Physics
posted by Tim .
The amount of heat per second conducted from the blood capillaries beneath the skin to the surface is 250 J/s. The energy is transferred a distance of 1.7 x 103 m through a body whose surface area is 1.8 m2. Assuming that the thermal conductivity is that of body fat, determine the temperature difference between the capillaries and the surface of the skin.

Physics 
Elena
Q/t=q= k•A•ΔT/Δx
ΔT=q•Δx/k•A =
= 250•1.7•10⁻³/0.2•1.8=1.18 K
Respond to this Question
Similar Questions

Electricity  Plz Help!
By considering a wire of radius 'r', lenght 'l' and resistivity 'e' through which a current I flows, show that a) the rate of production of heat by it is I^2*P*l / pi*r^2 b) the rate of loss of heat from its surface is 2pi*r*t*h , … 
Physics
A person's body is covered with 1.4 m2 of wool clothing. The thickness of the wool is 1.3 103 m. The temperature at the outside surface of the wool is 14°C, and the skin temperature is 36°C. How much heat per second does the person … 
astrophysics
1) Every second the Sun outputs 3.90* 10^26 Joules of energy. Power is energy output per unit time and is given in units of Watts (W) where 1 W = 1 Joule per second. The Sun's power output is therefore 3.90*10^26 Watts. This is called … 
astrophysics
1) Every second the Sun outputs 3.90* 10^26 Joules of energy. Power is energy output per unit time and is given in units of Watts (W) where 1 W = 1 Joule per second. The Sun's power output is therefore 3.90*10^26 Watts. This is called … 
physics
The basal metabolic rate is the rate at which energy is produced in the body when a person is at rest. A 70.0 kg person of height 1.79 m would have a body surface area of approximately 1.90 m^2. What is the net amount of heat this … 
physics, PLEASE ANSWER, I really need help!
The basal metabolic rate is the rate at which energy is produced in the body when a person is at rest. A 70.0 kg person of height 1.79 m would have a body surface area of approximately 1.90 m^2. What is the net amount of heat this … 
physics
A down jacket has a surface area of 0.82 m2 and is filled with a 3.8 cm thick layer of down, which has a thermal conductivity of 6.0 106 kcal/(s · m · C°). The coat is worn by a person whose skin temperature is maintained at 27° … 
physics
In a house the temperature at the surface of a window is 20.1 °C. The temperature outside at the window surface is 2.72 °C. Heat is lost through the window via conduction, and the heat lost per second has a certain value. The temperature … 
physics
Assuming that the human body has a 1.2cmthick layer of skin tissue and a surface area of 1.5m2 , estimate the rate at which heat is conducted from inside the body to the surface if the skin temperature is 34 ∘C. (Assume a normal … 
Physics
In a house the temperature at the surface of a window is 22.3 °C. The temperature outside at the window surface is 2.82 °C. Heat is lost through the window via conduction, and the heat lost per second has a certain value. The temperature …