Engineering, 26.02.2020 01:20 keeks11
Consider a composite wall consisting of 1 cm of plywood (on the inside) and 11 cm brick (on the outside) separated by 10 cm of glass fiber blanket (of density 40 kg/m?). The interior of the wall is exposed to 21°C air with a convection coefficient of 20 W/m²K and the exterior of the wall is exposed to -10°C air with a convection coefficient of 50 W/m²K. The surface area of the wall is 300 m². a. Find the total thermal resistance, overall heat transfer coefficient, and heat transfer rate from the inside air to the outside air. b. If the convection coefficient of the outside air on a windy day was 250 W/m² instead, by what percentage would the heat transfer rate be different? c. Would you expect that radiation would significantly affect your calculations? Why or why not?
Answers: 1
Engineering, 04.07.2019 18:10, Candi9697
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
Engineering, 04.07.2019 18:20, 21megoplin
How much power could a wind turbine produce if it had the following specifications? cp = 0.45 -d=1.2kg/m3 d=50m v 5m/s
Answers: 2
Engineering, 06.07.2019 03:20, harleyandpope90
Aparticle moves along a straight line such that its acceleration is a=(4t^2-2) m/s, where t is in seconds. when t = 0, the particle is located 2 m to the left of the origin, and when t = 2, it is 20 m to the left of the origin. determine the position of the particle when t=4s.
Answers: 1
Consider a composite wall consisting of 1 cm of plywood (on the inside) and 11 cm brick (on the outs...
Mathematics, 20.03.2020 06:54
Mathematics, 20.03.2020 06:54