A charge Q is positioned at the center of a sphere of radius R. The flux of the electric field through the sphere is equal to .
If the charge Q is now placed at the center of a cube the flux of the electric field through the surface of the cube is equal to A)
/2.
B)
.
C)
2.
D)
0.
E)
The value of the flux depends on the dimensions of the cube.
Question 2
At a fixed depth within a fluid at rest, the pressure pushing upward is
A)
less than the pressure pushing downward.
B)
zero, because pressure only pushes equal in all horizontal direction.
C)
zero, because the fluid above does not support the weight of the fluid below.
D)
greater than the pressure pushing downward.
E)
equal to the pressure pushing downward.
