Answer:
b) making the language clear
Explanation:
Mid-wing configuration places wings exactly at midline of airplane which means at half of height of fuselage. These airplanes are well balanced and also they have a large control surface area.It is the best option aerodynamically as these planes are streamlined much more and also has low interference drag as compared to the high and the low wing configurations.
The mid-wing has almost neutral roll stability that is further good from prespective of the combat as well as the aerobatic aircraft as mid-wing allows for performance of the rapid roll maneuvers with the minimum yaw coupling.
Answer:
![(\frac{r_1}{r_2})^2=\frac{1}{9}](https://tex.z-dn.net/?f=%28%5Cfrac%7Br_1%7D%7Br_2%7D%29%5E2%3D%5Cfrac%7B1%7D%7B9%7D)
Explanation:
From the question we are told that:
Diameter 1 ![d_1=1.0](https://tex.z-dn.net/?f=d_1%3D1.0)
Diameter 2 ![d_2=3.0](https://tex.z-dn.net/?f=d_2%3D3.0)
Generally the equation for Radius is mathematically given by
At Diameter 1
![r_{1}=\frac{1}{2} inch](https://tex.z-dn.net/?f=r_%7B1%7D%3D%5Cfrac%7B1%7D%7B2%7D%20inch)
At Diameter 2
![r_{2}=\frac{3}{2} inch](https://tex.z-dn.net/?f=r_%7B2%7D%3D%5Cfrac%7B3%7D%7B2%7D%20inch)
Generally the equation for continuity is mathematically given by
![A_1V_1=A_2V_2](https://tex.z-dn.net/?f=A_1V_1%3DA_2V_2)
Therefore
![(\frac{r_1}{r_2})^2=(\frac{1/2}{3/2})^2](https://tex.z-dn.net/?f=%28%5Cfrac%7Br_1%7D%7Br_2%7D%29%5E2%3D%28%5Cfrac%7B1%2F2%7D%7B3%2F2%7D%29%5E2)
![(\frac{r_1}{r_2})^2=\frac{1}{9}](https://tex.z-dn.net/?f=%28%5Cfrac%7Br_1%7D%7Br_2%7D%29%5E2%3D%5Cfrac%7B1%7D%7B9%7D)
Answer:
(d) all of the above
Explanation:
before cutting the screw threads the operator should lubricate all of the machine parts given in the option that is lead screw and gearbox , the ways and the cross slide and the carriage and half-nuts. we should use lubrication because it reduces the overall system friction and if friction is reduced then heat generated due to friction is also decreases which is beneficial
so option (D) will be correct because we need lubricate in all the given parts