![subject](/tpl/images/cats/User.png)
Engineering, 22.09.2020 15:01 zitterkoph
At a point in an elastic material, there are two mutually perpendicular planes, one of which carries a direct tensile stress of 50N/mm^2 and a shear stress of 40N/mm^2, while the other plane is subjected to a direct compressive stress of 35N/mm^2 and a complementary shear stress of 40N/mm^2.
Required:
Determine the principal stresses at the point, the position of the planes on which they act, and the position of the planes on which there is no normal stress.
![ansver](/tpl/images/cats/User.png)
Answers: 2
Another question on Engineering
![question](/tpl/images/cats/User.png)
Engineering, 04.07.2019 18:10
Abrake has a normal braking torque of 2.8 kip in and heat-dissipating cast-iron surfaces whose mass is 40 lbm. suppose a load is brought to rest in 8.0 s from an initial angular speed of 1600 rev/min using the normal braking torque; estimate the temperature rise of the heat dissipating surfaces.
Answers: 3
![question](/tpl/images/cats/User.png)
Engineering, 04.07.2019 18:10
Fluids at rest possess no flow energy. a)- true b)- false
Answers: 3
![question](/tpl/images/cats/User.png)
Engineering, 04.07.2019 18:10
Compute the pressure drop of 30°c air flowing with a mean velocity of 8 m/s in a circular sheet-metal duct 300 mm in diameter and 15 m long. use a friction factor, f 0.02, and pair = 1.1644 kg/m a. 37.26 pa b. 25.27 pa n c. 29.34 pa d. 30.52 pa
Answers: 1
![question](/tpl/images/cats/User.png)
Engineering, 04.07.2019 18:20
A3-mm-thick panel of aluminum alloy (k 177 w/m-k, c 875 j/kg-k and ? = 2770 kg/m) is finished on both sides with an epoxy coating that must be cured at or above t,-150°c for at least 5 min. the production line for the curing operation involves two steps: (1) heating in a large oven with air at ts,0-175°c and a convection coefficient of h, 40 w/m2. k, and (2) cooling in a large chamber with air at 25°c and a con- vection coefficient of he 10 w/m2.k. the heating portion of the process is conducted over a time interval te which exceeds the ime required to reach 150°c by 5 min (h = r + 300 s). the coating has an emissivity of ? = 0.8, and the temperatures of the oven and chamber walls are 175 and 25°c, respectively. if the panel is placed in the oven at an initial temperature of 25°c and removed from the chamber at a safe-to-touch tempera ture of 37°c, what is the total elapsed time for the two-step curing operation?
Answers: 3
You know the right answer?
At a point in an elastic material, there are two mutually perpendicular planes, one of which carries...
Questions
![question](/tpl/images/cats/en.png)
English, 17.11.2020 03:20
![question](/tpl/images/cats/istoriya.png)
History, 17.11.2020 03:20
![question](/tpl/images/cats/istoriya.png)
History, 17.11.2020 03:20
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/biologiya.png)
![question](/tpl/images/cats/es.png)
Spanish, 17.11.2020 03:30
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 17.11.2020 03:30
![question](/tpl/images/cats/mat.png)
Mathematics, 17.11.2020 03:30
![question](/tpl/images/cats/biologiya.png)
Biology, 17.11.2020 03:30
![question](/tpl/images/cats/ekonomika.png)
![question](/tpl/images/cats/fizika.png)
Physics, 17.11.2020 03:30
![question](/tpl/images/cats/mat.png)
Mathematics, 17.11.2020 03:30
![question](/tpl/images/cats/mat.png)
Mathematics, 17.11.2020 03:30
![question](/tpl/images/cats/mat.png)
Mathematics, 17.11.2020 03:30
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/himiya.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 17.11.2020 03:30