It is a solid substance that has a conductivity between that of an insulator and that of most metals, either due to the addition of an impurity or because of temperature effects
C is the correct answer. Opposites attract!
There is a missing part in the question. Found the complete text on internet:
"<span>What is the largest size vehicle (kg) it can lift if the diameter of the output line is 28.0 cm? "
Solution
The diameter of the piston is 28.0 cm, this means its radius is 14.0 cm (half the diameter), so the area of the piston is
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The maximum pressure of the lift is
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Therefore the maximum force the piston can lift is
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And the size (the mass) of the vehicle is
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Lighting is the static electricity stored in the clouds that is disposed to the earth.
Answer: B
Explanation: i learned it last year