What is the wavelength of a 250 hz pure tone

Wavelength = (speed) / (frequency)

So you see, the wavelength is also going to depend on the wave's speed, which you didn't tell us.

-- If the wave is traveling in iron, its speed is about 5,120 m/s.

Wavelength in iron = (5,120 m/s / 250 Hz)

Wavelength in iron =  20.48 meters

-- If the wave is traveling in water, its speed is about 1,480 m/s .

Wavelength in water = (1,480 m/s / 250 Hz)

Wavelength in water =  5.92 meters

-- If the wave is traveling in air, its speed is about 340 m/s .

Wavelength in air = (340 m/s / 250 Hz)

Wavelength in air =  1.36 meters

.) the observation by semmelweis that more mothers died of childbed fever when their doctors also worked in the morgue

the moon affects the earth gravitation ally, causing certain motions of that body and also producing tides in its ocean and atmosphere. the tidal wave in our atmosphere is, however, far too minute to be an effective cause in any known meteorological phenomenon.

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