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I. (a) Lighting produces a maximum air temperature of~ 2x104 K, whereas (b) a nuclear explosion...
Lightning produces a maximum air temperature on the order of 9.7 ✕ 103 K, whereas a...
Lightning produces a maximum air temperature on the order of 9.7 ✕ 103 K, whereas a nuclear explosion produces a temperature on the order of 9.4 ✕ 106 K. Use Wien's displacement law to calculate the wavelength of the thermally-produced photons radiated with greatest intensity by each of these sources. Select the part of the electromagnetic spectrum where you would expect each to radiate most strongly. (a) lightning λmax ≈________ nm (b) nuclear explosion λmax ≈___________pm
Lightning produces a maximum air temperature on the order of 8.9 ✕ 103 K, whereas a...
Lightning produces a maximum air temperature on the order of 8.9 ✕ 103 K, whereas a nuclear explosion produces a temperature on the order of 9.4 ✕ 106 K. Use Wien's displacement law to calculate the wavelength of the thermally-produced photons radiated with greatest intensity by each of these sources. Select the part of the electromagnetic spectrum where you would expect each to radiate most strongly. (a) lightning λmax ≈ ....nm It radiates most strongly in the ---Select--- gamma ray /...
Lightning produces a maximum air temperature on the order of 8.7 × 103 K, whereas a...
Lightning produces a maximum air temperature on the order of 8.7 × 103 K, whereas a nuclear explosion produces a temperature on the order of 8.8 × 106 K. Use Wien's displacement law to calculate the wavelength of the thermally- produced photons radiated with greatest intensity by each of these sources. Select the part of the electromagnetic spectrum where you would expect each to radiate most strongly. (a) lightning Amax 3.33e-7 Your response differs significantly from the correct answer. Rework...
Problem 13.4 It has been reported that an explosion of nuclear fission produces a power e radiated energy of 1×10^16 Wa...
Problem 13.4
It has been reported that an explosion of nuclear fission
produces a power e radiated energy of 1×10^16
Watts. The measurement was made at a distance of
10 Km from the explosion.
a) Calculate the temperature reached at the explosion site
considering a 1cm sphere placed on that site
b) What was the radiation flow (power-incident per unit area)
measured?
c) A sphere placed at the site of the explosion, at what maximum
wavelength would it have radiated?...
Q2 (a) A 12 mm diameter mild steel sphere (k = 42.5 W/m K) is exposed...
Q2 (a) A 12 mm diameter mild steel sphere (k = 42.5 W/m K) is exposed to cooling airflow at 27 "C resulting in the convective coefficient, h = 114 W/m' K. The relevant properties of mild steel are given as follows: Density p= 7850 kg/m . Specific heat c = 475 J/kg K and thermal diffusivity a = 0.043 m/hr Determine: (i) Time required to cool the sphere (lumped parameter system) from 540 °C to 95°C. [7 marks] (ii)...
I can see here that for question B Stefan–Boltzmann law was used. However, the energy per unit area is being divided per 4. why? The ratio distance of Mars from the Sun 1.5 6. distance of Earth from...
I can see here that for question B Stefan–Boltzmann law was
used. However, the energy per unit area is being divided per 4.
why?
The ratio distance of Mars from the Sun 1.5 6. distance of Earth from the Sun (a) Show that the intensity of solar radiation at the orbit of Mars is about 600 W m2 (b) Determine, in K, the mean surface temperature of Mars. Assume that Mars acts as a black body. 121 (c) The atmosphere...
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...
help please? this was the only other information given REPORT SHEET Determination of the Solubility-Product Constant...
help please?
this was the only other information given
REPORT SHEET Determination of the Solubility-Product Constant for a Sparingly Soluble Salt EXPERIMENT 8 A. Preparation of a Calibration Curve Initial (Cro121 0.0024 M Absorbance 5 mL Volume of 0.0024 M K Cro Total volume 1. I mL 100 mL 2. 100ML 3. 10 mL 100ml 4. 15 mL 100 ML Molar extinction coefficient for [CrO2) [Cro,2) 2.4x100M 12x1044 2.4810M 3.6810M 0.04) 2037.37 0.85 1.13 2. 3. Average molar extinction coefficient...
Lightning produces a maximum air temperature on the order of 8.7 × 103 K, whereas a nuclear explosion produces a temperature on the order of 8.8 × 106 K. Use Wien's displacement law to calculate the wavelength of the thermally- produced photons radiated with greatest intensity by each of these sources. Select the part of the electromagnetic spectrum where you would expect each to radiate most strongly. (a) lightning Amax 3.33e-7 Your response differs significantly from the correct answer. Rework...
Problem 13.4
It has been reported that an explosion of nuclear fission
produces a power e radiated energy of 1×10^16
Watts. The measurement was made at a distance of
10 Km from the explosion.
a) Calculate the temperature reached at the explosion site
considering a 1cm sphere placed on that site
b) What was the radiation flow (power-incident per unit area)
measured?
c) A sphere placed at the site of the explosion, at what maximum
wavelength would it have radiated?...
Q2 (a) A 12 mm diameter mild steel sphere (k = 42.5 W/m K) is exposed to cooling airflow at 27 "C resulting in the convective coefficient, h = 114 W/m' K. The relevant properties of mild steel are given as follows: Density p= 7850 kg/m . Specific heat c = 475 J/kg K and thermal diffusivity a = 0.043 m/hr Determine: (i) Time required to cool the sphere (lumped parameter system) from 540 °C to 95°C. [7 marks] (ii)...
I can see here that for question B Stefan–Boltzmann law was
used. However, the energy per unit area is being divided per 4.
why?
The ratio distance of Mars from the Sun 1.5 6. distance of Earth from the Sun (a) Show that the intensity of solar radiation at the orbit of Mars is about 600 W m2 (b) Determine, in K, the mean surface temperature of Mars. Assume that Mars acts as a black body. 121 (c) The atmosphere...
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...
help please?
this was the only other information given
REPORT SHEET Determination of the Solubility-Product Constant for a Sparingly Soluble Salt EXPERIMENT 8 A. Preparation of a Calibration Curve Initial (Cro121 0.0024 M Absorbance 5 mL Volume of 0.0024 M K Cro Total volume 1. I mL 100 mL 2. 100ML 3. 10 mL 100ml 4. 15 mL 100 ML Molar extinction coefficient for [CrO2) [Cro,2) 2.4x100M 12x1044 2.4810M 3.6810M 0.04) 2037.37 0.85 1.13 2. 3. Average molar extinction coefficient...
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