Air streams pass a small airplane's wings ; speed over the top surface 50m/s and 30m/s pass on he bottom, plane's ma

ss 600kg ,wing area 9m square. Calculate the net upwards force on the plane.

Which of the following is the main energy source for the sun? a. fission of hydrogen b. fusion of hydrogen c. fusion of helium d. fission of iron

Give an example in which the electrical energy changes to light energy

Arigid tank is divided into two equal parts by a partition. one part of the tank contains 3 kg of compressed liquid water at 400 kpa and 60°c while the other part is evacuated. the partition is now removed, and the water expands to fill the entire tank. determine the entropy change of water during this process, if the final pressure in the tank is 40 kpa. use steam tables.