15-1, a point charge of +Q is placed at the centroid of an equilateral triangle. As seen in the MakeCode Play tone at line, 262 Hertz is a Middle C, while 131 Hertz is a. What is the separation between these two.Ģ6) As shown in Fig. With a piano, you have a key for every note you want to play. (a)What is the magnitude of the force on the electron?ġ6) The force of attraction between a - 40.0 μC and + 108 μC charge is 4.00 N. What is the.ġ0) A proton and electron are separated by 3.5 nm. The Corresponding Wavelength In Air Is Most Nearly (A) 7.7 Cm. Middle C On The Piano Keyboard Has A Fundamental Frequency Of 262 Hz. If the charges on both objects are doubled with no change in separation, the.Ģ8) An electric dipole placed into a non-uniform electric field feels a net forceġ) There is a 5.0 μC charge at each of 3 corners of a square (each side 70. The Speed Of Sound In Room-Temperature Air Is About 340 M/S. What is the fundamental frequency?Ģ) State the principle of conservation of charge.ĩ) The Coulomb force between two charges can be attractive or repulsive.ġ8) Two charged objects attract each other with a certain force. Which one of the following frequencies will not resonate in the same pipe?Ĥ4) A closed organ pipe of length 0.750 m is played when the speed of sound in air is 340. What is the frequency of the lowest tone that will resonate in a closed pipe of length 2L?Ĥ3) The lowest tone to resonate in an open pipe of length L is 200 Hz. Which of the following frequencies will not resonate in that pipe?Ĥ2) The lowest tone to resonate in an open pipe of length L is 400. Hz) at 20.☌, a saxophone must create how long an effective air column?Ĥ1) The lowest tone to resonate in a closed pipe of length L is 200 Hz. What is the frequency of C an octave higher?Ĥ0) To produce an "A" note (440. What is the half-angle of the conical shock wave formed?ģ9) Middle C has a frequency of 262. What is the Mach number of the aircraft?ģ8) A jet flies at a speed of Mach 1.3. What is the frequency of the sound emitted by the horn? The speed of sound in air is 343 m/s.ģ7) The half angle of the conical shock wave produced by a supersonic aircraft is 60°. To find the second harmonic, you take the fundamental frequency and multiply by two. What is the frequency of the second harmonic of this note 262 x 2 524 Hz. After the car goes by, you hear a frequency of 65 Hz. The note middle C on a piano has a fundamental frequency of about 262 Hz. The observer hears a frequency ofģ6) A car approaches you at a constant speed, sounding its horn, and you hear a frequency of 76 Hz. The observer hears a frequency ofģ5) An observer approaches a stationary 1000 Hz sound source at twice the speed of sound. What frequency is perceived by the occupant of a car traveling towards the factory at 30 m/s? The speed of sound in air is 343 m/s.ģ4) A sound source (normal frequency of 1000 Hz) approaches a stationary observer at one-half the speed of sound. The What If? below explores a variation in length.33) A factory siren indicating the end of a shift has a frequency of 80 Hz. In reality, the frequencies of piano strings vary due to additional parameters, including the mass per unit length and the length of the string. Such large tensions would make it difficult to design a frame to support the strings. Knowing that the fundamental frequency is f_=2.82įinalize If the frequencies of piano strings were determined solely by tension, this result suggests that the ratio of tensions from the lowest string to the highest string on the piano would be enormous. Conceptualize Remember that the harmonics of a vibrating string have frequencies that are related by integer multiples of the fundamental.Ĭategorize This first part of the example is a simple substitution problem.
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