A water tank has 4 inlet pipes of the same size. If only 3 pipes are opened at a time it takes 6 hours to fill the water tank, find the time taken to fill the tank if all the 4 pipes are opened simultaneously. Also, find the time taken to fill the water tank if only 2 pipes are opened at a time.​

Answer:

The work done during an isothermal reversible expansion of an ideal gas from one volume to another volume is option [tex](\ 1\ )[/tex],

W   [tex]=[/tex]  [tex]-\ 2.303[/tex]  × [tex]8.31[/tex] × [tex]10^{7}[/tex] × [tex]298[/tex] × [tex]log\ 2[/tex]

Explanation:

It is given that the process is a reversible expansion of one mole of an ideal gas· Here, the temperature is a constant one which is [tex]27^{o}c[/tex]· So, the actual process is an isothermal reversible expansion of an ideal gas·

The equation for the work done during an isothermal reversible expansion of an ideal gas from one volume to another volume is given as,

    [tex]W\ =\ -\ 2.303\ \ n\ R\ T\ \ log\ \frac{V_2}{V_1}[/tex]

where,

W  [tex]=[/tex]  work done during the expansion

n   [tex]=[/tex]  No of moles of the gas

R  [tex]=[/tex]   Universal gas constant

T  [tex]=[/tex]  Temperature

[tex]V_1[/tex]  [tex]=[/tex]  The initial volume of the gas

[tex]V_2[/tex] [tex]=[/tex]  The final volume of the gas

Given that,

n  [tex]=[/tex]  [tex]1[/tex] mol

T  [tex]=[/tex]  [tex]25^oc\ \ =\ 25\ +\ 273\ =\ 298\ K[/tex]

[tex]V_1[/tex] [tex]=[/tex]  [tex]10\ L[/tex]

[tex]V_2[/tex] [tex]=[/tex]  [tex]20\ L[/tex]

Since we need to find out the work done in ergs, the SI unit of the R-value becomes,

R   [tex]=[/tex]  [tex]8.314[/tex] [tex]J\ K^-^1\ mol^-^1[/tex]

where,

[tex]1\ J\ =\ 10^7 ergs[/tex]

Therefore,

R   [tex]=[/tex]  [tex]8.314\ *\ 10^7[/tex] [tex]erg\ K^-^1\ mol^-^1[/tex]

On substituting these values we get,

W   [tex]=[/tex]  [tex]-\ 2.303[/tex]  × [tex]1[/tex] × [tex]8.31[/tex] × [tex]10^{7}[/tex] × [tex]298[/tex] × [tex]log\ \frac{20}{10}[/tex]

W   [tex]=[/tex]  [tex]-\ 2.303[/tex]  × [tex]8.31[/tex] × [tex]10^{7}[/tex] × [tex]298[/tex] × [tex]log\ 2[/tex]

Therefore, the work done during an isothermal reversible expansion of an ideal gas  from one volume to another volume is,

W   [tex]=[/tex]  [tex]-\ 2.303[/tex]  × [tex]8.31[/tex] × [tex]10^{7}[/tex] × [tex]298[/tex] × [tex]log\ 2[/tex]

Explanation:

1.length

2.retardation

3.pressure

4.Homogeneous

5.neutrons

6.18

Answer:

a- Length

b- retardation

c- mass

d- homogenous

e- protons and neutrons

f- 18th group

g- coelentrata

h- don't know

i- hydrophytes

j- schlerechyma

k- hydrotropism

l- vitamin

Please mark me as the Brainliest....

Answer:

b.20%

Step-by-step explanation:

Last year's sales = $320 million;

This year's sales = $385 million;

Increase = $65 million.

Now, 20% of $320 million is $64 million, which is very close to actual increase of $65 million.

Answer: C.

OR:

General formula for percent increase or decrease, or percent change:

Answer:

20%

Step-by-step explanation:

last year=320millon

this year=385million

increase in this year=65million

20%of 320million is64%.

so it can be approximately answer c that is 17%

Answer:

HOPE IT HELPS

Explanation:

Traditional dress for men is a long white cotton shirt and head-dress secured by a leather rope. The traditional dress for women is a long black cloak over long loose clothing and a black headscarf. Some local women also cover their face in various ways (sometimes the face is completely covered).