G A slab of uniform positive electric charge extends infinitely in the yz plane. The charge density is given by (xx, yy, zz) = 0 , − 1 < xx < 1 0, ℎ which is constant between -1 cm and 1 cm in the x direction and zero for all other values of x. a. Sketch the problem and the approximate electric field lines based on the symmetry. b. If the electric field in the x direction outside the slab is xx(xx > 1 ) = 5000 /, find the charge density 0 inside the slab. c. Find the electric field xx(xx) inside the slab. d. Find the electrostatic potential everywhere, given that V(0,0,0)=0 at the origin. Hint: if the electric field is only in the x direction, does V change when we vary y and z while keeping x constant? The line integral simplifies a lot here.

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Aball is thrown upward. at a height of 10 meters above the ground, the ball has a potential energy of 50 joules (with the potential energy equal to zero at ground level) and is moving upward with a kinetic energy of 50 joules. what is the maximum height h reached by the ball? consider air friction to be negligible. 1. h ≈ 10 m 2. h ≈ 50 m 3. h ≈ 30 m 4. h ≈ 40 m 5. h ≈ 20 m 003 10.0 points which of the two object shown below has the greatest kinetic energy? a m b 1 2 m v 2v 1. kinetic energies are the same. 2. a 3. b 4. unable to determine. 004 10.0 points tim, with mass 74.6 kg, climbs a gymnasium rope a distance of 3.1 m. the acceleration of gravity is 9.8 m/s 2 . how much potential energy does tim gain? answer in units of j. 005 10.0 points a car is moving at 64 miles per hour. the kinetic energy of that car is 5 × 105 j. how much energy does the same car have when it moves at 111 miles per hour? answer in units of j. 006 10.0 points an 102 kg man climbs up a 1 m high flight of stairs. the acceleration of gravity is 9.81 m/s 2 . w

If 2 moles of co_2 at 2l and 500k are expanded reversibly to 20l, more work can be obtained from an adiabatic process than from an isothermal process. is the above statement true or false?