A crane lifts a 500 kg beam vertically upward 21 m, then swings it eastward 18 mHow much work does the crane do? Neglect friction and assume the beam moves with constant speed.
there isn't a lot area among the brick and the plaster wallYou have the usual lathe and laster? I dont see any approach of placing insullation in thereBUT a a hundred and fifty y/o brick condo is cool in the summertime and hot within the wintry weather all through it self-they fairly developed residences thenThe handiest factor i could do if it hasnt been performed already is to have well home windows installed.
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When we Neglect friction and assume the beam moves with constant speed, we simply consider only the change of potential energy, which is: mgh (500 kg)(9.8m/s^2)(21 m) 102.9 kJ
If the walls are open, paper-backed insulation is the bestBlown-in insulation for attics is easy and fastMany times, old brick houses only had furring strips (boards) on the brick, then walls were added to that, like metal sheath with plasterThat was before the days of drywallBrick holds heat.and coldSo, if the wall gets cold from the outside, it will feel cold on the insideIf the sun beats on it and it gets warm, the heat radiates to the interior of the house.
