Question

3.9 e wind chill, which is experienced on a cold indy day, is related to increased heat transfer from exposed human skin to t
0 0
Add a comment Improve this question Transcribed image text
Answer #1

wind To 15°C Human body - icaron as work k3mmy - - kuundy = 65 white Ty » 36°c As per darabook. K... = 0.370 W/mk (human skinSI nuclay 0.003 0.3701 + 1 6501 ( mindy & 2170 .ss wper m² area Wow, Rapio of heat loss per mich area for the calm day to tha(31-1) = (1+1) 95 370x12 - 37012 & 2572 + 375 4440-375 - (75 + 370) 12 4440-375 (2) ann laten day : 2746 4 how (1) during winAir temperature on the calm day so that it will produce same effect as ou te mindy day by rise tupurature: - how me know that

Add a comment
Know the answer?
Add Answer to:
3.9 e wind chill, which is experienced on a cold indy day, is related to increased...
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions
  • On a windy day, we can define the wind-chill temperature Twc as the air temperature that...

    On a windy day, we can define the wind-chill temperature Twc as the air temperature that would give the same rate of heat loss if experienced on a calm day. Consider a day when the air temperature is 2°C and the wind speed is 12 m/s, giving a convective heat transfer coefficient of 45 W/m2⋅K (compared with 10 W/m2⋅K on a calm day). Assume a person has a 3 mm layer of skin (k = 0.37 W/m⋅K), a body surface...

  • Wind Chill 50 45 40 35 30 Wind Speed (km/h) 25 20 15 10 5 0...

    Wind Chill 50 45 40 35 30 Wind Speed (km/h) 25 20 15 10 5 0 in -10 -15 -20 35 40 -45 -50 Air Temperature (°C) Task: The wind chill index measures the sensation of cold on the human skin. In October 2001, Environment Canada introduced the wind chill index above. Each curve represents the combination of air temperature and wind speed that would produce the given wind chill value. For example, a temperature of -25°C and wind speed...

  • izon- e and sur- osed loss calm ffec- e the ce to 1-106 A nonmetal plate...

    izon- e and sur- osed loss calm ffec- e the ce to 1-106 A nonmetal plate (k = 0.05 W/m.K) and an ASME SA-240 stainless steel plate (k = 15 W/m-K) are bolted together by ASTM B21 naval brass bolts. Both plates have a thickness of 38 mm, and the brass bolts are bolted through both plates. The bottom steel plate surface (surface 1) is subjected to a uniform heat flux of 200 W/m². The top non- metal plate surface...

  • Cold conditioned air at 10°C is flowing inside a 1.5 cm thick square aluminum (k = 240 w/mK) duct...

    Cold conditioned air at 10°C is flowing inside a 1.5 cm thick square aluminum (k = 240 w/mK) duct of inner cross section of 25x25cm at a mass flow rate of 1.0 kg/s. The duct is exposed to air at 35°C with a combined convection-radiation heat transfer coefficient of 15 W/m2K. The convection heat transfer coefficient at the inner surface is 75 W/.m2.K. If the air temperature in the duct should not increase by more than 1°C determine the maximum...

  • please help me as soon as possible [20] SECTION B (Attempt any one Question) a) A...

    please help me as soon as possible [20] SECTION B (Attempt any one Question) a) A turbine blade 6 cm long and having a cross sectional area 4.65 cm and perimeter 12 cm is made of stainless steel (k=23.3 W/mK). The temperature at the root is 500 °C. The blade is exposed to a hot gas at 870 °C. The heat transfer coefficient between the blade surface and gas is 442 W/mK. Determine the temperature distribution and rate of heat...

  • “A pipe is carrying hot water through a cold storage facility. The ambient air in the...

    “A pipe is carrying hot water through a cold storage facility. The ambient air in the cold storage has temperature of ?5?C. To maintain uniform temperature in the cold storage, blowers installed in the facility induce a 3 m/s velocity to the cold air (which can be assumed to be flowing across the water pipe). Hot water inside the pipe has a mean velocity of 0.5 m/s. The internal and exter- nal diameter of the pipe are 8.4 cm and...

  • One end of a long rod 3 cm in diameter is inserted into a furnace with the

    One end of a long rod 3 cm in diameter is inserted into a furnace with the (3 outer end projecting into the outside air. Once the steady state is reached the temperature of the rod is measured at two points, 15 cm apart and found to be 140°C and 100°C, when the atmospheric air is at 30°C with convection coefficient of 20 W/m2.K. Calculate the thermal conductivity of *.the rod material Consider a stainless steel spoon(k = 15.1 W/m.K), partially...

  • The boiling temperature of nitrogen at atmospheric pressure at sea level (1 atm pressure) is -196°C. Therefore, nitroge...

    The boiling temperature of nitrogen at atmospheric pressure at sea level (1 atm pressure) is -196°C. Therefore, nitrogen is commonly used in low-temperature scientific studies since the temperature of liquid nitrogen in a tank open to the atmosphere will remain constant at -196°C until it is depleted. Any heat transfer to the tank will result in the evaporation of some liquid nitrogen, which has a heat of vaporization of 198 kJ/kg and a density of 810 kg/m3 at 1 atm....

  • Heat Transfer 1 Problem 1 During a cold winter day, wind at 55 km/h is blowing...

    Heat Transfer 1 Problem 1 During a cold winter day, wind at 55 km/h is blowing parallel to a 4-m-high and 10-m-long wall of a house. If the air outside is at 5°C and the surface temperature of the wall is 12°C, determine (a) friction coefficient at the center of the wall (b) heat transfer coefficient at the center of the wall (c) drag force on the wall (d) the rate of heat loss from on the wall Use Table...

  • Homework 3 The figure below shows a very simple model of your skin on a very...

    Homework 3 The figure below shows a very simple model of your skin on a very cold day in Wisconsin. The skin is composed of two lavers. The inner laver is the dermis which has a thickness of tha-3 mm and conductivity k- 0.32 W/m-K. The epidermis is the outer layer which has a thickness of thed0.12 mm and conductivity kod 0.14 W/m-K. The inner surface of the dermis is exposed to blood flow and therefore remains at Tiod34°C. The...

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT