For a science experiment, you would like to use the Doppler effect to double the perceived frequency of a harmonica, from the 261.7-Hz tone (middle C) that it emits, to 493.9 Hz (B4 note).Calculate the speed the harmonica must have in order for a stationary observer to hear 493.9 Hz.
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Physics, 22.06.2019 19:00
The built in flash in a compact camera is usally capable of giving correct exsposure for distance up to how many meters?
Answers: 1
Physics, 22.06.2019 22:30
Materials will have different energies associated with the electrons inside them. this is related to how strongly bound they are by their work function. if we sandwich a material with a very low energy between two materials with a high energy, we create a trap for an electron. if this trap is very narrow in one direction in comparison to the others, this is approximately a 1-dimensional box that confines the electron. what is the lowest energy of an electron in the box if the thinnest direction across the materials is 4.81 nm?
Answers: 3
Physics, 23.06.2019 00:00
You are standing on a boat. which of the following strategies will make the boat start moving? a. pushing the mast b. throwing some cargo out of the boat c. pushing the front ofthe boat d. pushing another passenger
Answers: 3
For a science experiment, you would like to use the Doppler effect to double the perceived frequency...
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