What is resistivity?

Physics

1 answer:

Rom4ik [11]3 years ago

3 0

Answer:

Resistivity, electrical resistance of a conductor of unit cross-sectional area and unit length.

Explanation:

A characteristic property of each material, resistivity is useful in comparing various materials on the basis of their ability to conduct electric currents. High resistivity designates poor conductors.

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A 70.0 kg person jumping down from a 3.00 meter wall hits the ground at 7.70 m/s. He hits the ground with stiff legs and stops i

shusha [124]

Answer:

$F_{net} = 24434.783\,N$

Explanation:

Let consider that the person hit the ground in the negative direction. The physical model for the impact is modelled after the Impact Theorem:

$m_{person}\cdot v + Imp = 0$

The impact is:

$Imp = - m_{person}\cdot v$

$Imp = - (70\,kg)\cdot (-7.70\,\frac{m}{s} )$

$Imp = 539\,N\cdot s$

The force of impact is derived as follows:

$F_{net} = \frac{Imp}{\Delta t}$

$F_{net} = \frac{539\,N\cdot s}{0.023\,s}$

$F_{net} = 24434.783\,N$

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Nothing on that list of choices is a requirement.

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Answer:

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Explanation:

from google

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A vertical wall (8.7 m x 3.2 m) in a house faces due east. A uniform electric field has a magnitude of 210 N/C. This field is pa

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Answer:

$\phi=4344.72Nm^2/c$