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?

Determine the amount of work done when a crane lifts a 100-n block form 2m above the ground to 6m above the ground

Alinearly polarized electromagnetic wave has an average intensity of 196 w/m^2. this wave is directed towards two ideal polarizers (in real polarizers, transmission is also effected by reflection and absorption). polarizer a is oriented with its transmission axis at an angle of θ_1=20.8∘ with the incident electric field. polarizer b has its axis at an angle of θ_2=63.0∘ with the incident electric field. what is the average intensity of the wave after it passes through polarizer a? what is the average intensity of the wave after it passes through polarizer b? suppose that the two polarizers a and b are interchanged. what would the average intensity be after passing through both polarizers?

The two required components for a generator