14. Suppose you are listening to the sound of an organ pipe that is closed at one end. The pipe is 3 m long.
a) What is the wavelength of the sound in the pipe?
b) The speed of sound in air is about 340 m/s. What is the frequency of the sound wave?
c) Now suppose you are listening to the sound of an organ pipe that is open at both ends. As
before, the pipe is 3 m long. What is the wavelength of the sound in the pipe?
d) What is the frequency of the sound wave?

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explanation:

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myth. it was once thought that animals, including cats and dogs, could only see in black and white. however, scientists have proven this to be a myth. in all animals, including humans, the perception of colour is determined by the presence of cells in the eye called cone photoreceptors.

earth's neighboring galaxy, the andromeda galaxy, is a distance of 2.54×107 light-years from earth. if the lifetime of a human is taken to be 70.0 years, a spaceship would need to achieve some minimum speed min to deliver a living human being to this galaxy.