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Triss [41]
4 years ago
6

Need help fast I been stuck in this for the longest

Engineering
1 answer:
gavmur [86]4 years ago
6 0

Answer:

3rd and 4rth

Explanation:

a geologist studies the earth and both of these have something to do with the earth

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In which step of the seven-step systematic economic analysis technique (SEAT) would multiple criteria be considered rather than
mojhsa [17]

Answer: b) Select the preferred investment.

Explanation:

The seven-step systematic economic analysis technique (SEAT) are:

• Identifying investment alternatives

• Defining planning horizon

• Specifying discount rates

• Estimating cash flows

• Comparing alternatives

• Performing supplementary analysis

• Selecting preferred investment.

It should be noted that selecting preferred investment is the final stage and at this stage, many factors have to be considered before a final decision is made. To maximize the the present worth, multiple criteria are taken into consideration rather than a single criteria.

Therefore, select the preferred investment is the correct answer.

5 0
3 years ago
Estimate the theoretical fracture strength of a brittle material if it is known that fracture occurs by the propagation of an el
Allisa [31]

Answer:

theoretical fracture strength  = 16919.98 MPa

Explanation:

given data

Length (L) = 0.28 mm = 0.28 × 10⁻³ m

radius of curvature (r) = 0.002 mm = 0.002 × 10⁻³ m

Stress (s₀) = 1430 MPa = 1430 × 10⁶ Pa

solution

we get here theoretical fracture strength s that is express as

theoretical fracture strength  =   s_{0} \times \sqrt{\frac{L}{r} }   .............................1

put here value and we get

theoretical fracture strength  =    1430 \times 10^6\times \sqrt{\frac{0.28\times 10^{-3}}{0.002\times 10^{-3}} }  

theoretical fracture strength  =  16919.98 \times 10^6  

theoretical fracture strength  = 16919.98 MPa

3 0
3 years ago
The water in a large lake is to be used to generate electricity by the installation of a hydraulic turbine-generator at a locati
Lynna [10]

Answer:

a) 0.76

b) 0.80

c) 1964 kW

Explanation:

GIVEN DATA:

\dot m = 5000 kg/s

Assume Mechanical energy at exist is negligible

A) Take lake bottom as reference, and then kinetic and potential energy  are taken as zero.

change in mechanical energy is givrn as

e_{in} - e_{out} = \frac{P}{\rho} - 0 = gh = 9.81 \times 50( \frac{1 kJ/kg}{1000 m^2/s^2}

                         = 0.491 kJ/kg

\Delta \dot E_{mec} = \dot m (e_{in} - e_{out}) = 5000 \times 0.491 = 2455 kW

\eta_{OVERALL}  = \frac{\dot W}{\Delta \dot E_{mec}} = \frac{1862}{2455} = 0.76

B) \eta -{gen} = \frac{\eta_{overall}}{\eta_{gen}} = \frac{0.76}{0.95} = 0.80

c) \dot W_{shaft} = \eta_{overall} \left | \Delta \dot E_{mec} \right | = 0.80(2455)

\dot W_{shaft} = 1964 kW

7 0
4 years ago
The polycarbonate shell functions as all of the following except:
krok68 [10]

Answer:

what are the answers expect what?

Explanation:

Polycarbonate is commonly used in eye protection, as well as in other projectile-resistant viewing and lighting applications that would normally indicate the use of glass, but require much higher impact-resistance. Polycarbonate lenses also protect the eye from UV light.

6 0
3 years ago
Si la demanda por un bien final es elástica, entonces la demanda de trabajo correspondiente también es elástica
shusha [124]

Answer:

You can speak English to help you

4 0
3 years ago
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