It seems you are looking for the (solucionario) for the book "Fundamentos de Transferencia de Momento, Calor y Masa" by James R. Welty, Charles E. Wicks, Gregory L. Rorrer, and Robert E. Wilson — specifically mentioning Chapter 47 and the year 2021 .
The specific document titled "" refers to the solutions manual for the 7th Edition It seems you are looking for the (solucionario)
: En su sitio oficial , ofrecen una versión de E-Text mejorada que permite mostrar/ocultar soluciones para problemas seleccionados de práctica estudiantil. Charles E. Wicks