A la base de un rociador giratorio para césped entra agua estable con un caudal 235 Lt/min. Como se muestra en la Figura, el área de la sección transversal de salida de cada una de las boquillas es 1.2 cm2. El flujo que sale de cada boquilla es tangencial con un ángulo de inclinación de 30°. El radio 6 en cm desde el eje de rotación hasta la línea central de cada boquilla. Determine velocidad angular de rotación de la rociadora si no se aplica ningún torque de resistencia en RPM.

When using the ohmmeter function of a digital multimeter, the leads are placed in what position relative to the component being tested? a. parallel b. control c. series d. line

Air is to be cooled in the evaporator section of a refrigerator by passing it over a bank of 0.8-cm-outer-diameter and 0.4-m-long tubes inside which the refrigerant is evaporating at -20°c. air approaches the tube bank in the normal direction at 0°c and 1 atm with a mean velocity of 4 m/s. the tubes are arranged in-line with longitudinal and transverse pitches of sl- st 1.5 cm. there are 30 rows in the flow direction with 15 tubes in each row. determine (a) the refrigeration capacity of this system and (b) pressure drop across the tube bank. evaluate the air properties at an assumed mean temperature of -5°c and 1 atm. is this a good assumption?

Aplate clutch has a single pair of mating friction surfaces 250-mm od by 175-mm id. the mean value of the coefficient of friction is 0.30, and the actuating force is 4 kn. a) find the maximum pressure and the torque capacity using the uniform-wear model. b) find the maximum pressure and the torque capacity using the uniform-pressure model.