Homework Answers
Claim Turbine A is true.
Claim Turbine B is false, because no turbine according to betz law can have efficiency greater than 59.3%(16/27 factor). But inventor of turbine B claims that his turbine has 65% efficiency which is impossible.
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Two dinerent inventors come up with two wind turtine designs with these claimed efficiencies: Turbine A:...
(LO5) In the following turbine designs, which two (2) are not used in hydroelectricy generation? a....
(LO5) In the following turbine designs, which two (2) are not used in hydroelectricy generation? a. Turgo turbine b. Francis turbine c. Gas turbine d. Kaplan turbine e. Pelton turbine f. Steam turbine
(LO5) In the following turbine designs, which two (2) are not used in hydroelectricy generation? a. Turgo turbine b. Francis turbine c. Gas turbine d. Kaplan turbine e. Pelton turbine f. Steam turbine
please explain It is claimed by wind-playing orchestral/band musicians that as their instruments warm up the...
please explain
It is claimed by wind-playing orchestral/band musicians that as their instruments warm up the pitch (frequency) of the notes played by the instrument goes up by a noticeable amount. (That is one of the reasons why wind players warm up before they perform.) Evaluate this claim. If it is reasonable, why? If it is not reasonable, why not? Explain your reasoning using your physics knowledge. If you are at a loss as to how to start thinking about...
A condition monitoring technique for wind turbine blades is used to detect faults, but is not...
A condition monitoring technique for wind turbine blades is used to detect faults, but is not perfect. It has a sensitivity of 97% (proportion of faulty blades correctly identified) and a specificity of 99% (proportion of blades without faults correctly identified), when used as part of routine maintenance. Assume that 1% of the blades have faults. (a) What proportion of blades tested will receive a negative result, i.e. claiming that they are without faults? In your working, define relevant events....
The mean work week for engineers in start-up companies is claimed to be about 58 hours...
The mean work week for engineers in start-up companies is claimed to be about 58 hours with a standard deviation of 8 hours. Kara, a newly hired engineer hopes that it's not (she wants it to be shorter). She asks 10 engineers in start-ups for the lengths of their mean work weeks. Their responses are 70; 45; 55; 60; 65; 55; 55; 60; 50; 55. a. Is the newly hired engineer testing a mean or a proportio... O proportion O...
An energy company wants to choose between two regions in a state to install energy-producing wind...
An energy company wants to choose between two regions in a state to install energy-producing wind turbines. A researcher claims that the wind speed in Region A is less than the wind speed in Region B. To test the regions, the average wind speed is calculated for ninety days in each region. The mean wind speed in Region A is 13.913.9 miles per hour. Assume the population standard deviation is 2.9 miles per hour. The mean wind speed in Region...
A game is played in which two quarters are tossed. If two heads come up, the...
A game is played in which two quarters are tossed. If two heads come up, the player wins $1. If a head and a tail come up, the player wins $0.50. If two tails come up, the player wins$0.25. If the game is to be fair, how much should a player expect to pay to play the game?
MIET 2480-Renewable Energy Systems-15 Jun 2019 Quiz 2: Wind Power Adeol Summanleknl Name: Student ID: 1....
MIET 2480-Renewable Energy Systems-15 Jun 2019 Quiz 2: Wind Power Adeol Summanleknl Name: Student ID: 1. You have a wind site with average wind speed of 8.2 m/s over 1 year, how the average power density in the wind is calculated, given density of the wind as 1.225 kg/m3? a. (1.225) (8.23) -338 W/m2 b. The estimated value closest to the actual average power density is calculated knowing the wind speed frequency distribution fi for each wind speed vi measured...
The mean work week for engineers in start-up companies is claimed to be about 64 hours with a standard deviation of...
The mean work week for engineers in start-up companies is claimed to be about 64 hours with a standard deviation of 6 hours. Kara, a newly hired engineer hopes that it's not (she wants it to be shorter). She asks 10 engineers in start-ups for the lengths of their mean work weeks. Their responses are 70,45,55; 60; 65:55:55: 60, 50, 55. a. Is the newly hired engineer testing a mean or a proportion? proportion mean b. The null hypothesis (or...
