Thursday
September 18, 2014

Posts by ECU


Total # Posts: 8

physics
Suppose that a 1.00 cm3 box in the shape of a cube is perfectly evacuated, except for a single particle of mass 1.13 x 10^-3 g. The particle is initially moving perpendicular to one of the walls of the box at a speed of 525 m/s. Assume that the collisions of the particle with ...
April 15, 2011

physics
A driver measures her "cold" tire gauge pressure to be 1.95 105 Pa. The measurement is made before driving, when the tires are at the temperature of the surroundings, 21.7° C. After driving several miles, she checks the gauge pressure again and finds that it has ...
April 15, 2011

physics
Find the rms speed of H2O molecules in atmospheric water vapor at a temperature of 13.2° C.
April 15, 2011

Physics
Two upward wave pulses are generated at opposite ends of a string and travel toward each other. One has an amplitude of 4.85 cm and the other has an amplitude of 3.27 cm. What is the maximum displacement of any particle of the string?
April 13, 2011

Physics
Waves of all wavelengths travel at the same speed v on a given string. Traveling wave velocity and wavelength are related by v=lambda*f,where v is the wave speed, lambda is the wavelength (in meters), and f is the frequency [in hertz]. Since only certain wavelengths fit ...
April 13, 2011

Physics
The guitar is a musical instrument of the chordophone family, being a stringed instrument played by plucking. The tone of an acoustic guitar is produced by the vibration of the strings. Guitar spring (made out of steel) has length L = 0.6 m. The elastic limit for the tension (...
April 13, 2011

Physics
The top string of a guitar has a fundamental frequency of 300 Hz when it is allowed to vibrate as a whole, along all its 60.0 cm length from the neck to the bridge. A fret is provided for limiting vibration to just the lower two-thirds of the string. The guitarist can play a &...
April 13, 2011

Physics
You want to make an open-ended flute, open at both ends, with fundamental frequency (lowest pitch sound it produces) of 680 Hz. Assume speed of sound in air is 340 m/s. a) What should the length of the flute be?
April 13, 2011

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