SE DEBE CONTRUIR UNA PARED QUE TENDRA 4 METROS DE LARGO POR 3 METROS DE ALTO. SI SE UTILIZARAN LADRILLOS HUECOS Y TENIENDO EN CUENTA QUE ENTRE LADRILLO Y LADRILLO SE DEBE COLOCAR ALREDEDOR DE DOS CENTÍMETROS DE MEZCLA PARA UNIRLOS….. ¿ CUANTOS LADRILLOS SERAN NECESARIOS APROXIMADAMENTE PARA CONTRUIR LA PARED?.

Apipe with an outside diameter of 15 cm is exposed to an ambient air and surrounding temperature of -20°c. the pipe has an outer surface temperature of 65°c and an emissivity of 0.85. if the rate of heat loss from the pipe surface is 0.95 kw per meter of length, the external convective heat transfer coefficient (h) is: (a) 12.5 w/m"k (b) 18.6 w/mk (c) 23.7 w/mk (d) 27.9 w/mk (e) 33.5 w/mk

The higher the astm grain size number, the finer the gran is. a)-true b)-false

Which of the following refers to refers to how well the control system responds to sudden changes in the system. a)-transient regulation b)- distributed regulation c)-constant regulation d)-steady-state regulation