Para descargar granos de la bodega de un barco se emplea un elevador que levanta el grano a una distancia de 12 m. la descarga del grano se realiza por la parte superior del elevador a razón de 2.0 kg cada segundo y la velocidad de descarga de cada partícula de grano es de 3.0 m/s. encuentre la potencia mínima (en hp) del motor que puede elevar los granos de este modo.

Heat is added to a piston-cylinder device filled with 2 kg of air to raise its temperature 400 c from an initial temperature of t1 27 cand pressure of pi 1 mpa. the process is isobaric process. find a)-the final pressure p2 b)-the heat transfer to the air.

What precautions should you take to prevent injuries when dealing with heavy loads?

Consider a large isothermal enclosure that is maintained at a uniform temperature of 2000 k. calculate the emissive power of the radiation that emerges from a small aperture on the enclosure surface. what is the wavelength ? , below which 10% of the emission is concentrated? what is the wavelength ? 2 above which 10% of the emission is concentrated? determine the wavelength at which maximum spectral emissive power occurs. what is the irradiation incident on a small object placed inside the enclosure?