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

Author Question: Venus and Mars orbit the Sun at average distances of 0.72 AU and 1.52 AU, respectively. What is the ... (Read 119 times)

storky111

  • Hero Member
  • *****
  • Posts: 561
on: Jul 14, 2018
Venus and Mars orbit the Sun at average distances of 0.72 AU and 1.52 AU, respectively. What is the solar flux at each planet?
 
  What will be an ideal response?

Question 2

Venus has a planetary albedo of 0.8, and Mars has an albedo of 0.22. Using the answer to part (a), determine the effective radiating temperatures of these planets.
 
  What will be an ideal response?

Question 3

if the two bodies in part (a) were the same size, what would be the ratio of the heat emitted by the hotter object to the heat emitted by the colder one?
 
  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

bobsmith

  • Sr. Member
  • ****
  • Posts: 316
Reply #1 on: Jul 14, 2018
Answer to Question 1

Inverse Square Law: S = S0(r0/r)
Given: SEarth= 1370 W/m2
rEarth = 1 AU
rVenus = 0.72 AU
rMars = 1.52 AU

Venus: SVenus = SEarth ( rEarth / rVenus)2
SVenus = 1370 W/m2 (1 AU/ 0.72 AU)2
SVenus  2642.8 W/m2

Mars: SMars = SEarth ( rEarth / rMars)2
SVenus = 1370 W/m2 (1 AU/ 1.52 AU)2
SVenus  593.0 W/m2

Answer to Question 2

Effective Radiating Temp:
Given: Te4 = S(1-A)/4
AVenus= 0.8
AMars = 0.22

Venus: Te=(SVenus/4)(1-AVenus)1/4
Te=(2642.8 W/m2 /4 (5.67  10 8 W/m2/K4)(1-0.8)1/4
Venus Te = 219.7 K

Mars: Te=(SMars/4)(1-AMars)1/4
Te=(593.0 W/m2 /4 (5.67  10 8 W/m2/K4)(1-0.22)1/4
Mars Te = 212.5 K

Answer to Question 3

Stefan-Boltzmann Law:


storky111

  • Member
  • Posts: 561
Reply 2 on: Jul 14, 2018
Great answer, keep it coming :)

scottmt

  • Member
  • Posts: 322
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

Did you know?

The human body produces and destroys 15 million blood cells every second.

Did you know?

There used to be a metric calendar, as well as metric clocks. The metric calendar, or "French Republican Calendar" divided the year into 12 months, but each month was divided into three 10-day weeks. Each day had 10 decimal hours. Each hour had 100 decimal minutes. Due to lack of popularity, the metric clocks and calendars were ended in 1795, three years after they had been first marketed.

Did you know?

Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.

Did you know?

You should not take more than 1,000 mg of vitamin E per day. Doses above this amount increase the risk of bleeding problems that can lead to a stroke.

Did you know?

The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.

Cottontails' ears have developed to hear even whisper-quiet sounds at incredible distances. Cottontails' ears have developed to hear even whisper-quiet sounds at incredible distances.
Changing Seasons on Mars Changing Seasons on Mars
Techniques for Measuring Cosmological Distances Techniques for Measuring Cosmological Distances
Average optimal blood pressure for age Average optimal blood pressure for age
The level of emissions from transport in the United States is twice as high as the global average The level of emissions from transport in the United States is twice as high as the global average
The temperature of an average lightning bolt is 3.0 x 104 °C. What is the equiva The temperature of an average lightning bolt is 3.0 x 104 °C. What is the equiva
Video: Energy Flow - Trophic Levels and Food

For a complete list of videos, visit our video library