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3 years ago

5

The image above shows a block pulled across a table. The spring scale which measures in Newtons, reads the force resisting the m

otion as___
A) drag force b) weight force c) gravity force d) friction force

1 answer:

yaroslaw [1]3 years ago

8 0

It is b weight force

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Unpolarized light is incident upon two ideal polarizing filters that do not have their transmission axes aligned. If 19% of the

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Answer:

51.94°

Explanation:

$I_0$ = Unpolarized light

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Polarized light passing through second filter

$I_2=\frac{I_0}{2}cos^2\theta\\\Rightarrow 0.19I_0=\frac{I_0}{2}cos^2\theta\\\Rightarrow cos^2\theta=\frac{0.19I_0}{\frac{I_0}{2}}\\\Rightarrow cos\theta=\sqrt{\frac{0.19I_0}{\frac{I_0}{2}}}\\\Rightarrow \theta=cos^{-1}\sqrt{\frac{0.19I_0}{\frac{I_0}{2}}}\\\Rightarrow \theta=cos^{-1}\sqrt{0.19\times 2}\\\Rightarrow \theta=cos^{-1}\sqrt{0.38}\\\Rightarrow \theta=51.94^{\circ}$

The angle between the two filters is 51.94°

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