )

تحلیل ویدئویی تست
تحلیل ویدئویی برای این تست ثبت نشده است!