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A steel piano string is 47.9 inches long. The diameter of the string 0.0421 inches. When struck, this string produces the musical note, B, which has the pitch of 123 Hz. (a) Find the tension of this string. Give the answer in pounds. The density of steel is 7.86 g/cm^3. (b) There are 228 strings in a piano. (Some notes use more than one string.) If we assume that the tension in every string is the same, find the total fouce (in tons, 1 ton=2000 lb) exerted on the frame of the piano. (Add together the tensions of all the strings.) Piano frames are made of steel so that they can withstand this kind of force.
a proton and an alpha particle which has twice the charge and four times the mass of the proton are each accelerated
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There are two stable states of CaCO3 known as Aragonite and Calcite. Using information from the table reference data at the back of the book.
A cat rides a merry-go-round while turning with uniform circular motion. At time t1 = 2.00 s, the cat's velocity is v1 = (5.50) i + (4.00 m/s) j, What is the magnitude of the cat's centripetal acceleration
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two ships a and b leave port at the same time. ship a travels northwest at 20 knots and ship b travels at 28 knots in a
Estimate how many times planet has orbited its star
The blades of a kitchen blender rotate counterclockwise at 2.2×104 rpm (revolutions per minute) at top speed. find the average angular acceleration of the blades
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A soccer player kicks the ball toward a goal that is 27.0 m in front of him. Find the speed of the ball when the goalie catches it in front of the net
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