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3 years ago

Express 9.39x10^9 seconds in terms of days

Physics

2 answers:

natka813 [3]3 years ago

6 0

Answer:

There is an error in the answer before. 9.39 x 10^9 seconds is 108680.56 days

Explanation:

The reason is you have to convert, from seconds, to minutes, then to hours and then to days.

To minutes, you divide by 60.

9390000000/6 = 1565000000 minutes

From minutes to hours, divide by 60

1565000000/60=26083333.334

Finally, from hour to days, divide by 24

26083333.334/24=1086805.56

LenaWriter [7]3 years ago

3 0

First we figure out how many seconds that is

9,390,000,000

then divide by 60 to get how many hours that is

156,500,000

now divide by 24 to get the number of days

6520833 and 1/3

that is how many days it is

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Answer:

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Solution:

Mass flow rate, $\dot{m} = 0.4\ kg$

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Viscosity, $\mu = 0.00079\ Ns/m^{2}$

Now,

To calculate the convection heat coefficient, h:

Determine the cross sectional area of the circular tube:

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Determine the velocity of the fluid inside the tube by mass flow rate:

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v = 2.624 m/s

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$R_{e} = \frac{990\times 0.014\times 2.624}{0.00079} = 46036.253$

Thus it is clear that $R_{e}$ > 10,000 hence flow is turbulent.

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$N_{u} = \frac{dh}{K}$

where

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$292.42 = \frac{0.014\times h}{0.74}$

$h = 15456.48\ W/m^{2}K$

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