A long line carrying a uniform linear charge density +50. 0μc/m runs parallel to and 10. 0cm from the surface of a large, flat plastic sheet that has a uniform surface charge density of −100μc/m^2 on one side. Required:
a. Find the location of all points where an α particle would feel no force due to this arrangement of charged objects.
b. Choose an appropriate location of these points at a distance calculated in part A.

1. above the line
2. between the line and the sheet.

Two horizontal plates with infinite length and width are separated by a distance h in the z direction. the bottom plate is moving at a velocity u. the incompressible fluid trapped between the plates is moving in the positive x-direction with the bottom plate. align gravity with positive z. assume that the flow is fully-developed and laminar. if the systems operates at steady state and the pressure gradient in x-direction can be ignored, do the following: 1. sketch your system 2. identify the coordinate system to be used. 3. show your coordinates and origin point on the sketch. list all your assumptions. 5. apply the continuity equation to your system. nts of navier stokes equations of choice to your system 7. solve the resulting differential equation to obtain the velocity profile within the system make sure to list your boundary conditions. check units of velocity 8. describe the velocity profile you obtain using engineering terminology. sketch that on the same sketch you provided in (1). 9. obtain the equation that describes the volumetric flow rate in the system. check the units.

Ahot-air balloonist, rising vertically with a constant speed of 5.00 m/s releases a sandbag at the instant the balloon is 40.0 m above the ground. after it is released, the sandbag encounters no appreciable air drag. compute the velocity of the sandbag at 0.250 s after its release.

Which of the following are used in an electrochemical cell? a. electrodes b. electrolyte c. terminals d. all of the above