the temperature of your skin is approximately 36 C ,a) assuming that your skin is a...
the temperature of your skin is approximately 36 C ,a) assuming that your skin is a black body what is the peak wavelength of the radiation it emits?, b) assuming a total surface area of 2m^2,what is a total power emitted by your skin?, c) given your answer to part (b), why do not glow as brightly as a bulb? give all answer in detail
Homework Answers
Wavelength = 
This comes from weins displacement law which gives relation between wavelength and temperature in kelvin
So wavelength = 9.38 x 10-6 m
Power is found using stefans boltzmann law
Emissivity of black body = 1
So power radiated = 1033.825 Watt
Because we emit infrared radiation which is not visible to naked eyes.
Please rate it up thanks :)
Add Answer to:
the temperature of your skin is approximately 36 C ,a)
assuming that your skin is a...
Number three please The temperature of a student's skin is 33.0 degree C. At what wavelength...
Number three please
The temperature of a student's skin is 33.0 degree C. At what wavelength does the radiation emitted from the skin reach its peak? The radius of our Sun is 6.96 times 10^8 m, and its total power output is 3.85 times 10^26 W. (a) Assuming the Sun's surface emits as a black body, calculate its surface temperature. (b) Using the result of part (a), find lambda_max for the Sun. Calculate the energy in electron volts of a...
A black body has an effective surface temperature of 450°C. Determine: (a) The total radiation energy...
A black body has an effective surface temperature of 450°C. Determine: (a) The total radiation energy (W/m2) that can be emitted by the black body (b) Determine total radiation energy (W/m%) that can be emitted by the black body within the 5-50 um wavelength region (c) The spectral blackbody emissive power of the black body at a wavelength of 10 um. 12
8. A black body has an effective surface temperature of 450°C. Determine: (a) The total radiation...
8. A black body has an effective surface temperature of 450°C. Determine: (a) The total radiation energy (W/m²) that can be emitted by the black body (b) Determine total radiation energy (W/m²) that can be emitted by the black body within the 5-50 um wavelength region (c) The spectral blackbody emissive power of the black body at a wavelength of 10 um.
Problem 8.3. The temperature of the tungsten filament in a 100 W light bulb is at 3000 C. Assume ...
Problem 8.3. The temperature of the tungsten filament in a 100 W light bulb is at 3000 C. Assume it emits as a black body and calculate: 09 (a) the area of the wire. wavelength of the max (c) the fraction emitted in: UV range Visible range 35 m25m Fig. 1 - IR range d) The fraction of energy that is transmitted through the glass window (see Fig.). e) The % of useful visible light produced by the light bulb....
2. The average person has 1.4 m2 of skin at a skin temperature of roughly 305...
2. The average person has 1.4 m2 of skin at a skin temperature of roughly 305 K (90°F) Consider the average person to be an ideal radiator standing in a room at a temperature of 293 K (68°F) (a) Calculate the power (energy per uni i) radiated by the average person in the form of blackbody radiation; express your answer in erg s-1. What is the person's "wattage"? (1 W = 107 erg s-1) Compare this to a typical incandescent...
Question 11 Assuming that your surface temperature is 98.4 F and that you are an ideal...
Question 11 Assuming that your surface temperature is 98.4 F and that you are an ideal blackbody radiator (you are close), find (a) the wavelength at which your spectral radiancy is maximum, (b) the power at which you emit thermal radiation in a wavelength range of 0.940 nm at that wavelength, from a surface area of 3.90 cm?, and (c) the corresponding rate at which you emit photons from that area. Using a wavelength of 500 nm (in the visible...
A) The emissivity of the human skin is 97.0 percent. Use 35.0 °C for the skin...
A) 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 1.93 m, a width of 38.0 cm and a length of 26.5 cm. Calculate the power emitted by the human body. B) What is the wavelength of the peak in the spectral distribution for this temperature? C) Fortunately our environment radiates too. The human body absorbs this radiation with an...
A. The emissivity of the human skin is 97.0 percent. Use 35.0 °C for the skin...
A. 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 33.0 cm and a length of 30.0 cm. Calculate the power emitted by the human body. B. What is the wavelength of the peak in the spectral distribution for this temperature? C. Fortunately our environment radiates too. The human body absorbs this radiation with an...
The human body has a surface area of approximately 1.8 m^2, a surface temperature of approximately...
