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A 200 lbm bungee jumper jumps from a bridge 130 ft above a river. The bungee cord has an unstretched length of 60 ft and has a spring constant of k = 14 lbf/ft. USING KINETICS ONLY, determine how far above the river the jumper is when the cord brings him to a stop. Is acceleration constant throughout the jump? Also, recall from earlier that you must integrate if acceleration is a function of position. What maximum force does the cord exert on him?
You have a 1200W microwave. When you put a cup of water in for 8 minutes only half evaporates. How eficient is your microwave
A 11.7 cm radius thin ring carries a uniformly distributed 15.4μc charge. A small 8.6g sphere with a charge of 1.5μc isplaced exactly at the center of the ring and given a very smallpush so it moves along the ring axis (+x axis)
A radar receiver can be tuned to detect signals in the range of [1750 µm to 2750 µm]. What is the frequency difference between the minimum and maximum wavelength
Two parallel, uniformly charged, infinitely long wires carry opposite charges with a linear charge density ? = 2.15 ?C/m and are 6.69 cm apart. What is the magnitude of the electric field at a point midway between them and 54.3 cm above the plane ..
A jet airliner moving initially at 300 mi/h due east enters a region where the wind is blowing at120mi/h in a direction35.5°north of east. find the new velocity of the aircraft relative to the ground
A variable-speed drill, initially turning at 300 rpm, speeds up to 1300 rpm in a time interval of 0.3 s
Two identical point charges are fixed to diagonally opposite corners of a square that is 0.455 m on a side. Each charge is +2.70 10-6 C. How much work is done by the electric force as one of the charges moves to an empty corner?
A car travels at a speed of 29 m/s around a curve of radius 67 m. What is the net centripetal force required to keep the car from skidding sideway.
Starting from rest, a 98-kg firefighter slides down a fire pole. The average frictional force exerted on him by the pole has a magnitude of 825 N, How far did he slide down the pole
An RLC circuit with R = 28.7 ohms, = 348 mH, and = 41.4 microfarads is connected to an ac generator with an rms voltage of 27 V. Determine the average power delivered to this circuit when the frequency of the generator is half the resonance frequency
A positive charge q1 = 2.50 µC on a frictionless horizontal surface is attached to a spring of force constant k, the distance between charges to d = 9.00 cm, Find the value of k
A solid cube of iron (density = 7.87 g/cm3) has a mass of 88.0 g. What is the resistance between opposite faces of the cube
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