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2 x 10⁻¹⁸ C is the charge on each of the pieces.
In physics, Charge is electric charge, electrical charge, or electrostatic charge and symbolized as q, is a characteristic of a unit of matter that expresses the extent to which it has more or fewer electrons than protons.
According to the question,
Fс = 4 x 10⁻²³ N
d = 0.03 m , k = 9.0 x 10⁹ N·m²/C²
q =?
The force exerted by one charge q on another charge Q a distance r away is given by:
Coulomb's law:
Fc =[tex]\frac{kq_{1} q_{2} }{d^{2} }[/tex]
By solving the equation:
[tex]q1q2 =\frac{F_{c} d^{2} }{k}[/tex]
[tex]\frac{(4*10^{-23}(0.03m )^{2} }{(9.0*10^{9}N.m^{2}/C^{2}) }[/tex]
= 4 x 10 ⁻³⁶C²
This is the square of the charge on the pieces of puffed rice.
Now, to find the charge on one piece of puffed rice,
take the square root of this number.
q = √4 x 10⁻³⁶ C²
q = 2 x 10⁻¹⁸ C
Therefore,
The charge on each of the pieces is 2 x 10⁻¹⁸ C
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