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Two parallel sheets each have large area A and are separated by a small distance R. The surface charge densities are σ and -σ . You wish to pull one of the sheets away from the other, by a small distance x. How much work does this require? Calculate this by:
(a) using the relation W = (force) × (distance);
(b) calculating the increase in energy stored in the electric field. Show that these two methods give the same result.
Water has a mass per mole of 18.0 g/mol, and each water molecule (H2O) has 10 electrons. How many electrons are there in 4.95 liters of water
A baseball pitcher throws a 145 g baseball parallel to the ground with a speed of 24.76 m/s in the +x direction. What is the velocity of the ball after leaving the bat
An initially neutral conductor contains a hollow cavity in which there is a -100 nC point charge. what is the charge on the inner wall of the cavity wall
A system consists of 2.0kg of water at 75 degrees Celsius. 25 J of work is done on the system by stirring with a paddle wheel, What is the change in internal energy of the system
A house has a floor area of 102 m2 and an outside wall that has an area of 33 m2. Calculate the magnetic flux that passes through the floor
A potter's wheel having a radius 0.48 m and a moment of inertia of 12.3 kg · m2 is rotating freely at 55 rev/min. Find the effective coefficient of kinetic friction between the wheel and the wet rag
Determine the ratio of the intensity at an angle of 0.135 degree from the centerline to the intensity at the peak of the central maximum
Without taking the existence of the nebula into consideration, based on its apparent magnitude, how far away does the star in part (b) appear to be? What would the propotion error be in determining the distance if interstellar extinction were negl..
ject located at the origin and having mass M explodes into three pieces having masses M/6, M/3, and M/2. What are the velocity components of the third piece
A 64 kilogram person is ice-skating due north with a velocity of 6.3 m/s when he collides with a 43 kilogram boy. determine the magnitude of the boy velocity
Suppose you form a dipole from two point charges (with a magnitude of charge, q). the postive charge is located at the point x=y=0, z=d/2. and the negative charge is located at x=y=0, z=-d/2.
Consult Interactive Solution 7.10 for a review of problem-solving skills that are involved in this problem. A stream of water strikes a stationary turbine blade horizontally, as the drawing illustrates.
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