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An aluminium wire, of length l1 = 60.0 cm, cross-sectional area 1.00 x 10^-2 cm^2, and density 2.60 g/cm^3, is joined to a steel wire, of density 7.80 g/cm^3 and the same cross-sectional area. The compound wire, loaded with a block of mass in = 10.0 kg, is arranged as shown so that the distance ?2 from the joint to the supporting pulley is 86.6 cm. Transverse waves are set up in the wire by using an external source of variable frequency not shown in the picture: a node is located at the pulley. 1) Discover the lowest frequency of excitation for which standing waves are observed such that the joint in the wire is a node. 2) How many nodes are observed at this frequency?
Suppose that a 1.00 cm3 box in the shape of a cube is perfectly evacuated, except for a single particle of mass 1.23 10-3 g. Find the average pressure on the other walls
measuring the speed of light michelson in 1926 albert michelson measured the speed of light with a technique similar to
Tarzan, whose mass is 95.0 kilogram, swings from a 3.40 meter vine that is horizontal when he starts. Find the height of the highest tree limb they can reach on their upward swing
Light enters a substance from air at 30 degrees to the normal. It continues through the substance at 23 degrees to the normal. What would be the critical angle for this substance
A particle with a mass of 3.5 × 10-20 kg is oscillating with simple harmonic motion with a period of 1.9 × 10-5 s and a maximum speed of 3.9 × 103 m/s. estimate the maximum displacement of the particle
A defibrillator consists of a 16.7-µF capacitor that is charged to 9.0 kV. how much charge passes through the body tissues
a solid sphere with radius 0.050m and a mass of 3.0kg has a rod through its center. a net torque of 6.010-4 nm is used
A block of mass m = 3.07 kg is attached to a spring (k = 29.3 N/m) by a rope that hangs over a pulley of mass M = 6.14 kg and radius R = 8.81 cm. find the maximum extension of the spring
A 32 kg child sits at one end of a3.4 m long seesaw. Where should her 65 kg father sit so the center of mass will be at the center of theseesaw?
What average force did the block exert on the bullet if it took 0.07 s to stop the bullet?
A capacitor consists of two closely spaced metal conductors of large area, separated by a thin insulating foil. Calculate the amount of energy stored in the capacitor
find the transformation matrix r that describes a rotation of 90 degrees about an axis from the origin through the
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