Answer:well u can use to make a shelter but that's all I can think of ??
Explanation:
Overcurrent protective devices, or OCPDs
Answer:
1.Plant Grass and Shrubs. Grass and shrubs are very effective at stopping soil erosion. ...
2.Use Erosion Control Blankets to Add 3.Vegetation to Slopes. ...
4.Build Terraces. ...
5.Create Diversions to Help Drainage
Answer:
a) What is the surface temperature, in °C, after 400 s?
T (0,400 sec) = 800°C
b) Yes, the surface temperature is greater than the ignition temperature of oak (400°C) after 400 s
c) What is the temperature, in °C, 1 mm from the surface after 400 s?
T (1 mm, 400 sec) = 798.35°C
Explanation:
oak initial Temperature = 25°C = 298 K
oak exposed to gas of temp = 800°C = 1073 K
h = 20 W/m².K
From the book, Oak properties are e=545kg/m³ k=0.19w/m.k Cp=2385J/kg.k
Assume: Volume = 1 m³, and from energy balance the heat transfer is an unsteady state.
From energy balance: ![\frac{T - T_{\infty}}{T_i - T_{\infty}} = Exp (\frac{-hA}{evCp})t](https://tex.z-dn.net/?f=%5Cfrac%7BT%20-%20T_%7B%5Cinfty%7D%7D%7BT_i%20-%20T_%7B%5Cinfty%7D%7D%20%3D%20Exp%20%28%5Cfrac%7B-hA%7D%7BevCp%7D%29t)
Initial temperature wall = ![T_i](https://tex.z-dn.net/?f=T_i)
Surface temperature = T
Gas exposed temperature = ![T_{\infty}](https://tex.z-dn.net/?f=T_%7B%5Cinfty%7D)