Questions in waves

Select	Question
	The stationary wave $y=2a\sin kx\cos \omega \,t$ in a closed organ pipe is the result of the superposition of $y=a\sin (\omega \,t-kx)$and
	Stationary waves are set up in air column. Velocity of sound in air is 330 m/s and frequency is 165 Hz. Then distance between the nodes is
	An open pipe of length l vibrates in fundamental mode. The pressure variation is maximum at
	Fundamental frequency of pipe is 100 Hz and other two frequencies are 300 Hz and 500 Hz then
	Fundamental frequency of an open pipe of length 0.5 m is equal to the frequency of the first overtone of a closed pipe of length $l$. The value of $l_c$ is (m)
	In a closed organ pipe the frequency of fundamental note is 50 Hz. The note of which of the following frequencies will not be emitted by it
	On producing the waves of frequency 1000 Hz in a Kundt's tube, the total distance between 6 successive nodes is 85 cm. Speed of sound in the gas filled in the tube is
	What is the base frequency if a pipe gives notes of frequencies 425, 255 and 595 and decide whether it is closed at one end or open at both ends
	A student determines the velocity of sound with the help of a closed organ pipe. If the observed length for fundamental frequency is 24.7 m, the length for third harmonic will be
	An open pipe of length 33 cm resonates with frequency of 100 Hz. If the speed of sound is 330 m/s, then this frequency is