Answer:
Go to explaination for the details of the answer.
Explanation:
In order to determine the lifetime (75 years) chronic daily exposure for each individual, we have to first state the terms of our equation:
CDI = Chronic Daily Intake
C= Chemical concentration
CR= Contact Rate
EFD= Exposure Frequency and Distribution
BW= Body Weight
AT = Average Time.
Having names our variables lets create the equations that will be used to derive our answers.
Please kindly check attachment for details of the answer.
Answer:
There is 0.466 KW required to operate this air-conditioning system
Explanation:
<u>Step 1:</u> Data given
Heat transfer rate of the house = Ql = 755 kJ/min
House temperature = Th = 24°C = 24 +273 = 297 Kelvin
Outdoor temperature = To = 35 °C = 35 + 273 = 308 Kelvin
<u>Step 2: </u> Calculate the coefficient of performance o reversed carnot air-conditioner working between the specified temperature limits.
COPr,c = 1 / ((To/Th) - 1)
COPr,c = 1 /(( 308/297) - 1)
COPr,c = 1/ 0.037
COPr,c = 27
<u>Step 3:</u> The power input cna be given as followed:
Wnet,in = Ql / COPr,max
Wnet, in = 755 / 27
Wnet,in = 27.963 kJ/min
Win = 27.963 * 1 KW/60kJ/min = 0.466 KW
There is 0.466 KW required to operate this air-conditioning system
Answer:
![F=6200\ \text{N}\\](https://tex.z-dn.net/?f=F%3D6200%5C%20%5Ctext%7BN%7D%5C%5C)
Explanation:
In this problem you need to define the force that acts upon a beam in a 3 point bending problem. I put a picture of the problem taken from Wikipedia:
In this problem the flexural strength is defined with the following formula:
![\sigma=\cfrac{3FL}{2bd^2}](https://tex.z-dn.net/?f=%5Csigma%3D%5Ccfrac%7B3FL%7D%7B2bd%5E2%7D)
where F is the force applied, L the length between the two rods, b the width of the ceramic block and d it's height.
The force is then defined as:
![F=\cfrac{2\sigma bd^2}{3L}=6200\ \text{N}](https://tex.z-dn.net/?f=F%3D%5Ccfrac%7B2%5Csigma%20bd%5E2%7D%7B3L%7D%3D6200%5C%20%5Ctext%7BN%7D)