The E-string on a violin produces a frequency of 660 Hz, and the wavelength of the standing wave on the string is 650 mm, a) Estimate the speed of the travelling wave on the violin

b) If that E-string has a tension of 82.3 N, what is the density of the metal that the string is made of? Assume that the string is perfectly circular, with a radius of 0.27 mm. Density is defined as p = m/V, and the volume of a cyliner is V = πr²L.

Gam radio signals can usually be heard behind a hill, but fm often cannot. that is, am signals bend more than fm. explain. (radio signals, as we shall see, are carried by electromagnetic waves whose wavelength for am is typically 200 to 600 m and for fm about 3 m.)

An engineer designs a roller coaster so that a car travels horizontally for 152 ft, then climbs 137 ft at an angle of 34.0° above the horizontal. it then moves 137 ft at an angle of 48.0° below the horizontal. if we take the initial horizontal motion of the car to be along the +x-axis, what is the car's displacement? (give the magnitude of your answer, in ft, to at least four significant figures and give the direction of your answer in degrees counterclockwise from the +x-axis.)

The slope of a velocity time graph over any interval of time gives the during that interval