A box with a total surface area of 1.88 m^2 and a wall thickness of 2.44 cm is made of an insulating material. A 14.1 W electric

Question

A box with a total surface area of 1.88 m^2
and
a wall thickness of 2.44 cm is made of an insulating material. A 14.1 W electric heater
inside the box maintains the inside temperature at 18.6
◦C above the outside temperature.
Find the thermal conductivity of the insulating material.
Answer in units of W/m ·
◦ C.

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Sapo 1 week 2021-07-22T14:33:00+00:00 1 Answers 0 views 0

Answers ( )

    0
    2021-07-22T14:34:22+00:00

    Answer:9.8×10^(-3) w/m°C

    Explanation:

    Quantity of heat(Q)=14.1w

    Distance(d)=2.44cm=2.44/100=0.0244m

    Area(a)=1.88m^2

    Temperature change(t)=18.6°C

    thermal conductivity(k)=?

    K=(Qxd) ➗ (a x t)

    K=(14.1×0.0244) ➗ (1.88×18.6)

    K=0.34404 ➗ 34.968

    K=9.8×10^(-3) w/m°C

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