Sound waves move in air at a speed of 340 m/s. You play a piano note with a frequency of 220 Hz. The sound moves through the air first, then eventually travels through your floor. a. What is the wavelength of the wave in air? Show your work. b. In your floor, the wave moves at a speed of 2000 m/s. What is the frequency and wavelength of the wave in the floor? Explain your steps show your work.

A 245 centimeter long string is clamped at both ends and has a mass of 7.00 grams. The tension in the string is 125 N. a) what is the speed of a wave on this string? The string is plucked so that it oscillates and forms a standing wave with three antinodes. b) draw a sketch of the resulting standing wave. c) Determine the wavelength and frequency of the standing wave. please show work for a,b, and c.  thank you

A.) How many waves are pictured? Remember that 2 lobes = 1 wave. B.) State the amplitude of the waves. C.) Determine how long one wave is.

An airplane approaches at an altitude of 10 km flying at 600 km/hr. a. Jet engines typically emit sound over a wide spectrum of frequencies, with the maximum sound energy at 200 Hz. From this emitted sound, what frequency do you hear initially when it is 1 minute away, and what frequency do you hear 1 minute after it has passed by? b.  What would you  hear, and when would you hear it, if the plane were "hypersonic", traveling three times  the speed of sound, or "Mach 3"?  That's approximately the fastest  military aircraft in routine service today. To have higher speeds in air takes considerably more energy.  For example, after two and half minutes of flight,  when the first-stage main engines of the Space X Falcon shut down,  it is 80 kilometers high and moving at Mach 10 on its way to Earth orbit. The Mach number depends on the temperature of the air.