1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
JulijaS [17]
3 years ago
13

A wind turbine designer is considering installing a horizontal axis wind turbine at a location in Michigan. To increase the powe

r extracted from wind, the designer is debating between increasing the blade radius by 10% versus increasing the height from 40 m to 60 m, which would increase the average wind speed from 6 mph to 6.5 mph. Considering the only the impact on power extraction, the designer should go with the height increase.
a. True
b. False
Engineering
1 answer:
bogdanovich [222]3 years ago
3 0

Answer:

False ( B )

Explanation:

considering that the wind turbine is a horizontal axis turbine

Power generated/extracted by the turbine can be calculated as

P =  n * 1/2 *<em> p</em> *Av^3

where: n = turbine efficiency

           <em>p = air density </em>

<em>            </em>A = πd^2 / 4

           v =  speed

From the above equation it can seen that increasing the Blade radius by 10% will increase the Blade Area which will in turn increase the value of the power extracted by the wind turbine

You might be interested in
Jelena is 26 and has worked in the service industry for most of her work history. She is willing to advance her education and tr
katrin2010 [14]
Customer service

Since she has reckless driving and her record, anything involving driving of some sorts mechanics as well won’t work well with her!! Hope this helps
8 0
3 years ago
Natural Convection Cooling of an Orange. An orange 102 mm in diameter having a surface temperature of 21.1°C is placed on an ope
natali 33 [55]

Answer:

q = 3.181 w

Explanation:

T_w =  21.1degree celcius

T_b = 4.4degree celcius

D = 0.102 m

Radius = 0.051 m

\Delta T = T_w - T_b= 21.4 - 4.4 = 16.7 degree celcius

L^3 \Delta t = 0.051^3\times 16.7 = 2.22\times 10^{-3}

h = 1.37 (\frac{\Delta}{L})^{1/4}

  = 1.37\times (\frac{16.7}{0.051})^{1/4}

h = 5.828 w/m^2 K

A =4\pi r^2

A = 4\times \pi 0.05^2 = 0.03268 m^2

q = hA\Delta t

h =5.828 (0.03268) 16.7

q = 3.181 w

7 0
4 years ago
Plastic parts produced by an injection-molding operation are checked for conformance to specifications. Each tool contains 11 ca
Wittaler [7]

Answer:

a) 0.27 %                                  b) 0.27%

Explanation:

a) The inspector can choose 1 part from 11 parts in  11C1 ways. These are total number of mutually exclusive events.

Now three cavities are effected by temperature Malfunction that results in the parts that do not conform to specifications. To obtain exactly 1 non conforming part the inspector have to choose from one of the three cavities that are effected by temperature. This can be done in 3C1 ways.

Probability that inspector finds out exactly 1 non conforming part is,

Probability = \frac{3C1}{11C1}  

         Probability  =    \frac{\frac{3!}{1!(3-1)!} }{\frac{11!}{1!(11-1)!} }     = 3 / 11

                            =  0.27 %

b)  As the inspector is choosing only 1 part for inspection so the probability to find exactly 1 non conforming part is same as the probability to find at least 1 non conforming part.

    So the probability is 0.27 %.

8 0
4 years ago
8. In a closed hydraulic brake system, the hydraulic pressure:
DiKsa [7]

Answer:

A. Is constant

Explanation:

This is in accordance with pascal's law of pressure that states the hydraulic pressure in a fluid is transmitted undiminished to every portion of the fluid.

3 0
3 years ago
Read 2 more answers
Identify three things an engineer will document or determine during the reverse engineering process.
natka813 [3]

Answer:

repeat ,, look true everything again

Explanation:

to repeat the process again to see if the results will be the same.

7 0
3 years ago
Other questions:
  • A 12-kN tensile load will be applied to a 50-m length of steel wire with E = 200 GPa. Determine the smallest diameter wire that
    6·1 answer
  • The underground storage of a gas station has leaked gasoline into the ground. Among the constituents of gasoline are benzene, wi
    12·2 answers
  • How old must you be to operate a forklift
    10·2 answers
  • Air suspension in german cars
    13·1 answer
  • In the fully developed region of flow in a circular pipe, does the velocity profile change in the flow direction?
    6·1 answer
  • A) Consider an air standard otto cycle that has a heat addition of 2800 kJ/kg of air, a compression ratio of 8 and a pressure an
    7·1 answer
  • If it takes a planet 0.8 years to orbit the sun how long in years will it take the planet to go all the way around our sky once
    5·1 answer
  • Which Salesforce editions provide option for customizing profiles?
    13·1 answer
  • Christopher has designed a fluid power system that repeatedly gets clogs. Which of the following objects should he choose to add
    13·1 answer
  • Give the largest positive number that can be represented in 13 bits for the two cases:
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!