![subject](/tpl/images/cats/User.png)
Engineering, 19.04.2021 15:50 ultimateapes
In a material processing experiment conducted aboard the space shuttle, a coated niobium sphere of 10 - mm diameter is removed from a furnace at 900°C and cooled to a temperature of 300°C. Although properties of the niobium vary over this temperature range, constant values may be assumed to a reasonable approximation, with rho = 8600 kg/m3, c = 290 J/kg middot K, and k = 63 W/m middot K.
![ansver](/tpl/images/cats/User.png)
Answers: 1
Another question on Engineering
![question](/tpl/images/cats/User.png)
Engineering, 04.07.2019 18:10
Aplate clutch has a single pair of mating friction surfaces 250-mm od by 175-mm id. the mean value of the coefficient of friction is 0.30, and the actuating force is 4 kn. a) find the maximum pressure and the torque capacity using the uniform-wear model. b) find the maximum pressure and the torque capacity using the uniform-pressure model.
Answers: 3
![question](/tpl/images/cats/User.png)
Engineering, 04.07.2019 18:10
Adouble-strand no. 60 roller chain is used to transmit power between a 13-tooth driving sprocket rotating at 300 rev/min and a 52-tooth driven sprocket. a) what is the allowable horsepower of this drive? b) estimate the center-to-center distance if the chain length is 82 pitches. c) estimate the torque and bending force on the driving shaft by the chain if the actual horsepower transmitted is 30 percent less than the corrected (allowable) power.
Answers: 3
![question](/tpl/images/cats/User.png)
Engineering, 04.07.2019 18:10
A-mn has a cubic structure with a0 0.8931 nm and a density of 7.47 g/cm3. b-mn has a different cubic structure, with a0 0.6326 nm and a density of 7.26 g/cm3. the atomic weight of manganese is 54.938 g/mol and the atomic radius is 0.112 nm. determine the percent volume change that would occur if a-mn transforms to b-mn.
Answers: 2
![question](/tpl/images/cats/User.png)
Engineering, 04.07.2019 18:20
Ahe-xe mixture containing a 0.75 mole fraction of helium is used for cooling electronics in an avionics application. at a temperature of 300 k and atmospheric pressure, calculate the mass fraction of helium and the mass density, molar concentration and molecular weight of the mixture. if the cooling capacity is 10 l, what is the mass of the coolant?
Answers: 3
You know the right answer?
In a material processing experiment conducted aboard the space shuttle, a coated niobium sphere of 1...
Questions
![question](/tpl/images/cats/mat.png)
Mathematics, 06.01.2021 21:40
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/health.png)
![question](/tpl/images/cats/himiya.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 06.01.2021 21:40
![question](/tpl/images/cats/ekonomika.png)
Business, 06.01.2021 21:40
![question](/tpl/images/cats/en.png)
English, 06.01.2021 21:40
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/health.png)
Health, 06.01.2021 21:40
![question](/tpl/images/cats/mat.png)
Mathematics, 06.01.2021 21:40
![question](/tpl/images/cats/mat.png)
Mathematics, 06.01.2021 21:40
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/fizika.png)
Physics, 06.01.2021 21:40
![question](/tpl/images/cats/mat.png)
Mathematics, 06.01.2021 21:40
![question](/tpl/images/cats/health.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 06.01.2021 21:40
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 06.01.2021 21:40