Dos trufis contratados para ir a la iglesia de Santa Veracruz, parten de un mismo punto, uno de ellos logra llenarse primero y parte, y se mueve a razón de 30 Km/h, El segundo parte luego de 30 min, debido al retraso de algunos pasajeros, y se desplaza con una velocidad de 50Km/h, El segundo trufi logra alcanzar al primero justo en la Iglesia de Santa Veracruz. Si consideras que la carretera es recta y ambos trufis mantienen su velocidad constante. A qué distancia se encuentra la iglesia respecto al punto de partida? 9 points

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.

You can watch static electricity in action by rubbing an inflated balloon against your hair. your hair will actually stand on its end! it does this because each hair becomes charged, and they all repel one another.

Emmy kicks a soccer ball up at an angle of 45° over a level field. she watches the ball's trajectory and notices that it lands, two seconds after being kicked, about 20 m away to the north. assume that air resistance is negligible, and plot the horizontal and vertical components of the ball's velocity as a function of time. consider only the time that the ball is in the air, after being kicked but before landing. take "north" and "up" as the positive ‑ and ‑directions, respectively, and use ≈10 m/s2 for the downward acceleration due to gravity.