A pipe open at both ends has a fundamental frequency of 235 Hz when the length of the pipe is0.758 m. What must the speed of sound in air be for this to occur?

A neon laser of wavelength 540 nm is pointed at a diffraction grating of 3300 lines/cm. Find the angle where the first bright spot occurs in a double slit diffraction experiment.

Which of the following statements is true about electromagnetic waves produced by oscillating charges versus sound waves produced by oscillating tuning forks?

	A.	Both are longitudinal waves.
	B.	Sound waves require a matter medium;EM waves do not require a matter medium.
	C.	Both are transverse waves.
	D.	Both are mechanical waves.