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A spherical capacitor is comprised of a solid inner conduction sphere of radius a with positive charge Q and an isolated, concentric, thin outer conduction shell of radius b and charge -Q. Derive the capacitance expression for this arrangement. What is the value of the capacitance for a = 10mm and b = 15 mm?
Then what is the capacitance if the outer shell is removed, i.e. for an isolated sphere?
you are standing on a bridge that is 50.0 m above a dried up riverbed. what is the minimum spring constant that the bungee cord must have for you not to hit the riverbed
Two cars were firstly at rest and side-by-side between two photogates. The mass of cart 1 was 0.505kg. The spring was activated and two carts moved away from one another, passing through the photogates and producing the readings as shown below. Find ..
determine the force in members cd and gf of the truss and state if the members are in tension or compression. also
You drive 110 km/h east for 35 min, then 83 km/h north for 46 min. Find your average velocity for the entire trip
A 500kg helicopter ascends from the ground with an acceleration of 2.00m/s^2 over a 5.00second interval, what is the work done by the gravitational force
The coefficients of friction between a block of mass 1.0 kg and a surface are ?s = 0.75 and ?k = 0.40. What is the magnitude of the frictional force
An object of mass m moves to the right with a speed v. It collides head-on with an object of mass 3m moving with speed v/3 in the opposite direction. what is the speed of the combined object
a skier of mass 100 kg, starts from rest as the top of a frictionless incline of height 20 m, how far does she travel on the horizontal surface before coming to rest
A Football is kicked at 45degrees and travels 82m before hittingthe ground. What is its initial velocity? How long is it in the air?
A 370-kg sailboat has an acceleration of 0.87 m/s2 at an angle of 64° north of east. Find the magnitude and direction of the net force that acts on the sailboat.
A rock has a narrow crack (width 1.9 mm) into which water can penetrate. When this water freezes, it expands. Calculate the pressure on the rock when the water freezes
A proton is traveling due west with a speed of 4E5 m/s and enters a magnetic field of 5E -5 T directed at 30.0 degrees to the direction of the proton's motion, obtain the magnitude and direction of the force on the proton
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