The human body has a surface area of approximately 1.8 m^2, a surface temperature of approximately 30 degrees celsius , and a typical emissivity at infrared wavelengths of e = 0.97.If we make the approximation that all photons are emitted at the wavelength of peak intensity, how many photons per second does the body emit?
The temperature of a student's skin is 33.0°C. At what wavelength does the radiation emitted from the skin reach its Need Help?Read It The temperature of a student's skin is 33.0°C. At w...
The temperature of a student's skin is 33.0°C. At what wavelength does the radiation emitted from the skin reach its Need Help?Read It
The temperature of a student's skin is 33.0°C. At what wavelength does the radiation emitted from the skin reach its Need Help?Read It
Number three please
The temperature of a student's skin is 33.0 degree C. At what wavelength does the radiation emitted from the skin reach its peak? The radius of our Sun is 6.96 times 10^8 m, and its total power output is 3.85 times 10^26 W. (a) Assuming the Sun's surface emits as a black body, calculate its surface temperature. (b) Using the result of part (a), find lambda_max for the Sun. Calculate the energy in electron volts of a...
A black body has an effective surface temperature of 450°C. Determine: (a) The total radiation energy (W/m2) that can be emitted by the black body (b) Determine total radiation energy (W/m%) that can be emitted by the black body within the 5-50 um wavelength region (c) The spectral blackbody emissive power of the black body at a wavelength of 10 um. 12
8. A black body has an effective surface temperature of 450°C. Determine: (a) The total radiation energy (W/m²) that can be emitted by the black body (b) Determine total radiation energy (W/m²) that can be emitted by the black body within the 5-50 um wavelength region (c) The spectral blackbody emissive power of the black body at a wavelength of 10 um.
Problem 8.3. The temperature of the tungsten filament in a 100 W light bulb is at 3000 C. Assume it emits as a black body and calculate: 09 (a) the area of the wire. wavelength of the max (c) the fraction emitted in: UV range Visible range 35 m25m Fig. 1 - IR range d) The fraction of energy that is transmitted through the glass window (see Fig.). e) The % of useful visible light produced by the light bulb....
2. The average person has 1.4 m2 of skin at a skin temperature of roughly 305 K (90°F) Consider the average person to be an ideal radiator standing in a room at a temperature of 293 K (68°F) (a) Calculate the power (energy per uni i) radiated by the average person in the form of blackbody radiation; express your answer in erg s-1. What is the person's "wattage"? (1 W = 107 erg s-1) Compare this to a typical incandescent...
Question 11 Assuming that your surface temperature is 98.4 F and that you are an ideal blackbody radiator (you are close), find (a) the wavelength at which your spectral radiancy is maximum, (b) the power at which you emit thermal radiation in a wavelength range of 0.940 nm at that wavelength, from a surface area of 3.90 cm?, and (c) the corresponding rate at which you emit photons from that area. Using a wavelength of 500 nm (in the visible...
The temperature of a student's skin is 33.0°C. At what wavelength does the radiation emitted from the skin reach its Need Help?Read It
The temperature of a student's skin is 33.0°C. At what wavelength does the radiation emitted from the skin reach its Need Help?Read It
Most questions answered within 3 hours.
-
Where is the error in this code sequence?
String s1 = "Hello";
String s2 = "ello";...
asked 11 months ago -
Financial data for Joel de Paris, Inc., for last year
follow:
Joel de Paris, Inc.
Balance...
asked 11 months ago -
Consider this reaction:
Al2(SO4)3 (aq)+ BaCl3
(aq) Al2Cl6 (aq)- +
3BaSO4(s) . What is the...
asked 11 months ago -
Suppose that Savneet is considering increasing her
recent random sample from 20 car rentals to 40...
asked 11 months ago -
Trucks arrive at an unloading terminal at an average rate of 120
per hour.
Trucks arrive...
asked 11 months ago -
Why are methanol and ethanol completely soluble in water while
octanol is not very little soluble....
asked 11 months ago -
A facilities manager at a university reads in a research report
that the mean amount of...
asked 11 months ago -
When the CuSO4 is rehydrated by adding water to the anhydrous
compound, is this an endothermic...
asked 11 months ago -
A ray of sunlight is passing from diamond into crown glass; the
angle of incidence is...
asked 11 months ago -
A block of mass 0.249 kg is placed on top of a light, vertical
spring of...
asked 11 months ago -
how do the kidneys compensate in the presences of acidosis
a) trigger hyperventilate
b) reserve acid...
asked 11 months ago -
Question 501 pts
The rental rate of capital to the firm increases. Which of the
following...
asked 11 months ago