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3 years ago

Name the famous engineer in the world

2 answers:

7 0

Answer: Nikola Tesla. Arguably at the top of the list of greatest engineers is Nikola Tesla. He was Serbian, and moved to America at the age of 28 to work with Thomas Edison.

Explanation:

fgiga [73]3 years ago

5 0

Answer:

Nikola Tesla

Explanation:

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A piston-cylinder device contains 0.15 kg of air initially at 2 MPa and 350 °C. The air is first expanded isothermally to 500 kP

Semmy [17]

Answer:

Isothermal expansion W₁ =-37198.9 J

Polytropic Compression W₂ =-34872.82 J

Isobaric Compression W₃ = -6974.566 J

The net work for the cycle = -79046.29 J

Explanation:

Mass of air = 0.15 kg = 150 g

Molar mass = 28.9647 g/mol

Number of moles = 150 g /28.9647 g/mol = 5.179 moles of air

PV = nRT therefrore V = nRT/(P) = 5.179*8.314*(350+273.15)/(2×10⁶) = 0.0134167 m³

For isothermal expansion we have

P₁V₁ = P₂V₂ or V₂ = P₁V₁/P₂ = 2×10⁶*0.0134167 / (5×10⁵) = 0.0536668 m³

Therefore work done

W₁ = -nRTln(V₂/V₁) = -26833ln(4) = -37198.9 J

Stage 2

Compression polytropically we have

$\frac{P_2}{P_3} = (\frac{V_3}{V_2} )^n$ where P₃ = 2 MPa

Therefore V₃ = $(\frac{1}{4} )^{\frac{1}{1.2} }*V_2$ = 1.6904×10⁻² m³

Work = W₂ = $\frac{P_2V_2-P_3V_3}{n-1}$ = -34872.82 J

$\frac{P_2}{P_3} = (\frac{T_2}{T_3} )^\frac{n}{n-1}$ or T₃ = $T_2*(\frac{P_3}{P_2})^\frac{n-1}{n}$ = 785.12 K

Isobaric compression we have thus

Work done W₃ = P(V₁ -V₃) = -6974.566 J

Total work = W₁ + W₂ + W₃ = -37198.9 J + -34872.82 J + -6974.566 J = -79046.29 J

7 0

3 years ago

This is a classification of back pain based on duration. A) AcuteB) RecurrentC) ChronicD) All of the above

butalik [34]

Answer:

D) All of the above.

4 0

3 years ago

Describe the distribution of laminations used in the fabrication of a glulam member that is to be used principally as a bending

Mashcka [7]

Answer:

Glulam is an industrial wood product that optimizes the structural qualities of wood. These structural elements are composed of individual segments whose dimensions correspond to the natural wood from which they originate. These segments are joined at their ends for the production of longer elements, which are then glued with adhesives in order to create the required dimensions of the structural elements.

Explanation:

Thanks to its composition, larger glulam elements can be manufactured from smaller trees. Glulam offers builders and designers the strength and versatility of the structural elements of wood, but they would no longer depend on wood that comes from old trees.

Glulam has a higher stiffness than ordinary wood and is stronger than steel. This means that the structural elements of glulam have greater flexibility and can be used in the construction of homes or bridges.

3 0

3 years ago

For each topic, find the total number of blurts that were analyzed as being related to the topic. Order the result by topic id.

photoshop1234 [79]

Answer:

Explanation: see attachment below

8 0

3 years ago

What is the function of the following: 1- Oil rings 2- Flywheel 3- Timing gears

Tanya [424]

Answer:

Explanation:

The functions of the following are as follows:

1). Oil Rings:

Regulates oil within cylinder walls.
Helps to keep cylinder walls lubricated
Prevent Heat transfer

Reduce friction between piston and cylinder

2). Fly Wheel:

It is used to store rotational energy
It resist any change in rotational speed due to its moment of inertia
It helps to control the orientation of the mechanical system

3). Timing gears:

It provides synchronization in the rotation of crankshaft and the camshaft so as to provide proper valve opening and closing time during each cylinder's stroke(intake and exhaust).

4 0

3 years ago

Name the famous engineer in the world​

Name the famous engineer in the world