Both objects have the same electrical charge. Opposite charges attract. And if they were neutral they would not do anything.
Which of the following is it though...?
The direction of motion of the charge
The answer would be "mechanical". Hope I helped. :)
Answer:
V = 31.62 m V
Explanation:
Given,
Voltage across thick membrane = ?
Thickness of the membrane, d = 5.5 n m
Electric field = 5.75 M V/m
we know

V = E d
V = 5.75 x 10⁶ x 5.5 x 10⁻⁹
V = 31.62 x 10⁻³ V
V = 31.62 m V
Hence, The Voltage across the membrane is equal to 31.62 m V.