Suppose 150w of heat flows by conduction from the blood capillaries beneath the skin to the body's surface area of 1.5 m^2. if the temperature difference is 0.50 ºc, estimate the average distance of capillaries below the skin surface. use 'mm' as your units.

Explanation:

Given:

Rate of heat transfer, P = 150 W

Body surface Area, A = 1.5 m²

Temperature difference, ΔT = 0.50°C

Also,

The rate of heat transfer, P is given as:

Where,

l =length of material (or here it isaverage distance of the capillaries below the skin surface)

k = Thermal conductivity

Here the transfer of heat is through the skin. Thus, k for human tissue is given as 0.2

substituting the values in the above equation, we get

or

or

where is the circuit diagram ?

the skeletons of most mammals reach a certain size and then stop growing. however, many animals, including some mammals, keep growing throughout their lives. kangaroos, for example, just keep growing and growing until they die. also, the longer an animal lives the greater the chance it might catch some deadly disease.