4. Un avión pequeño y que viaja con rapidez constante, tiene una masa m = 1675 kg. Esto incluye la carga. El área combinada de ambas alas es de 20.5 m². Determine la rapidez del viento por
encima del ala si la rapidez del viento por debajo del ala es de 147 m/s. La densidad del aire es
de 1.29 kg/m

Agymnast dismounts off the uneven bars in a tuck position with a radius of 0.3m (assume she is a solid sphere) and an angular velocity of 2rev/s. during the dismount she stretches out into the straight position, with a length of 1.5m, (assume she is a uniform rod through the center) for her landing. the gymnast has a mass of 50kg. what is her angular velocity in the straight position?

True or false when elements combine to form a mixture, the resulting chemical properties may be very different from those of the elements that make it.

Air is to be preheated by hot exhaust gases in a cross-flow heat exchanger before it enters the furnace. air enters the heat exchanger at 95 kpa and 20°c at a rate of 0.6 m^3/s. the combustion gases (cp = 1.10 kj/kg°c) enter at 160°c at a rate of 0.95 kg/s and leave at 95°c. determine the rate of heat transfer to the air and its outlet temperature.