Technician A says that the freezing point of a substance is the temperature at which the substance changes state from a solid to
1 answer:
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The capacitance of the capacitor is
Explanation:
The capacitance of a parallel-plate capacitor is given by the equation
where
k is the dielectric constant of the medium
is the vacuum permittivity
A is the area of the plates
d is the separation between the plates
For the capacitor in this problem, we have:
k = 2.1 is the dielectric constant
is the separation between the plates
(I assumed that 5.4 m is a typo, since it is not a realistic size for the side of the plate)
Therefore, the capacitance of the capacitor is
Learn more about capacitors:
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Answer with Explanation:
Let r be the resistance of short piece of copper wire.
Resistance of copper wire=R=
Resistance is directly proportional to length.
If a wire has greater resistance then,the wire will be greater in length.
Therefore,resistance of long piece of wire=7r
Total resistance of copper wire=Sum of resistance of two piece of wires
ohm
Resistance of long piece of wire=
Resistance of short piece of wire =
Resistivity of wire and cross section area of wire remains same .
Let L be the total length of wire and L' be the length of short piece of wire.
We know that
=
Where K==Constant
Using the formula
Length of short piece of wire=L'=
Length of long piece of wire=
% of length of short piece of wire=%
The resistance of the short piece=
The resistance of the long piece=