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David aims to create self-sufficient and environmentally friendly projects What kind of architecture aims to build self-sufficient and
environmentally friendly spaces?
architecture aims to build self-sufficient and environmentally friendly spaces.
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An electrical motor raises a 50kg load at a construct velencity .calculate the power of the motor, if it takes 40sec to raise the load through a height of 24m(take g =9.8n/g)

What is the heat treatment of metals? what is the benefit of it? why and how it's useful? answer in details, do not write by hand.

Air flows over a heated plate àt a velocity of 50m/s. the local skin factor coefficient at a point on a plate is 0.004. estimate the local heat transfer coefficient at this point.the following property data for air are given: density = 0.88kg/m3 , viscosity 2.286 x 10 ^-5 kgm/s , k = 0.035w/mk ,cp = 1.001kj/kgk. use colburn reynolds analogy.