The efficiency<span> of a heat engine can be calculated as the ratio of the work obtained to the heat energy put in at the high temperature,
efficiency = Work_max/T</span>high<span>.
or
efficiency=TH-TL/TH,
where TH is the high temperature and TL is the low temperature.</span><span>
In our case the heat engine operates between 600K and 800K. SO, TH=800K and TL=600K.
The efficiency is: e=800-600/800=200/800=0,25</span>
I know the answer,I just learned this,U measure it by hertz
Permeability is the condition of
being capable of having materials flow into and out of a membrane. The
permeability of a cell membrane is determined by how easily a molecule can diffuse across the membrane. Usually,
only molecules that are fat-soluble can permeate across a cell membrane. This
is because the layer that is exposed on the linings of the cell membrane is
nonpolar and can therefore allow the fat-soluble molecule to pass through.