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A hollow non-conductiong sphere has a uniform charge density ?. The inner and outer radius of the sphere are r1 and r2m respectively .
What is the total charge of this sphere?
What is the electric field at a point r < r1?
What is the electric field at a point r1 < r < r2?
What is the electric field at a point r > r2?
You are called as an expert witness in the trial of a traffic violation. The facts are these: A driver slammed on his brakes and came to a stop with constant acceleration, How fast was he going when he hit his brakes
A uniform disk of radius 0.46 m is mounted on a frictionless, horizontal axis. A light cord wrapped around the disk supports a 0.58 kg object. When free from rest the object falls with a downward acceleration of 4.1 m/s squared.
A park ranger's flashlight beam strikes a lake surface. What angle does the refracted ray make with the normal in the water
A 10 \rm g bullet traveling at 440m/s strikes a 12kg , 1.2-\rm m-wide door at the edge opposite the hinge. The bullet embeds itself in the door, What is the angular velocity of the door just after impact
The force of gravity due to the earth results in the balls each having a constant downward acceleration of 9.81 m/s2 How long after the blue ball is thrown are the two balls in the air at the same height
The critical angle for light traveling in a particular optical medium and incident on an interface with air is 46.7o. Calculate the refractive index of this medium
A kite is hovering over the ground at the end of a straight 45-m line. The tension in the line has a magnitude of 14 N. Find the height of the kite
A 7.9 kg ball that is originally 3.93 m above a spring is released from rest. How far will the spring compress when the ball lands on it
a steel oil pipeline spans a river gorge 100 m wide. the inside wall is electrically heated to reduce the viscosity of the oil to ease pumping, determine the heat lost per day for the pipe in calories
The filament of a light bulb has a temperature of 2.64 x 103 °C and radiates 60.0 W of power. The emissivity of the filament is 0.388. Find the surface area of the filament
A 6 m long 50 kg ladder leaning on a frictionless wall can successfully be scaled by a 120 kg man. find the minimum angle between the ladder and the floor
A 1.0 mCi source of Phosphorus called P-32, a beta emitter, is imlanted in a tumor where it is to administer 36 Gy. The half-life is 14.3 days and 1 mCi delivers about 10 mGy/min/ Approximately how long should the source remain implanted?
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