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Why the Highest Piano Notes Have Short StringsThe steel used for piano wire has a breaking (tensile) strength Pr of about 3*109N/m2 and a density ρ of 7800kg/m3.
1. What is the speed v of a wave traveling down such a wire if the wire is stretched to its breaking point? Express the speed of the wave numerically, in meters per second, to the nearest integer.
2. Imagine that the wire described in the problem introduction is used for the highest C on a piano (C8= 4000Hz ). If the wire is in tune when stretched to its breaking point, what must the vibrating length of the wire be? Express the length numerically, in centimeters, using three significant figures.
A roller coaster at the Six Flags Great America amusement parkin Gurnee, Illinois, incorporates some clever design technology andsome basic physics. What is the radius of the arc of the tear drop at the top
A small piston with area A1 = 45 cm^2 acts in a cylinder to lift a larger piston A2 = 550 cm^2 Find the force on the small piston (F1) if the pressure in the system is 7000 pascals.
A skier with a mass of 63 kg starts from rest and skis down an icy slope that has a length of 50 m at an angle of 32 degrees with respect to the horizontal. Iillustrate what is the speed of the skier at the bottom of the slope?
Two particles having equal signed charges of 12nc are placedat two of the vertices of an equilateral triangle, What is the magnitude of the electrical field at the third vertex of the triangle
Suppose that a 1 kg standard body accelerates at 4.00 m/s^2 at 160 degrees from the positive direction of the x-axis, owing to two forces, What is the magnitude and direction of the second force
a particular air conditioner can remove heat from a room at a rate of 150 w. heat is also added to the room through
You pull downward with a force of 28 N on a rope that passes over adisk-shaped pulley of mass 1.2 kg and radius 0.075 m. Find the tension in the rope on both sides of the pulley
A 0.810 kg particle has a speed of 2.60 m/s at point A and kinetic energy of 8.80 J at B. What is its speed at B? reply in units of m/s.
A 5.0 kg bundle starts up a 30° incline with 128 J of kinetic energy. How far will it slide up the plane if the coefficient of friction is 0.40
If the speed of a car is increased by 65%, by what factor will its minimum braking distance be increased, assuming all else is the same
A proton (m = 1.7 × 10–27 kg, q = +1.6 ×10–19 C) starts from rest at point A and has a speed of 40km/s at point B. Only electric forces act on it through this motion. Decide the electric potential difference.
A heat engine operates between a reservoir at 28°C and one at 354°C. What is the maximum efficiency possible for this engine
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