3 years ago

Create a body composition and agility chart.

Physics

1 answer:

Allisa [31]3 years ago

8 0

Answer:

I think this is something you're looking for so I hope they help

Explanation:

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At what angle should the axes of two Polaroids be placed so as to reduce the intensity of the incident unpolarized light to 1515

Talja [164]

Complete Question

At what angle should the axes of two Polaroids be placed so as to reduce the intensity of the incident unpolarized light to 1/5.

Answer:

The angle is

Explanation:

From the question we are told that

The light emerging from second Polaroid is 1/5 the unpolarized

Generally the intensity of light emerging from the first Polaroid is mathematically represented as

$I_1 = \frac{I_o}{ 2 }$

Generally from the Malus law the intensity of light emerging from the second Polaroid is mathematically represented

$I_2 = I_1 cos^2 (\theta )$

=> $cos^2 (\theta ) = \frac{I_2}{I_1 }$

=> $cos (\theta) = \sqrt{ \frac{I_2}{I_1} }$

From the question $I_2 = \frac{I_o}{5}$

$cos (\theta) = \sqrt{ \frac{ \frac{ I_o}{5} }{\frac{I_o}{2} } }$

$cos (\theta) = \sqrt{ \frac{2}{5} }$

=> $\theta = cos ^{-1} [\sqrt{\frac{2}{5}} ]$

=> $\theta = 50.77^o$

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3 years ago

Because of churning rock and ash, the largest volcanic eruptions are sometimes surrounded by

Sonja [21]

Calderas are what sometimes surround it

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3 years ago

The minute and hour hands of a clock have a common axis of rotation and equal mass. The minute hand is long, thin, and uniform;

bekas [8.4K]

Answer:

b. less than

Explanation:

Moment of inertia decreases as angular velocity increases. Therefore, since the minute hand is faster than the hour hand, it is safe to say that the moment of inertia of the minute hand is less than the moment of inertia of the hour hand?

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How far would a cantaloupe fall in 5.0 seconds of true free fall?

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Answer:

i think the answer is about 50 m/s

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An object has an emissivity of 0.725. At temperature T, it radicates heat at a rate of 10 W. What is its rate of heat radiation

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Radiative power scales with the fourth power of temperature, so 160 W.

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3 years ago