2.- En el interior de una recámara se mantiene a una temperatura de ( 25°C), y su exterior a (-3 °C). Calcula la cantidad de calor que se transmite del interior de la
recámara hacia el exterior a través del vidrio de una ventana de 3.20m de ancho
por 2.8m de altura y 12mm de espesor, durante un medio día.
Datos e incógnitas:
Fórmula:
Q= Atl(T2-T1)
1 = m
Q= AtX(T2-T1) L
D = m
r=m
+ T2-T1
MAL = 5.7 X 10-2 Kcalm seg °C
t=
6.16
A = Area de la sección transversal = área de un círculo
A=nr2 = (3.1416)
Sustitución
Q = (x10-m2)(18000seg)(5.7x10-2 Kcalm s °c)(°C)
m​

answer:   x = 3 + √11     and     x = 3 - √11

step-by-step explanation:

x² - 6x + 9 = 11

(x - 3)² = 11

x - 3 = ±√11

    x = 3 ± √11

x = 3 + √11     and     x = 3 - √11

step-by-step explanation:

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so the rectangle is 80cm (area)

now to find the area of a triangle.

base times height.

4 times 8.

your answer is 96cm.

hope this .