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A certain atom of has 73 protons. Assume that the nucleus is a sphere with radius 6.54 fm and with the charge of the protons uniformly spread through the sphere. At the nucleus surface what is the magnitude of the electric field produced by the protons?
A 120 kg scaffold is 6.6 meters long. It is hanging with two wires, one from each end. A 540 kg box sits 1 meter from the left end. What is the tension in the right hand side wire
A coin placed on a turntable rotating at 36.1 rev/min will stay there if its center is placed no further than 7.1cm from the axis of rotation. find the maximun distance the center of the coin can be placed
A When the magnetic flux through a single loop of wire increases by 30 Webers, a current of 40.0 A is induced in the wire. over what time did the flux change
Treating a lightning bolt as a long, thin wire, calculate the magnitude of the magnetic field produced by such a bolt of lightning at a distance of 71 m.
A heat engine has an efficiency of 25%, and its heat input is 600 J per cycle from the high-temperature reservoir
You are a professional frontier re-enactor who specializes in making lead shot. To do this you put 2 kg of ice into 2 kg of water, both at 0 C, into an insulated bucket.
A 1.6-rm MHz sound wave travels through a pregnant woman's abdomen and is reflected from the fetal heart wall of her unborn baby. The heart wall is moving toward sound receiver as the heart beats.
A circuit consists of a resistor in series with an inductor and an ac generator that supplies an rms voltage of 115 V. Find the average power dissipated in the circuit
A skier leaves the starting gate at the top of a ski jump with an initial speed of 4 m/s. the starting position is 120 m higher than the end of the ramp, which is 3 m above the snow. FIND THE FINAL SPEED of the skier if he lands 145 m down the 20 deg..
The average force exerted on him by the ground is +18000 N, where the upward direction is taken to be the positive direction. From what height did the student fall? assume that the only force acting during the collision is that due to the ground.
Two point charges q1 = 4.0 ?C and q2 = -8.0 ?C are placed along the x-axis at x1 = 0 m and x2 = 0.20 m, find the electric potential energy of this system of charges
Today's terrestrial background radiation is about 50 mrem/year, mainly due to the uranium and thorium decay chains, and potassium. The earliest evidence of life on earth was about 3.5 billion years ago.
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