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GrogVix [38]
3 years ago
13

A water tank in the shape of an inverted right circular cone that has a height of 12 ft and a base radius 6ft. If water is being

pumped into the tank at a rate of 10 ft cubed per min , find the rate at which the water level is rising when the level of the water is 3 ft deep
Physics
1 answer:
8_murik_8 [283]3 years ago
3 0

Answer:

\dfrac{dh}{dt}=1.41\ ft/min

Explanation:

Given that

h= 12 ft

r= 6 ft

h= 2 r

r=h/2

We know that volume of cone given as

V=\dfrac{1}{3}\pi r^2h

Now by putting the values

r=h/2

V=\dfrac{1}{3}\pi\left(\dfrac{h}{2}\right)^2h

V=\dfrac{1}{12}\pi h^3

Given that when h= 3 ft

\dfrac{dV}{dt}=10\ ft^3/min

V=\dfrac{1}{12}\pi h^3

\dfrac{dV}{dt}=\dfrac{\pi}{12}(3h^2)\times \dfrac{dh}{dt}

By putting the values

10=\dfrac{\pi}{12}(3\times 3^2)\times \dfrac{dh}{dt}

\dfrac{dh}{dt}=1.41\ ft/min

So the rate at which the water level is rising  is 1.41 ft/min

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Answer:

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Norma-Jean [14]

Answer:

1.\theta=29.84^{0}

2.\theta=60.15^{0}

Explanation:

Polarizes axis can create two possible angles with the vertical.

first we have to find the intensity of  first polarizer

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I= \frac{655\frac{W}{M^{2} } }{2}

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For a smaller angle for the first polarizer:

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I_{2} =I_{1} Cos^{2}(90^{0} - \theta)

I_{2} =I_{1} sin^{2}\theta

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taking square root on both sides

\sqrt{\frac{163}{327.5} } = sin\theta

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\theta=29.84^{0}

For a larger angle for the first polarizer:

According to Malus Law

I_{2} =I_{1} cos^{2}\theta

\frac{I_{2} }{I_{1} }=Cos^{2}\theta

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hichkok12 [17]

Answer:

t=5.36\times 10^{-6}\ s

Explanation:

Given that,

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