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3 years ago

Do any of you have an email to contact brainly support? The contact us does not seem to work. Thanks!

Engineering

1 answer:

Marysya12 [62]3 years ago

3 0

Answer:

I think that if you go to the settings page, there should be a "contact us" option.

Hope this helped!! :)

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The head difference between the inlet and outlet of a 1km long pipe discharging 0.1 m^3/s of water is 0.53 m. If the diameter is

Reptile [31]

Answer:

The correct option is 'e': f = 0.05.

Explanation:

The head loss as given by Darcy Weisbach Equation is as

$h_{l}=\frac{flv^{2}}{2gD}$

where

$h_{l}$ is head loss in the pipe

'f' is the friction factor

'l' is the length of pile

'v' is the velocity of flow in pipe

'D' is diameter of pipe

From equation of contuinity we have $v=\frac{Q}{A}$

Thus using this in darcy's equation we get

$h_{l}=\frac{flQ^{2}}{2gDA}$

where

'Q' is discharge in the pipe

'A' is area of the pipe $A=\frac{\piD^2}{4}$

Applying the given values we get

$h_{l}=\frac{8flQ^{2}}{\pi ^{2}gD^{5}}$

Solving for 'f' we get

$f=\frac{0.53\times \pi ^{2}\times 9.81\times 0.6^{5}}{1000\times 0.1^{2}\times 8}\\\\f=0.05$

7 0

3 years ago

The two basic categories of electrical switches are manual and ??

Ganezh [65]

Answer:

are Manual and Automatic

4 0

3 years ago

Read 2 more answers

If you could drive one car for the rest of your life what would it be? Type in comments if you want to answer. Mine is either a

grandymaker [24]

Answer:

the kind of car I want to ride for the rest of my life is Lamborghini.

Explanation:

3 0

3 years ago

Which of these items is least likely to cause an exhaust emission test failure as of a result of excessive nox emissions? a) poo

Iteru [2.4K]

The item that is least likely to cause an exhaust emission test failure as of a result of excessive nox emissions is; poorflow through the egr system.

<h3 /><h3>What is an exhaust emission?</h3>

Exhaust emissions simply means substances emitted into the atmosphere from the exhaust discharge nozzle of an aircraft or aircraft engine.

Now, when the test fails as a result of excessive nox emissions, we can say that high NOx emissions can occur when an engine's air-fuel mixture is too lean. Thus, we can conclude that the reason for exhaust emission test failure as of a result of excessive nox emissions is due to poorflow through the egr system.

Read more about emissions at; brainly.com/question/14154063

7 0

3 years ago

g a heat engine is located between thermal reservoirs at 400k and 1600k. the heat engine operates with an efficiency that is 70%

Bond [772]

Answer:

<em>Heat rejected to cold body = 3.81 kJ</em>

Explanation:

Temperature of hot thermal reservoir Th = 1600 K

Temperature of cold thermal reservoir Tc = 400 K

<em>efficiency of the Carnot's engine = 1 - </em> $\frac{Tc}{Th}$ <em> </em>

eff. of the Carnot's engine = 1 - $\frac{400}{600}$

eff = 1 - 0.25 = 0.75

<em>efficiency of the heat engine = 70% of 0.75 = 0.525</em>

work done by heat engine = 2 kJ

<em>eff. of heat engine is gotten as = W/Q</em>

where W = work done by heat engine

Q = heat rejected by heat engine to lower temperature reservoir

from the equation, we can derive that

heat rejected Q = W/eff = 2/0.525 = <em>3.81 kJ</em>

6 0

3 years ago