it is estimated that the sun will exhaust all of its energy inabout ten billion years. by that time, it will have radiated about1.2 multiplication sign 10 44j(joules) of enery. Express thisamount of energy in

a) kilojoules.

b) nanojoules

,

,

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The surface temperature of our Sun is about 5800K. Assuming that it acts as a blackbody:

(a) What is the power flux radiated by the Sun, in W/m²?

(b) If the surface area of the Sun is 6.087 x 10¹²m², what is the total power emitted in watts?

(c) Because watts are .I/s, how many joules of energy are radiated in one year ( 365 days)? (Note: The Sun is actually a very poor approximation of a blackbody.)

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Does the Aggie bonfire make physics sense? Estimate the energyconsumed from wood and oxygen burned in air in a fire and relate itto the thermal energy radiated. You can estimate the temperature ofthe fire from its colorâburnt-orange, of course. Wood, like jellydonuts and TNT will have an energy content of approximately 4mega-Joules/kg. Make your own estimate of the time it takes toconsume a log in a large bonfire and the other physical parametersthat are relevant.
**Explain in details please...

a)The earth is in a state of balance where the radiated energyfrom the Earth balances the incident energy from the Sun. Determinethe effective temperature of the Earth (neglecting the GreenhouseEffect).

b) Due to gases in the atmosphere approximately 150Wm^-2 isre-radiated back to the surface. Using the Stefan-Boltzmannexpression, show that the global mean temperature of hte earth'ssurface is approximately 15 degrees (Celcius). Why does this answerdiffer from part a)? (Hint you will need to recalculate the Powerdensity to determine the amount of surface radiation before usingthe Stefan-Boltzmann equation). Stefan-Boltzmann constant = 5.672 *10^-8 W/m^2K^4

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it is estimated that the sun will exhaust all of its energy inabout ten billion years. by that time, it will have radiated about1.2 multiplication sign 10 44j(joules) of enery. Express thisamount of energy in

a) kilojoules.

b) nanojoules

,

,

Related textbook solutions

Physics: Principles with Applications

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it is estimated that the sun will exhaust all of its energy inabout ten billion years. by that time, it will have radiated about1.2 multiplication sign 10 44j(joules) of enery. Express thisamount of energy in a) kilojoules. b) nanojoules , ,

Related textbook solutions

Physics: Principles with Applications

Related questions

Weekly leaderboard

it is estimated that the sun will exhaust all of its energy inabout ten billion years. by that time, it will have radiated about1.2 multiplication sign 10 44j(joules) of enery. Express thisamount of energy in

a) kilojoules.

b) nanojoules

,

,