birdman2540
25.07.2019 •
Physics
What is the resistance of a 1.3-m-long copper wire that is 0.30 mm in diameter?
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Ответ:
where
is the resistivity of the material
L is the length of the wire
A is the cross-sectional area of the wire.
For the wire in the problem, the resistivity is (copper resistivity) . The length of the wire is L=1.3 m, while the cross-sectional area is
so the resistance of the wire is:
Ответ:
The Fahrenheit scale is a temperature scale based on one proposed in 1724 by the physicist Daniel Gabriel Fahrenheit (1686–1736). It uses the degree Fahrenheit (symbol: °F) as the unit. ... Canada has passed legislation favoring the International System of Units, while also maintaining legal definitions for traditional ...