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trapecia [35]
2 years ago
15

The costs of mining and transporting coal are roughly independent of the heating value of the coal. Consider:

Engineering
1 answer:
Paul [167]2 years ago
5 0

Answer:

2

Explanation:

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wariber [46]

D) cost


The fund available for a project is the first factor to be considered to ensure that the project comes to reality and serve it’s purpose

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The football team has a total of 20 jerseys. There are 6
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2 years ago
Can you determine the critical distance along a flat surface?
Keith_Richards [23]

Explanation:

Consider a fluid of density, ρ moving with a velocity, U over a flat plate of length, L.

Let the Kinematic viscosity of the fluid be ν.

Let the flow over the fluid be laminar for a distance x from the leading edge.

Now this distance is called the critical distance.

Therefore, for a laminar flow, the critical distance can be defined as the distance from the leading edge of the plate where the Reynolds number is equal to 5 x 10^{5}

And Reynolds number is a dimensionless number which determines whether a flow is laminar or turbulent.  

Mathematically, we can write,

    Re = \frac{\rho .U.x}{\mu }

or 5 x 10^{5} =  \frac{\rho .U.x}{\mu } ( for a laminar flow )

Therefore, critical distance

x=\frac{5\times 10^{5}\times \mu }{\rho \times U}

So x is defined as the critical distance upto which the flow is laminar.

6 0
2 years ago
A refrigerator has a COP of 1.5. That is, the refrigerator removes 1.5 kWh of energy from the refrigerated space for each 1 kWh
svetoff [14.1K]

Answer:

The answer is, It doesn't violate the first law of thermodynamics

Explanation:

The reason is that a refrigerator system does not create energy, it only does work by removing heat from a system or surrounding.

What is the first law of thermodynamics?

The first law of thermodynamics, also known as Law of Conservation of Energy, states that energy can neither be created nor destroyed; energy can only be transferred or changed from one form to another.

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Welding is a common type of _____ technique.
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I think it is attacking technique?

8 0
3 years ago
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