This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: The Sun radiates at an effective temperature of 5780 K and has a radius of about 696,000 km. ... (Read 123 times)

cmoore54

  • Hero Member
  • *****
  • Posts: 568
on: Jul 14, 2018
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
Reply #1 on: Jul 14, 2018
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
Great answer, keep it coming :)

Animal_Goddess

  • Member
  • Posts: 339
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

If you use artificial sweeteners, such as cyclamates, your eyes may be more sensitive to light. Other factors that will make your eyes more sensitive to light include use of antibiotics, oral contraceptives, hypertension medications, diuretics, and antidiabetic medications.

Did you know?

IgA antibodies protect body surfaces exposed to outside foreign substances. IgG antibodies are found in all body fluids. IgM antibodies are the first type of antibody made in response to an infection. IgE antibody levels are often high in people with allergies. IgD antibodies are found in tissues lining the abdomen and chest.

Did you know?

In 1864, the first barbiturate (barbituric acid) was synthesized.

Did you know?

Serum cholesterol testing in adults is recommended every 1 to 5 years. People with diabetes and a family history of high cholesterol should be tested even more frequently.

Did you know?

The use of salicylates dates back 2,500 years to Hippocrates's recommendation of willow bark (from which a salicylate is derived) as an aid to the pains of childbirth. However, overdosage of salicylates can harm body fluids, electrolytes, the CNS, the GI tract, the ears, the lungs, the blood, the liver, and the kidneys and cause coma or death.

Temperature profile of the Uranian troposphere and lower stratosphere. Cloud and haze layers are als Temperature profile of the Uranian troposphere and lower stratosphere. Cloud and haze layers are als
Measuring Oral Temperature Using an Electronic Thermometer Measuring Oral Temperature Using an Electronic Thermometer
The relationship between RH and temperature. The relationship between RH and temperature.
Check heat source for temperature. Evaluate the amount of heat given off from the source using your ... Check heat source for temperature. Evaluate the amount of heat given off from the source using your ...
Calculate KP for the following reactions at the indicated temperature. Calculate KP for the following reactions at the indicated temperature.
A melting profile shows the increase in UV absorption versus temperature A melting profile shows the increase in UV absorption versus temperature
Video: Transcription—A molecular view

For a complete list of videos, visit our video library