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user100 [1]
2 years ago
13

when light falls obliquely, there is a change in direction as it moves from one medium to another but when it falls perpendicula

r to the surface , there is no change in direction even when two mediums are involved JUSTIFY
Physics
1 answer:
exis [7]2 years ago
3 0

Answer:

wait in comments....................

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A fire hose has an inside diameter of 6.40 cm. Suppose such a hose carries a flow of 40.0 L/s starting at a gauge pressure of 1.
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Answer:

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Explanation:

Given that,

Diameter = 6.40 cm

Rate of flow = 40.0 L/s

Pressure P=1.62\times10^{6}\ N/m^2

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Q=Av

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Put the value into the formula

v=\dfrac{40.0\times10^{-3}}{3.14\times(3.2\times10^{-2})^2}

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Using formula of the Reynolds number

n_{R}=\dfrac{2\rho\times v\times r}{\eta}

Where, \eta =viscosity of fluid

\rho =density of fluid

Put the value into the formula

n_{R}=\dfrac{2\times100\times12.44\times3.2\times10^{-2}}{1.002\times10^{-3}}

n_{R}=7.945\times10^{5}

Hence, The Reynolds numbers for flow in the fire hose.

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3 years ago
you're reading from the journal of a European explorer from the early 1600s. In one passage, the explorer describes itting on th
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What is the acceleration due to gravity in a region where a simple pendulum having a length 75.000 cm has a period of 1.7357 s?​
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Answer:

Explanation:

T = 2π\sqrt{L/g}

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