Consider a slab of face area a and thickness l. suppose that l = 33 cm, a = 55 cm2, and the material is copper. if the faces of the slab are maintained at temperatures th = 129°c and tc = 21°c, and a steady state is reached, find the conduction rate through the slab. the thermal conductivity of copper is 401 w/m·k.

721.8 Joule per second

Explanation:

L = 33 cm = 0.33 m

A = 55 cm^2 = 0.0055 m^2

Th = 129°C

Tc = 21°C

k = 401 W/mK

The rate of flow of heat is given by the formula

H = 721.8 Joule per second

Thus, the rate of flow of heat is given by 721.8 Joule per second.

answer;

d. are made mostly of liquid

explanation;

-the general   composition and structure planets includes; they have a thick gas and liquid layer covering a small,solid core. mostly the gases are hydrogen and helium atmosphere and layers of liquid hydrogen. for instance neptune and uranus are examples of the outer planets, they have a core covered by ice and ammonia.

-neptune's atmosphere is hydrogen and helium with a bit of methane so there is no oxygen to breath and the interior is made up of frozen water and ammonia with a rock and iron core. thus, there is no liquid water or solid surface to survive.