COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Chapter 26, Problem 49QAP
To determine
The time that it will take to boil a cup of water when the temperature of a blackbody is increased from 400 K to 500 K.
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Figure 1-2
Q2 Using Figure 1-2, answer/complete the following:
• In Figure 1-2, what three regions of the EM spectrum are included?
Identify the wavelength at which the Sun emits the most energy:
dmax intensity
Radiation intensity-
The Earth is spherical in shape and can be considered to be a perfect black body radiator at a temperature of 58 °C. Radius of Earth is 6360 km . (consider: Stefan's constant a = 5.67 x 10-8 W/m²T4) Calculate the total power radiated from the Earth in Watts
Chapter 26 Solutions
COLLEGE PHYSICS
Ch. 26 - Prob. 1QAPCh. 26 - Prob. 2QAPCh. 26 - Prob. 3QAPCh. 26 - Prob. 4QAPCh. 26 - Prob. 5QAPCh. 26 - Prob. 6QAPCh. 26 - Prob. 7QAPCh. 26 - Prob. 8QAPCh. 26 - Prob. 9QAPCh. 26 - Prob. 10QAP
Ch. 26 - Prob. 11QAPCh. 26 - Prob. 12QAPCh. 26 - Prob. 13QAPCh. 26 - Prob. 14QAPCh. 26 - Prob. 15QAPCh. 26 - Prob. 16QAPCh. 26 - Prob. 17QAPCh. 26 - Prob. 18QAPCh. 26 - Prob. 19QAPCh. 26 - Prob. 20QAPCh. 26 - Prob. 21QAPCh. 26 - Prob. 22QAPCh. 26 - Prob. 23QAPCh. 26 - Prob. 24QAPCh. 26 - Prob. 25QAPCh. 26 - Prob. 26QAPCh. 26 - Prob. 27QAPCh. 26 - Prob. 28QAPCh. 26 - Prob. 29QAPCh. 26 - Prob. 30QAPCh. 26 - Prob. 31QAPCh. 26 - Prob. 32QAPCh. 26 - Prob. 33QAPCh. 26 - Prob. 34QAPCh. 26 - Prob. 35QAPCh. 26 - Prob. 36QAPCh. 26 - Prob. 37QAPCh. 26 - Prob. 38QAPCh. 26 - Prob. 39QAPCh. 26 - Prob. 40QAPCh. 26 - Prob. 41QAPCh. 26 - Prob. 42QAPCh. 26 - Prob. 43QAPCh. 26 - Prob. 44QAPCh. 26 - Prob. 45QAPCh. 26 - Prob. 46QAPCh. 26 - Prob. 47QAPCh. 26 - Prob. 48QAPCh. 26 - Prob. 49QAPCh. 26 - Prob. 50QAPCh. 26 - Prob. 51QAPCh. 26 - Prob. 52QAPCh. 26 - Prob. 53QAPCh. 26 - Prob. 54QAPCh. 26 - Prob. 55QAPCh. 26 - Prob. 56QAPCh. 26 - Prob. 57QAPCh. 26 - Prob. 58QAPCh. 26 - Prob. 59QAPCh. 26 - Prob. 60QAPCh. 26 - Prob. 61QAPCh. 26 - Prob. 62QAPCh. 26 - Prob. 63QAPCh. 26 - Prob. 64QAPCh. 26 - Prob. 65QAPCh. 26 - Prob. 66QAPCh. 26 - Prob. 67QAPCh. 26 - Prob. 68QAPCh. 26 - Prob. 69QAPCh. 26 - Prob. 70QAPCh. 26 - Prob. 71QAPCh. 26 - Prob. 72QAPCh. 26 - Prob. 73QAPCh. 26 - Prob. 74QAPCh. 26 - Prob. 75QAPCh. 26 - Prob. 76QAPCh. 26 - Prob. 77QAPCh. 26 - Prob. 78QAPCh. 26 - Prob. 79QAPCh. 26 - Prob. 80QAPCh. 26 - Prob. 81QAPCh. 26 - Prob. 82QAPCh. 26 - Prob. 83QAPCh. 26 - Prob. 84QAPCh. 26 - Prob. 85QAPCh. 26 - Prob. 86QAPCh. 26 - Prob. 87QAPCh. 26 - Prob. 88QAPCh. 26 - Prob. 89QAPCh. 26 - Prob. 90QAPCh. 26 - Prob. 91QAPCh. 26 - Prob. 92QAPCh. 26 - Prob. 93QAPCh. 26 - Prob. 94QAPCh. 26 - Prob. 95QAPCh. 26 - Prob. 96QAPCh. 26 - Prob. 97QAPCh. 26 - Prob. 98QAPCh. 26 - Prob. 99QAPCh. 26 - Prob. 100QAPCh. 26 - Prob. 101QAPCh. 26 - Prob. 102QAPCh. 26 - Prob. 103QAPCh. 26 - Prob. 104QAP
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- d) The Rosseland mean opacity at the centre of the Sun is 0.217 m2·kg−1. i) determine the mean free path of a photon at the centre of the Sunii) if the mean free path in part (i) remained constant, calculate the averageeffective time it would take for a photon originating from the centre to beemitted from the Sun.arrow_forwardQl: A nuclear bomb at the instant of explosion may be approximated to a blackbody of radius 1.3 m with a surface temperature of 10' K. find the bomb emits power ?arrow_forwardThe blackbody radiation emitted from a furnace peaks at a wavelength of 6.4 x 10-°m (0.0000064 m). What is the temperature inside the furnace? Karrow_forward
