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3 years ago

Select the correct answer.

Engineering

1 answer:

cricket20 [7]3 years ago

5 0

Answer:

The power generated by a wind farm is not constant because of irregular wind patterns.

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The yield strength of mild steel is 150 MPa for an average grain diameter of 0.038 mm ; yield strength is 250 MPa for average gr

djyliett [7]

Answer:

Explanation:

Hall-Petch equation provides direct relations between the strength of the material and the grain size:

σ=σ0+k/√d , where d- grain size, σ- strength for the given gran size, σ0 and k are the equation constants.

As in this problem, we don't know the constants of the equation, but we know two properties of the material, we are able to find them from the system of equations:

σ1=σ0+k/√d1

σ2=σ0+k/√d2 , where 1 and 2 represent 150MPa and 250MPa strength of the steel.

Note, that for the given problem, there is no need to convert units to SI, as constants can have any units, which are convenient for us.

From the system of equations calculations, we can find constant: σ0=55.196 MPa, k=18.48 MPa*mm^(0.5)

Now we are able to calculate strength for the grain diameter of 0.004 mm:

σ=55.196+18.48/(√0.004)=347.39 MPa

The strength of the steel with the grais size of 0.004 mm is 347.39 MPa.

6 0

4 years ago

The Keystone Pipeline has an inside diameter of 36 inches andcarries a flow rate of 590,000 barrels of crude oil per day at 40°C

xxTIMURxx [149]

Answer:

The pump horse power required per mile of pipe $45.22\ hp/mile$

Explanation:

The explanation is shown on the second third and fourth image

It make sense that the temperature of the oil is high even though the pipeline is in a cold environment this is so because where the oil is been tapped from is way hotter than the temperature of the pipeline environment because it is closer to the earths crust than the environment of the pipeline

7 0

3 years ago

Multimeter and the LCD is showing Hz. What's she measuring?

eimsori [14]

Answer:

i think its d frequency

Explanation:

hz on a multimeter means frequency setting

6 0

3 years ago

9. Technician A says to examine each bearing carefully for chips, pits, and scratches during servicing. Technician B says that d

Vanyuwa [196]

Answer:

a. is correct.

Explanation:

During servicing you should examine each bearing carefully for chips, pits, and scratches, so Technician A is correct.

Discoloration of a bearingbis not acceptable wear, so Technician B is false.

Combine the answers: Only Technician A is correct therefore answer a. is the right answer.

8 0

3 years ago

Read 2 more answers

1. One of these is NOT a type of pneumatic tool. Which one?

Serggg [28]

Answer:Circular

Explanation:

It’s the only thing not list under pneumatic tools‍♂️

5 0

3 years ago