Question

A walrus transfers energy by conduction through its blubber at the rate of 150 W when immersed in −1.00ºC water. The walrus’s internal core temperature is 37.0ºC , and it has a surface area of 2.00 m^2. What is the average thickness of its blubber, which has the conductivity of fatty tissues without blood? (answer in cm)

Answer 1

Answer:

t=12.6 cm

Explanation:

Given that

Q= 150 W

T₁ =  −1.00ºC

T₂ = 37.0ºC

A= 2 m²

Lets take thermal conductivity of blubber

K= 0.25 W/(m.K)

Lets take thickness = t

We know that heat transfer due to conduction given as

$Q=KA\dfrac{(T_2-T_1)}{t}$

$t=KA\dfrac{(T_2-T_1)}{Q}$

$t=0.25\times 2\times \dfrac{(37 + 1)}{150}$

t=0.126 m

t= 12.6 cm

Therefore thickness of the blubber is 12.6 m.