Answer:
Answered
Explanation:
A separated flow is a characteristic of a flow-field over a __Stalled__ airfoil. Stall is the reduction in lift coefficient generated by a foil as angle of attack increases.
The critical angle of attack is typically about 15 degrees, but it may vary significantly depending on the fluid, foil, and Reynolds number.The boundary layer will tend to separate from the top surface and a large wake is formed downstream.
<em>gravity</em><em> </em><em>means</em><em> </em><em>that</em><em> </em><em>is</em><em> </em><em>no</em><em>t</em><em> a</em><em> </em><em>force</em><em> </em><em>but</em><em> </em><em>the</em><em> </em><em>gravitatio</em><em>nal</em><em> force</em><em> </em><em>is</em><em> </em><em>a</em><em> </em><em>force</em><em> </em>
<em>For</em><em> </em><em>example</em><em> </em><em>we </em><em>call</em><em> </em><em>the</em><em> </em><em>eart</em><em>h</em><em> </em><em>has</em><em> </em><em>a</em><em> </em><em>gravi</em><em>tational</em><em> force</em><em> </em><em>but</em><em> </em><em>on</em><em> </em><em>moon</em><em> </em><em>we</em><em> </em><em>say</em><em> </em><em>that</em><em> </em><em>it</em><em> </em><em>do</em><em>esn't</em><em> </em><em>have</em><em> </em><em>grav</em><em>ity</em>
Energy cannot be created or destroyed only changed or transferred into one form or another
Answer: b
. Natural selection is a process that brings about evolution
Explanation:
The natural selection can be defined as the differential survival and reproduction of the organisms that have better phenotypic traits which allow them to survive in their changing environment. These traits are passed on to the next generation this process is necessary for the evolution of the species. The evolution is the change in the structure and function of the organisms with the passage of them.
