Answer:
1. Location of enemy ground troops - EARTH OBSERVING.
Using earth observing satellite imagery, the military can observe vast expanses of land and in so doing, find the location of enemy ground troops.
2. Routine reconnaissance of an unfamiliar climate - WEATHER
In other to find out more about the climate of an area, a weather satellite can be used to observe the areas and its changing weather patterns.
3. Analyze waterways in an unfamiliar location - NAVIGATION
Using navigation satellites, navigation conduits such as roads and waterways can be observed.
4. Provide warning of an attack - COMMUNICATION.
Communications satellites enable people to communicate over great distances and so can be used by the military to warn of an impending attack.
Q:What velocity does the boy attain if he throws the bricks one at a time?
Answer:Linear velocity since it moves back and firth and does not rotate like angular velocity.
Based on the information, both technician A and technician B are correct.
<h3>How to depict the information?</h3>
From the information given, Technician A says that mechanical shifting controls can wear out over time.
Technician B says that vacuum control rubber diaphragms can deteriorate over time.
In this case, both technicians are correct as the information depicted is true.
Learn more about technicians on:
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Answer:
Explanation:
Using the proper technique is incredibly important because it prevents the materials being joined from breaking and/or causing an accident. If the wrong joining technique is used the materials may not hold in place and come apart easily instead. Also, some joining techniques are not meant for some materials and may instead cause the material to become weak and brittle causing it to break apart almost immediately.
Answer:
Part a: The yield moment is 400 k.in.
Part b: The strain is ![8.621 \times 10^{-4} in/in](https://tex.z-dn.net/?f=8.621%20%5Ctimes%2010%5E%7B-4%7D%20in%2Fin)
Part c: The plastic moment is 600 ksi.
Explanation:
Part a:
As per bending equation
![\frac{M}{I}=\frac{F}{y}](https://tex.z-dn.net/?f=%5Cfrac%7BM%7D%7BI%7D%3D%5Cfrac%7BF%7D%7By%7D)
Here
- M is the moment which is to be calculated
- I is the moment of inertia given as
![I=\frac{bd^3}{12}](https://tex.z-dn.net/?f=I%3D%5Cfrac%7Bbd%5E3%7D%7B12%7D)
Here
- b is the breath given as 0.75"
- d is the depth which is given as 8"
![I=\frac{bd^3}{12}\\I=\frac{0.75\times 8^3}{12}\\I=32 in^4](https://tex.z-dn.net/?f=I%3D%5Cfrac%7Bbd%5E3%7D%7B12%7D%5C%5CI%3D%5Cfrac%7B0.75%5Ctimes%208%5E3%7D%7B12%7D%5C%5CI%3D32%20in%5E4)
![y=\frac{d}{2}\\y=\frac{8}{2}\\y=4"\\](https://tex.z-dn.net/?f=y%3D%5Cfrac%7Bd%7D%7B2%7D%5C%5Cy%3D%5Cfrac%7B8%7D%7B2%7D%5C%5Cy%3D4%22%5C%5C)
![\frac{M_y}{I}=\frac{F_y}{y}\\M_y=\frac{F_y}{y}{I}\\M_y=\frac{50}{4}{32}\\M_y=400 k. in](https://tex.z-dn.net/?f=%5Cfrac%7BM_y%7D%7BI%7D%3D%5Cfrac%7BF_y%7D%7By%7D%5C%5CM_y%3D%5Cfrac%7BF_y%7D%7By%7D%7BI%7D%5C%5CM_y%3D%5Cfrac%7B50%7D%7B4%7D%7B32%7D%5C%5CM_y%3D400%20k.%20in)
The yield moment is 400 k.in.
Part b:
The strain is given as
![Strain=\frac{Stress}{Elastic Modulus}](https://tex.z-dn.net/?f=Strain%3D%5Cfrac%7BStress%7D%7BElastic%20Modulus%7D)
The stress at the station 2" down from the top is estimated by ratio of triangles as
![F_{2"}=\frac{F_y}{y}\times 2"\\F_{2"}=\frac{50 ksi}{4"}\times 2"\\F_{2"}=25 ksi](https://tex.z-dn.net/?f=F_%7B2%22%7D%3D%5Cfrac%7BF_y%7D%7By%7D%5Ctimes%202%22%5C%5CF_%7B2%22%7D%3D%5Cfrac%7B50%20ksi%7D%7B4%22%7D%5Ctimes%202%22%5C%5CF_%7B2%22%7D%3D25%20ksi)
Now the steel has the elastic modulus of E=29000 ksi
![Strain=\frac{Stress}{Elastic Modulus}\\Strain=\frac{F_{2"}}{E}\\Strain=\frac{25}{29000}\\Strain=8.621 \times 10^{-4} in/in](https://tex.z-dn.net/?f=Strain%3D%5Cfrac%7BStress%7D%7BElastic%20Modulus%7D%5C%5CStrain%3D%5Cfrac%7BF_%7B2%22%7D%7D%7BE%7D%5C%5CStrain%3D%5Cfrac%7B25%7D%7B29000%7D%5C%5CStrain%3D8.621%20%5Ctimes%2010%5E%7B-4%7D%20in%2Fin)
So the strain is ![8.621 \times 10^{-4} in/in](https://tex.z-dn.net/?f=8.621%20%5Ctimes%2010%5E%7B-4%7D%20in%2Fin)
Part c:
For a rectangular shape the shape factor is given as 1.5.
Now the plastic moment is given as
![shape\, factor=\frac{Plastic\, Moment}{Yield\, Moment}\\{Plastic\, Moment}=shape\, factor\times {Yield\, Moment}\\{Plastic\, Moment}=1.5\times400 ksi\\{Plastic\, Moment}=600 ksi](https://tex.z-dn.net/?f=shape%5C%2C%20factor%3D%5Cfrac%7BPlastic%5C%2C%20Moment%7D%7BYield%5C%2C%20Moment%7D%5C%5C%7BPlastic%5C%2C%20Moment%7D%3Dshape%5C%2C%20factor%5Ctimes%20%7BYield%5C%2C%20Moment%7D%5C%5C%7BPlastic%5C%2C%20Moment%7D%3D1.5%5Ctimes400%20ksi%5C%5C%7BPlastic%5C%2C%20Moment%7D%3D600%20ksi)
The plastic moment is 600 ksi.