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Q1. A coiled telephone cord forms a spiral with 56 turns, a diameter of 1.30 cm, and an unstretched length of 60.0 cm. Determine the self-inductance of one conductor in the unstretched cord.
Q2. At a construction site, a 67.0 kg bucket of concrete hangs from a light (but strong) cable that passes over a light friction-free pulley and is connected to an 85.0 kg box on a horizontal roof. The cable pulls horizontally on the box, and a 50.0 kg bag of gravel rests on top of the box. The coefficients of friction between the box and roof are shown (µs=0.700, µk=0.400). The system is not moving. Find out the friction force on the bag of gravel. Find the Friction force on the box.
A particle of rest mass m0 moving with a speed of 0:8c collides and sticks to a particle of rest mass 3m0 that is initially at rest. What is the kinetic energy of the initial moving particle
A certain type of laser emits light that has a frequency of 5.6 x 10^14 Hz. The light, however, occurs as a series of short pulses, each lasting for a time of 3.9 x 10-11 s.
A 0.2kg aluminum plate, initially at 20C, slides down at a 15.00 m long surface, incline at a 30 degree angle to the horizontal. The force of kinetic friction exactly balances the component of gravity down the plane so that the plane.
Bob, of mass m, drops from a tree limb at the same time that Esther, also of mass m, begins her descent down a frictionless slide. If they both start at the same height above the ground, which is true about their kinetic energies as they reach the gr..
A box of unknown mass begins at the base of a 30 degree ramp with an initial velocity of 10.0 m/s. calculate the maximum distance up the ramp which the box will reach
A 5 kg block, measuring 10 cm per side, is held 50% submerged in water by a Helium balloon. If the density of Air is 1.18g/L, what is the diameter of the balloon
Train car 1 has a mass of 6.5 x 10^4 kg and is sitting stationary on a track. Train car 2, with a mass of 9.30 x 10^3 kg, What is the speed of Train car 1 after the collision
a thin, uniform bar of length D = 1.28 m and mass M = 0.67 kg pivoted at the top. find the speed of the particle before impact
Consider a cell phone that emits electromagnetic radiation with a frequency of 1.0 GHz and with a power of 70 W. What is the electric field amplitude at a distance 1020 m away from the phone
A 1.2 kg toy car traveling at 2.0 m/s to the right collides and sticks to a 2.0 kg toy car traveling at 1.6 m/s to the left. What fraction of the total initial kinetic energy was lost in the collision
A discus thrower changes his angular velocity from 280°/s to 400°/s (at the time of release) in 1.5 sec. find the average angular and linear acceleration
A balsa-wood raft has the following dimensions: L=2.34m , W= 1.35m , H= 0.65m. if the mass of an average person is 72.5kg, how many people can the raft safely support
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