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4 years ago

Resistivity of a material is the resistance of a cm long sample of the material of 1 cm2 cross-sectional area.

Physics

1 answer:

vova2212 [387]4 years ago

7 0

Yes the formula of resistivity is:

$R=\dfrac{\rho l}{A}$

Where $\rho$ is relativistic resistance with units $\dfrac{\Omega}{m}$ , each metal has different relativistic resistance you must find the relativistic resistance of your material using the table of relativistic resistances.

$l$ stands for the length of a wire.

$A$ stands for the area of the wire. Usually it is equal to $\pi r^2$ because.

So now we have data $A=1cm^2$ but nothing else was specified so we are unable to calculate anything.

Hope this helps.

r3t40

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hichkok12 [17]

Answer:

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Re-arrange for m_2,

$m_2 = \frac{1}{2g} C_d \rho A V^2 -m_1$

Our values are given by,

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Replacing in the equation we have,

$m_2 = \frac{1}{2(9.8)}(0.5) (1.22) (\pi*(16.35*10^{-2})^2)*66.7^2 -3$

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3 years ago

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