- 3. Dimensional analysis can provide insight into Stefan-Boltzmann's law for the radiation from a black body. According to this law the intensity of radiation, in units of J s-' m-², from a body at temperature Tis 1 = GT*, where e is Stefan-Boltzmann's constant. Because black-body radiation can be considered to be a gas of photons, i.e. quantum particles which move with velocity e with typical energies of the order of kT, the intensity I is a function of h, c and kT. Use dimensional analysis to confirm that Iis proportional to 7 and find the dependence of a on h and c.arrow_forward•61 SSM The function (x) displayed in Eq. 38-27 can describe a free particle, for which the potential energy is U(x) = 0 in Schrödinger's equation (Eq. 38-19). Assume now that U(x) = U, = a constant in that equation. Show that Eq. 38-27 is a solution of Schrödinger's equation, with %3D -V2m(E – U) giving the angular wave number k of the particle. k k =arrow_forward3- The first ionization coefficient a for a certain gas is given approximately by a/p = 14 exp (- 240p/E) where p is the pressure in torr and E the electric field in V/cm. Find the value of E for maximum %3D electron multiplication at a pressure of 3 torr and the multiplication then obtained between electrodes 5 cm apart.arrow_forward
- The wavelength at which the Sun emits its most intense light is about 550 nm. (The Sun's data can be found on the inside back cover of the book; use Stefan's Law to calculate the power.) a) Assuming the Sun radiates as a perfect blackbody, estimate its surface temperature. b) Assuming the Sun radiates as a perfect blackbody, estimate its total emitted power.arrow_forward76 ACTIVITY 34 • Timing from the Big Bang to Today Now we are at the time when the temperature is 10" K and the density is 10 times that of water. We watch the universe shrink exponentially (reversing its 10" growth originally), sometime between 10 and 10-33 seconds after the Big Bang. It is now the Planck era, 10 seconds after the Big Bang, and the temperature is 10" K and the density is 10% times that of water. The four fundamental forces are combined under the thcory of everything (TOE). We have arrived at a time when the conditions of the universe are unknown; our theories are unable to describe it. 1. At the stage where Big Bang nucleosynthesis was occurring, the temperature and density of the universe were about K and kg/marrow_forwardiv) Radiations are emitted by a blackbody at 1232 ℃ peaking at wavelength of 5032 Å. Find the wavelength at which maximum intensity is observed, when the temperature of the body is increased by 1032 ℃.arrow_forward
- Check Your Understanding Suppose that two stars, and . radiate exactly the same total power. If the radius of star is three times that of star , what is the ratio of the surface temperatures of these stars? Which one is hotter?arrow_forwardHow much does the power radiated by a blackbody increase when its temperature (in K) is tripled?arrow_forward3. Dimensional analysis can provide insight into Stefan-Boltzmann's law for the radiation from a black body. According to this law the intensity of radiation, in units of J s- m-2, from a body at temperature T isarrow_forward
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