Answer:
(C) passive state.
Explanation:
The earth pressure is the pressure exerted by the soil on the shoring system. They are three types of earth pressure which are:
a) Rest state: In this state, the retaining wall is stationary, this makes the lateral stress to be zero.
b) Active state: In this state, the wall moves away from the back fill, this leads to an internal resistance. Hence the active earth pressure is less than earth pressure at rest
c) Passive state: In this state the wall is pushed towards the back fill, this leads to shearing resistance. Hence, the passive earth pressure is greater than earth pressure at rest
Answer:21.3%
Explanation:
Given
80 % reduction in tool life
According to Taylor's tool life
=c
where V is cutting velocity
T=tool life of tool
80 % tool life reduction i.e. New tool Life is 0.2T
Thus
![VT^{0.12}=V'\left ( 0.2T\right )^{0.12}](https://tex.z-dn.net/?f=VT%5E%7B0.12%7D%3DV%27%5Cleft%20%28%200.2T%5Cright%20%29%5E%7B0.12%7D)
![V'=\frac{V}{0.2^{0.12}}](https://tex.z-dn.net/?f=V%27%3D%5Cfrac%7BV%7D%7B0.2%5E%7B0.12%7D%7D)
=1.213V
Thus a change of 21.3 %(increment) is required to reduce tool life by 80%
The creative process that helps you overcome writer's block is called Reset.
<h3>How do you overcome writer's block?</h3>
- Methods to Overcome Writer's Block
- Improve Your Workspace.
- Utilize the Pomodoro Technique.
- Schedule a Time and Make a Pattern.
- Try a Writing Prompt.
- It's OK to Be Flawed.
Thus, could be the answer.
To learn more about the creative process click here:
brainly.com/question/19249364
#SPJ1
Answer a) roof equilibrium temperature is 400K
Explanation:
The roof surface is sorrounded by ambient air whose temperature is 300K and which has a convective coefficient h of 10W/m2-K.
This means that heat will be conducted to the roof from the air around at an heat Flux of 300K x 10W/m2-K = 3000w/m2
For a clear solar day with solar heat Flux of 500W/m2, total heat Flux on roof will be
Q = 500 + 3500 = 3500W/m2
Q = h(Tr-Ta)
Ts is temperature of roof,
Ta is temperature of air
3500 = 10(Tr - 50)
350 = Tr - 50
Tr = 400k
Answer b): roof equilibrium temperature will be 350K
Explanation:
At night total heat Flux is only due to hot ambient air sorrounding the surface of the roof.
Q = 3000W/m2
Q = h(Tr-Ta)
3000 = 10(Tr-50)
300 = Tr - 50
Tr = 350K
Complete Question:
Problem 8 Determine the horsepower required to compress 1 lbm/min of ethylene oxide from 70 °F and 1 atm to 250 psia. The compressor has an efficiency of 75%. The molar heat capacity of ethylene oxide is given by
C_p=10.03+0.0184T C_p[=]Btu/lbmole- "F ; T[=] °F C,
Answer:
![P'=0.377hp](https://tex.z-dn.net/?f=P%27%3D0.377hp)
Explanation:
From the question we are told that:
Initial Temperature T_1=70 F
Final Temperature ![T_2=250pisa =114.94F](https://tex.z-dn.net/?f=T_2%3D250pisa%20%3D114.94F)
Efficiency ![E=75\%=0.75](https://tex.z-dn.net/?f=E%3D75%5C%25%3D0.75)
Generally the equation for Work-done is mathematically given by
![W=\int C_pT](https://tex.z-dn.net/?f=W%3D%5Cint%20C_pT)
![W=10.03(114.94-70 )+0.0184((114.94)^2-70^2 )](https://tex.z-dn.net/?f=W%3D10.03%28114.94-70%20%29%2B0.0184%28%28114.94%29%5E2-70%5E2%20%29)
![W=527.21btu/ibmole](https://tex.z-dn.net/?f=W%3D527.21btu%2Fibmole)
![W=11.982btu/ibm](https://tex.z-dn.net/?f=W%3D11.982btu%2Fibm)
Generally the equation for Efficiency is mathematically given by
![E=\frac{isotropic Power}{Actual P'}](https://tex.z-dn.net/?f=E%3D%5Cfrac%7Bisotropic%20Power%7D%7BActual%20P%27%7D)
![E=\frac{P}{P'}](https://tex.z-dn.net/?f=E%3D%5Cfrac%7BP%7D%7BP%27%7D)
Since
Isotropic Power
![P=0.0167*11.982btu/ibm](https://tex.z-dn.net/?f=P%3D0.0167%2A11.982btu%2Fibm)
![P=0.2btu/s](https://tex.z-dn.net/?f=P%3D0.2btu%2Fs)
Therefore
![P'=\frac{0.2}{0.75}](https://tex.z-dn.net/?f=P%27%3D%5Cfrac%7B0.2%7D%7B0.75%7D)
![P'=0266btu/s](https://tex.z-dn.net/?f=P%27%3D0266btu%2Fs)
Since
![1btu/s=1.4148hp](https://tex.z-dn.net/?f=1btu%2Fs%3D1.4148hp)
Therefore
![P'=0.377hp](https://tex.z-dn.net/?f=P%27%3D0.377hp)