At wind speeds above 1000 centimeters per second (cm/sec), significant sand-moving events begin to occur. Wind...
At wind speeds above 1000 centimeters per second (cm/sec), significant sand-moving events begin to occur. Wind speeds below 1000 cm/sec deposit sand and wind speeds above 1000 cm/sec move sand to new locations. The cyclic nature of wind and moving sand determines the shape and location of large dunes. At a test site, the prevailing direction of the wind did not change noticeably. However, the velocity did change. Sixty-three wind speed readings gave an average velocity of x = 1075...
Question 2: Consider the two designs of a 2-input AND gate shown below. Give an intuitive argument about which will be faster. Back up your argument with calculations of path effort, delay and in...
Question 2: Consider the two designs of a 2-input AND gate shown below. Give an intuitive argument about which will be faster. Back up your argument with calculations of path effort, delay and input capacitances x and y to achieve this delay. 6C 6C
Question 2: Consider the two designs of a 2-input AND gate shown below. Give an intuitive argument about which will be faster. Back up your argument with calculations of path effort, delay and input capacitances x...
(LO5) In the following turbine designs, which two (2) are not used in hydroelectricy generation? a. Turgo turbine b. Francis turbine c. Gas turbine d. Kaplan turbine e. Pelton turbine f. Steam turbine
(LO5) In the following turbine designs, which two (2) are not used in hydroelectricy generation? a. Turgo turbine b. Francis turbine c. Gas turbine d. Kaplan turbine e. Pelton turbine f. Steam turbine
please explain
It is claimed by wind-playing orchestral/band musicians that as their instruments warm up the pitch (frequency) of the notes played by the instrument goes up by a noticeable amount. (That is one of the reasons why wind players warm up before they perform.) Evaluate this claim. If it is reasonable, why? If it is not reasonable, why not? Explain your reasoning using your physics knowledge. If you are at a loss as to how to start thinking about...
A condition monitoring technique for wind turbine blades is used to detect faults, but is not perfect. It has a sensitivity of 97% (proportion of faulty blades correctly identified) and a specificity of 99% (proportion of blades without faults correctly identified), when used as part of routine maintenance. Assume that 1% of the blades have faults. (a) What proportion of blades tested will receive a negative result, i.e. claiming that they are without faults? In your working, define relevant events....
The mean work week for engineers in start-up companies is claimed to be about 58 hours with a standard deviation of 8 hours. Kara, a newly hired engineer hopes that it's not (she wants it to be shorter). She asks 10 engineers in start-ups for the lengths of their mean work weeks. Their responses are 70; 45; 55; 60; 65; 55; 55; 60; 50; 55. a. Is the newly hired engineer testing a mean or a proportio... O proportion O...
MIET 2480-Renewable Energy Systems-15 Jun 2019 Quiz 2: Wind Power Adeol Summanleknl Name: Student ID: 1. You have a wind site with average wind speed of 8.2 m/s over 1 year, how the average power density in the wind is calculated, given density of the wind as 1.225 kg/m3? a. (1.225) (8.23) -338 W/m2 b. The estimated value closest to the actual average power density is calculated knowing the wind speed frequency distribution fi for each wind speed vi measured...
The mean work week for engineers in start-up companies is claimed to be about 64 hours with a standard deviation of 6 hours. Kara, a newly hired engineer hopes that it's not (she wants it to be shorter). She asks 10 engineers in start-ups for the lengths of their mean work weeks. Their responses are 70,45,55; 60; 65:55:55: 60, 50, 55. a. Is the newly hired engineer testing a mean or a proportion? proportion mean b. The null hypothesis (or...
Question 2: Consider the two designs of a 2-input AND gate shown below. Give an intuitive argument about which will be faster. Back up your argument with calculations of path effort, delay and input capacitances x and y to achieve this delay. 6C 6C
Question 2: Consider the two designs of a 2-input AND gate shown below. Give an intuitive argument about which will be faster. Back up your argument with calculations of path effort, delay and input capacitances x...
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