Geography, 04.07.2019 20:10 birdman2540
When astronomers discuss objects that give off light, such as the sun, we discuss a concept called "luminosity" which is measured in units of energy per unit time. typically this is given in "watts", the same unit of power that is used to rate lightbulbs. the luminosity of the sun is l = 3.8 ã 10 26 watts. however, the brightness of a luminous object depends on how far away you are from it. this is called the "flux" by astronomers. flux is calculated using the formula f = l 4 ? d 2 . the flux of light we receive from the sun here at earth (a distance of one astronomical unit or d = 1.5 ã 10 8 km from the sun) is called the "solar constant". it's measured to be f = 1362 watts per square meter. saturn is 10 au from the sun. what is the flux that saturn receives from the sun in watts per square meter? (hint: there is a very simple way to calculate this using "scaling" techniques and realizing that saturn is 10 times further from the sun than the earth.)
Answers: 2
Geography, 23.06.2019 11:20
You have been tasked with sorting the rock samples shown into three categories, with two rocks in each category. what attribute would you use to sort these rocks? which rocks would be in each category? rocks: obsidian, coquina limestone, granite, soapstone,pumice, and gneiss.
Answers: 2
Geography, 23.06.2019 17:20
Which modern technology has not made a great difference in the inuit way of life?
Answers: 2
Geography, 23.06.2019 19:50
Select the correct answer.look at this nineteenth-century illustration of london. which explanation best relates this illustration to changes in britain in the 1800s? a.factory workers in cities lost their livelihood because of the lack of housingb.industrialization narrowed the inccome gap between landowners and workers.c.the migration of workers from rural to urban areas resulted in overcrowded citiesd.the spread of railways allowed farmers to sell produce far from where it was grown.
Answers: 1
Geography, 24.06.2019 01:30
What can happen to solar radiation when it enters earth’s atmosphere? check all that apply. it is absorbed by earth. it is reflected by clouds. it is reflected by glacial ice. it is condensed into visible light. it is amplified by water molecules.
Answers: 1
When astronomers discuss objects that give off light, such as the sun, we discuss a concept called "...
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