This topic contains a solution. Click here to go to the answer

Author Question: The Sun radiates at an effective temperature of 5780 K and has a radius of about 696,000 km. ... (Read 161 times)

cmoore54

  • Hero Member
  • *****
  • Posts: 568
The Sun radiates at an effective temperature of 5780 K and has a radius of about 696,000 km. Remembering that 1 AU = 149,600,000 km, derive the approximate value of the solar flux at Earth's orbit. Compare your answer with the value given in the text.
 
  What will be an ideal response?

Question 2

How do the results of (d) compare with the magnitude of the greenhouse effect on Earth?
 
  What will be an ideal response?



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Kaytorgator

  • Sr. Member
  • ****
  • Posts: 345
Answer to Question 1

Given:
Effective temperature of Sun: Te= 5780 K; Te= ((S/4)(1-A))1/4
Radius of Sun: r 0= 696,000 km
1 AU = 149,600,000 km
Solar Flux (S): S0= T04
S0= (5780)4
S0= 6.328  107 W/m2

S = S0(r0/r)
S = 6.328  107 (696,000/149,600,000)2
S = 6.328  107 (2.164  10-5)
S = 1370 W/m2

Answer to Question 2

Venus' atmosphere contains 90 bar of CO2, and it consequently has much more of a greenhouse effect than Earth, causing a temperature increase of 510.3 K compared to 33 K (more than 15 times the magnitude). Mars, on the other hand, has a significantly smaller a greenhouse effect than Earth, which only raises its temperature by 5.5 K. Mars' greenhouse effect is low because its atmosphere is thin (6 mbar) the cold temperature means that there is very little H2O in its atmosphere. This gives us some insight into the composition and size of the atmospheres of Venus and Mars.




cmoore54

  • Member
  • Posts: 568
Reply 2 on: Jul 14, 2018
Gracias!


essyface1

  • Member
  • Posts: 347
Reply 3 on: Yesterday
:D TYSM

 

Did you know?

Congestive heart failure is a serious disorder that carries a reduced life expectancy. Heart failure is usually a chronic illness, and it may worsen with infection or other physical stressors.

Did you know?

Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.

Did you know?

Cutaneous mucormycosis is a rare fungal infection that has been fatal in at least 29% of cases, and in as many as 83% of cases, depending on the patient's health prior to infection. It has occurred often after natural disasters such as tornados, and early treatment is essential.

Did you know?

The average human gut is home to perhaps 500 to 1,000 different species of bacteria.

Did you know?

Although the Roman numeral for the number 4 has always been taught to have been "IV," according to historians, the ancient Romans probably used "IIII" most of the time. This is partially backed up by the fact that early grandfather clocks displayed IIII for the number 4 instead of IV. Early clockmakers apparently thought that the IIII balanced out the VIII (used for the number 8) on the clock face and that it just looked better.

For a complete list of videos, visit our video library