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A spider has a mass of 0.70-g and is hanging from rest on a 20-cm long thread of 0.0020-mm diameter of silk. Spider silk has a density of 1290 kg/m^3.
A) If the small child holding the other end of the silk moves their end of the silk, how long will it take for the spider to feel it?
B) If the string is whirled in a circle at a rate of 2 revolutions per second, what is the minimum and maximum time for vibrational information from one side of the string to reach the other?
Transvers waves: Speed of wave on streatched string. Two steel wires are stretched with the same tension. The first wire has a diameter of 0.610 mm and the second wire has a diameter of 0.910 mm
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A 2.0 kg ball moving with a speed of 3.0 m/s hits, elastically, an identical stationary ball as shown. If the first ball moves away with angle 30° to the original path
A support strap is attached to the patient's ankle 13.0 from the bottom of his foot. Illustrate what weight is needed to support the leg horizontally?
An insulating rod of length 14.0 cm is bent into the shape of a semicircle and has a uniform total charge of -7.5 uC, Calculate the magnitude and direction of the electric field at the center of the semicircle arc
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How much time take for the package to reach the ground.
Sketch the shear force and bending moment diagram and Verify that the support reactions are correct.
A small piece of dust of mass m = 1.50g travels horizontally through an electric air cleaner in which the electric field is 498N/C. The electric force on the particle is equal to weight of the particle.
A 3000 flask is initially open while in a room containing air at 1 and 20 . The flask is then closed and immersed in a bath of boiling water. When the air in the flask has reached thermodynamic equilibrium, flask is opened and air is allowed to esc..
A ball is thrown straight upward and reaches the top of its path in 1.71 s (before it starts to come back down). A second ball is thrown at an angle of 38.2 degrees with the horizontal. At what speed must the second ball be thrown so that it rea..
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