Question

Suppose you walk into a sauna that has an ambient temperature of 50.0 ∘C. (a) Calculate...

Suppose you walk into a sauna that has an ambient temperature of 50.0 ∘C.

(a) Calculate the rate of heat transfer to you by radiation in watts, given your skin temperature is 37.0 ∘C, the emissivity of skin is 0.98, and the surface area of your body is 1.4 m2.

(b) If all other forms of heat transfer are balanced (the net heat transfer is zero), how much will your body temperature increase if your mass is 70 kg, and sit inside the sauna for 1 h?

Science   Physics   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

Please give a positive rating by clicking on the thumbs up ? button if you get benefited from this answer? have a good day ahead. Thank you?

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A wood fire has a temperature of 600◦C. A person with a total surface area of...
A wood fire has a temperature of 600◦C. A person with a total surface area of 1.6 m2 and at a temperature of 34◦C stands next to the fire. If the emissivity is 0.95, determine the rate of radiative heat transfer, in kW. Assume that only one-half of the total person surface area is exposed to the fire.
The emissivity of the human skin is 97.0 percent. Use 35.0 °C for the skin temperature...
The emissivity of the human skin is 97.0 percent. Use 35.0 °C for the skin temperature and approximate the human body by a rectangular block with a height of 1.55 m, a width of 37.0 cm and a length of 31.5 cm. 1. Calculate the power emitted by the human body. Hints: Calculate the total surface area of the body. Convert the body temperature from Celsius to Kelvin. Then use the Stefan-Boltzmann law. Incorrect. Tries 1/12 Previous Tries 2. What...
It’s a hot, 100°F (38°C), summer day and you are going for a picnic. To keep...
It’s a hot, 100°F (38°C), summer day and you are going for a picnic. To keep your food and drinks cold, you bring a white Styrofoam cooler packed with ice and put it in the shade. Assuming there is enough ice in the cooler that the inside temperature remains at 0°C, will your cooler receive more heat from radiation or conduction? The cooler is made out of 2 cm thick layer of Styrofoam with a thermal conductivity of 0.010 J/(s...
Consider a person who is trying to keep cool on a hot summer day by turning...
Consider a person who is trying to keep cool on a hot summer day by turning a fan on and exposing his entire body to air flow. The air temperature is 40°C and the fan is blowing air at a velocity of 2 m/s. If the person is doing light work and generating sensible heat at a rate of 300 kJ/h, determine the average temperature of the outer surface (skin or clothing) of the person. The average human body can...
a) A 12 mm diameter mild steel sphere (k = 42.5 W/m K) is exposed to...
a) A 12 mm diameter mild steel sphere (k = 42.5 W/m K) is exposed to cooling airflow at 27 0C resulting in the convective coefficient, h = 114 W/ m2 K. The relevant properties of mild steel are given as follows: Density , /7850 2 mkg  Specific heat K kgJc p / 475 and thermal diffusivity hr m /043.0 2  Determine: (i) Time required to cool the sphere (lumped parameter system) from 540 0C to 950C. [7...
The basal metabolic rate is the rate at which energy is produced in the body when...
The basal metabolic rate is the rate at which energy is produced in the body when a person is at rest. A 66 kg (146 lb) person of height 1.83 m (6.0 ft) would have a body surface area of approximately 1.9 m2. What is the net amount of heat this person could radiate per second into a room at 18.0 ∘C (about 64.4 ∘F) if his skin's surface temperature is 31.0 ∘C? (At such temperatures, nearly all the heat...
4.1A clothed or unclothed person feels comfortable when the skin temperature is about 33oC. Consider an...
4.1A clothed or unclothed person feels comfortable when the skin temperature is about 33oC. Consider an average man wearing summer clothes whose thermal resistance is 0.109 m2 ? oC/W. The man feels very comfortable while standing in a room maintained at 20oC. If this man were to stand in that room unclothed, determine the temperature at which the room must be maintained for him to feel thermally comfortable. Assume the latent heat loss from the person to remain the same....
Suppose you are sitting, naked, on a steel bench with a temperature of 10°C. The only...
Suppose you are sitting, naked, on a steel bench with a temperature of 10°C. The only thing insulating the core of your body (temperature 37°C) is a layer of skin (the epidermis and dermis together are about 4 mm thick) and fat (varies from individual to individual, but a typical thickness on the buttocks and the back of the thighs might be 1.0 cm.) Estimate the rate of heat loss by conduction under this circumstance. I estimated the area of...
a. Discuss why car inside temperature is high when you park the car outside in a...
a. Discuss why car inside temperature is high when you park the car outside in a sunny day even under the shade and the relation with glass transmissivity (Greenhouse effect). [5 marks] b. A double walled spherical tank is used to store iced water at O'C. The tank internal diameter is 2 m and wall thickness is 0.5 cm. The inner and outer walls are separated with the 2 cm thick space. The air between the two walls of the...
1. An oven chimney is made of brick with a heat transmission coefficient 1.1 W/mK 10...
1. An oven chimney is made of brick with a heat transmission coefficient 1.1 W/mK 10 cm thick. Since the shaft exterior radiation beam coefficient is 0.8 and the flue gas temperature is 350°C, the external ambient temperature is 25°C and the outer ambient heat transport coefficient is 20 W/m2K; a) Calculate the shaft exterior temperature. b) In order to reduce the risk of burn injury that may occur in the body, the shaft is asked to be below 55°Cve...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT