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The most soaring vocal melody is in Johann Sebastian Bach's Mass in B Minor. In one section, the basses, tenors, altos, and sopranos carry the melody from a low D to a high A. In concert pitch, these notes are now assigned frequencies of 146.6 Hz and 880.0 Hz. FInd the wavelengths of a) the initial note and b) the final note. Assume the chorus sings the melody with a uniform sound level of 75 dB. Find the pressure amplitudes of c) the initial note and d) the final note. Find the displacement amplitudes of the a) initial note and b) the final note. part c and d should be in pascals.
Explain the sign of the acceleration and describe in words how the thread changes the velocity of the spider. would also like to know how to get to the answer can any one explain this to me in english?
A high-speed photograph of a club hitting a golf ball, find the average force exerted on the ball by the club
A 0.43m long wire is located entirely inside a uniform magnetic field B = 0.31T. The wire is perpendicular to the direction of the magnetic field. Calculate the size of the current
A 65.0 kg bungee jumper steps off abridge with a light bungee cord tied to her and to the bridge. The unstretched length of the cord is 11.0m. She reaches the bottom of her motion 36.0 m below the bridge before bouncing back
An air conditioning unit keeps a house cool at 68 degrees Fahrenheit when the outsid temperature is 95 degrees Fahrenheit. how much does it exhaust to the outside
A sinusoidal wave traveling in the positive x-direction has a wavelength of 11 cm, a frequency of 13 Hz, and an amplitude of 19 cm. The part of the wave that is at the origin at t = 0 has a vertical displacement of 6 cm. For this wave, determine the ..
the magnetic flux that passes through one turn of a12-turn coil of wire changes to 3.5wb from 12.0 wb in a time
If the mass is suspended by a spring M = 200g, What is the value of the spring constant of the spring
The moon orbits the earth at a distance of 3.85 x 108 m. Assume that this distance is between the centers of the earth, Find the period for the moon's motion around the earth
An electron in a cathode-ray tube is emitted from a hot filament at a negligible speed. , whereupon it accelerates across a potential difference of 1.00 x 106 V. Determine its final speed compared to the classical result.
A 37-kg block of ice at 0° C is sliding on a horizontal surface. The initial speed of the ice is 6.2 m/s, Determine the mass of ice that melts into wate
You are standing at a red light on SW 8th Street at 97th Avenue. The light turns green, find the work done on your car by the frictional force
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