Physics, 20.12.2019 22:31, mackdoolittle1
The physics of wind instruments is based on the concept of standing waves. when the player blows into the mouthpiece, the column of air inside the instrument vibrates, and standing waves are produced. although the acoustics of wind instruments is complicated, a simple description in terms of open and closed tubes can in understanding the physical phenomena related to these instruments. for example, a flute can be described as an open-open pipe because a flutist covers the mouthpiece of the flute only partially. meanwhile, a clarinet can be described as an open-closed pipe because the mouthpiece of the clarinet is almost completely closed by the reed.
a hole is now drilled through the side of the pipe and air is blown again into the pipe through the same opening. the fundamental frequency of the sound wave generated in the pipe is now
(a) higher than before
(b) lower than before
(c) the same as before
Answers: 1
Physics, 22.06.2019 05:50, kamrulh278
Acylinder with a movable piston contains 11.7 moles of a monatomic ideal gas at a pressure of 1.32×10^5 pa. the gas is initially at a temperature of 300 k. an electric heater adds 43200 j of energy into the gas while the piston moves in such a way that the pressure remains constant. cp=20.79 j k^−1 mol^−1 for a monatomic ideal gas, and that the number of gas molecules is equal to avogadro's number (6.022×10^23) times the number of moles of the gas. (a) what is the temperature of the gas after the energy is added? (b) what is the change in volume of the gas? (c) how much work is done by the gas during this process?
Answers: 3
Physics, 22.06.2019 09:00, NatalieAllen11
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Physics, 22.06.2019 16:00, ggdvj9gggsc
Suppose a soccer ball is kicked from the ground at an angle 20.0º above the horizontal at 8.00 m/s. the y-velocity is determined to be 2.74 m/s. how long will the ball be in the air? assume the ball lands at the same height at which it was kicked.
Answers: 2
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