Answer:
a)The electric Field will be zero at the point between the sheets
b)
c)
Explanation:
Let 
be the surface charge density of the of the non conducting parallel sheet.Let consider a Gaussian surface in the form of of cylinder such that its cross-sectional is A . Then there will be flux only due to cross sectional area as the curved sectional is perpendicular to the the electric field so the Electric Flux due to it is zero.
Now using Gauss law we have, E be the electric Field at the distance r from the sheet then
The Field will be away from the sheet and perpendicular to it.
a) The Electric Field between them
b)The Electric Field to the right of the sheets
c)The Electric Field to the left of the sheets
<span>The Balmer series or Balmer lines in atomic physics, is the designation of one of a set of six named series describing the spectral line emissions of the hydrogen atom. The Balmer series is calculated using the Balmer formula, an empirical equation discovered by Johann Balmer in 1885. this is all I know sorry</span>
D. The osculations show a variable rate of motion. Hope this helps:)
The answer c - Half life how to figure, you first divide it by half then divide than number by half
