3 years ago

Mirrors effectively operate because of this behavior of light

Physics

1 answer:

Monica [59]3 years ago

4 0

reflective i do believe

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We divide the thin rectangular sheet in small parts of height b and length dr. All these sheets are parallel to b. The infinitesimal moment of inertia of one of these small parts is
$dI =r^2*dm$
where $dm =M(b*dr)/(ab)$
Now we find the moment of inertia by integrating from $-a/2$ to $a/2$
The moment of inertia is
$I= \int\limits^{-a/2}_{a/2} {r^2*dm} = M \int\limits^{-a/2}_{a/2} r^2(b*dr)/(ab)=(M/a)(r^3/3)$ (from (-a/2) to $I=(M/3a)(a^3/8 +a^3/8)=(Ma^2)/12$ (a/2))

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4 years ago

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svetoff [14.1K]

Answer:

resistances is inversely proportional to the area of cross section of the conductor

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3 years ago

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Why is an increase in speed a curved line on a position vs. time graph but a straight diagonal line on a speed vs. time graph?

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