A urethane elastomer is selected as an artificial heart valve material. You wish to calculate the...

A urethane elastomer is selected as an artificial heart valve material. You wish to calculate the maximum theoretical strain (strain endurance limit) the material can withstand forever. This material has a threshold fracture resistance of 50 J/m^2 based upon its crosslink density, its intrinsic flaw size is 50 micron, and its tensile modulus is 1 MPa.

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samet mamat answered 2 years ago

Valve stenosis (“narrowing”) is a disorder characterised by stiffening of the heart valve flaps. It can...

Valve stenosis (“narrowing”) is a disorder characterised by stiffening of the heart valve flaps. It can occur as a congenital defect, a consequence of prolonged calcium ion imbalance, or an infection. Patients experiencing valve stenosis often have obstructed blood flow that requires surgical intervention. Think about how the blood flow would be disrupted as it passes each of the heart valves if they were stiff. What happens to the heart over all?

Heart murmurs caused by a stenotic mitral valve ______?. are heard as a high pitched click...

Heart murmurs caused by a stenotic mitral valve ______?. are heard as a high pitched click when the valve should be—but is not—wide open during systole. are detected due to the turbulent blood flow that occurs as blood backflows into the left atrium are detected if the valve's cusps are thin and flexible All of the listed responses are true.

Describe movement of each heart valve caused by change in direction of flow of blood. What...

Describe movement of each heart valve caused by change in direction of flow of blood. What valves are open/closed during contraction and relaxation etc.

(A). Calculate the target-variance of the data below if you wish the data to have a...

(A). Calculate the target-variance of the data below if you wish the data to have a return of 60%.[12marks] Day !st june 2nd june 3rd june 4th june 5th june 6th june RETURN(%) -110 40 12 60 150 -84 (B). Discus why investors are concerned about downside risk? What parameter can be used to asses downside risk?[8marks

The company you work for provides you with 20 random wish bone samples to calculate the...

The company you work for provides you with 20 random wish bone samples to calculate the yield strength of a material used in your production proccess. The data calculated is provided below. The steel you recieve is reported to have a mean of 420 with a standard deviation of 5 MPa. yield_strength = c(444,435,465,423,425,470,417,418,410,399,425,423,459,465,420,423,417,404,420,451) a Can you run a HT with this data? Why? b Assuming you can, calculate the standard error and margin of error with an alpha level...

Calculate the target-variance of the data below if you wish the data to have a return...

Calculate the target-variance of the data below if you wish the data to have a return of 60% Discuss why investors are concerned about downside risk? What parameter can be used to assess downside risk? Day 1st June 2nd June 3rd June 4th June 5thJune 6thJune Return (%) -110 40 120 60 150 -80

Instructions:: In this assignment,you will calculate confidence intervals for the quantitative variables in the Heart Rate...

Instructions:: In this assignment,you will calculate confidence intervals for the quantitative variables in the Heart Rate database. Steps: 1. Open the Heart Rate database in Excel and identify the quantitative variables 2. Make sure the data is sorted by category, e.g., male at-rest, female at-rest, etc. 3. Use the Data Analysis tools to construct 95% and 99% confidence intervals for all of the sorted quantitative variables. Please note that the statistic being used is the confidence interval of the means,...

Let P(A)= event that the card selected is a heart, P(B)= event that the card selected...

Let P(A)= event that the card selected is a heart, P(B)= event that the card selected is a club, P(C)= event that the card selected is spade, P(D)= event that the card selected is a diamond, P(E)= even that the card selected is a face card. Find P(A), P(B or D), P(selecting an ace), P(selecting an even digit card or E), P(selecting a red card) P(King of hearts) Create a probability statement and find the theoretical probability.

Suppose we wish to estimate the mean heart rate, using a 95% confidence interval, for a...

Suppose we wish to estimate the mean heart rate, using a 95% confidence interval, for a par- ticular population. We observe 130 individuals to see a sample mean of 98.249 and a sample standard deviation of 0.733. We then find the tc-value, corresponding to the value on the t-distribution (d.f. = 130) so that the area to the left of it is equal to 95%, which ends up being: tc ≈ 1.656659. Next we compute the error and obtain our...

13. Using the Heart Rate Reserve Method, calculate the target heart rate zone for the Tom:...

13. Using the Heart Rate Reserve Method, calculate the target heart rate zone for the Tom: Tom: Age 20; Resting Heart Rate 60; Desired Target Heart Rate Zone: 70% to 85% of Maximum Heart Rate Show your calculations to earn full credit. Tom’s Maximum heart rate: (1pts) Show Calculation Tom’s Heart Rate Reserve (Working Heart Rate): Show calculation (1pts) Desired Target heart rate range: Show all calculations for full credit. Low range 70% = _____ bpm (beats per minute)(2pts)...

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