Question

Radiation from the head is a major source of heat loss from the human body. Model a head as a 20-cm diameter, 20-cm tall cylinder with a flat top. If the body's surface temperature is 36 °C, what is the net rate of heat loss on a chilly 7 °C day in W? All skin, regardless of color, is effectively black in the infrared where the radiation occurs, so use an emissivity of 0.92.

Name: radiation from the head is a major source of heat loss from the human body model a head as a 20 cm diameter 20 cm tall cylinder with a flat topif the bodys surface temperature is 36 cwhat is 85171
Uploaded: 2020-06-07T21:01:17-08:00
Duration: 2 min 58 s
Channel: Dading Chen
Description: radiation from the head is a major source of heat loss from the human body model a head as a 20 cm diameter 20 cm tall cylinder with a flat topif the bodys surface temperature is 36 cwhat is 85171

          Radiation from the head is a major source of heat loss from the human body. Model a head as a 20-cm diameter, 20-cm tall cylinder with a flat top. If the body's surface temperature is 36 °C, what is the net rate of heat loss on a chilly 7 °C day in W? All skin, regardless of color, is effectively black in the infrared where the radiation occurs, so use an emissivity of 0.92.

Added by Jose Miguel C.

University Physics with Modern Physics

Hugh D. Young 14th Edition

Instant Answer

Solved by Expert Dading Chen

06/07/2020

Step 1

Given that the radius \(r = 10\) cm (0.1 m) and height \(h = 20\) cm (0.2 m), we have: \(A = \pi (0.1)^2 + 2\pi (0.1)(0.2)\) \(A = \pi (0.01) + 2\pi (0.02)\) \(A = 0.0314 + 0.1256\) \(A = 0.157 m^2\) Show more…

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Radiation from the head is a major source of heat loss from the human body. Model a head as a 20-cm diameter, 20-cm tall cylinder with a flat top. If the body's surface temperature is 36 °C, what is the net rate of heat loss on a chilly 7 °C day in W? All skin, regardless of color, is effectively black in the infrared where the radiation occurs, so use an emissivity of 0.92.