Answer:
The positions are 0.0194 m and - 0.0194 m.
Explanation:
Given;
amplitude of the simple harmonic motion, A = 2.0 cm = 0.02 m
speed of simple harmonic motion is given as;

the maximum speed of the simple harmonic motion is given as;

when the speed equal one fourth of its maximum speed


Thus, the positions are 0.0194 m and - 0.0194 m.
Answer:

Explanation:
THE GIVEN sheet can be taken as two horizontal force with surface charge density is
at one surface is ∈_1 = 
at oher surface is ∈_2= 
the magnitude of electric field due to surface charge is given as
So, electric field at P (2 CM below from surface is) = E_1 +E_2



Answer:
Force = mass * acceleration
F = m*a
Hope this helps
The molecule they all come from is water molecule