410 Answered Questions for the topic astronomy

Astronomy Error Analysis

05/06/17

If three measurements have different errors, what is the error of the mean of the three measurements?
For my astronomy coursework, I need to work out the sidereal day and the error of this value. Since I repeated the observation 3 times, I have 3 values for the sidereal day each with a different... more
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05/06/17

If you decrease the distance between two celestial objects by a factor of 3.5, how does the resultant gravitational force between the two objects compare to the
If you decrease the distance between two celestial objects by a factor of 3.5, how does the resultant gravitational force between the two objects compare to the original force? The force is ______... more
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Astronomy So Hard Eisten

05/06/17

A comet is discovered that has an orbital period of 105 years. Determine the average distance of this comet from the Sun in AU
A comet is discovered that has an orbital period of 105 years. Determine the average distance of this comet from the Sun in AU
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Astronomy

05/06/17

which of the following is not part of the solar surface or solar atmosphere?
which of the following is not part of the solar surface or solar atmosphere?magnetosphere, chromosphere, photospehere corona
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Astronomy Math Physics

04/22/17

The schwarzchild radius of a black hole containing 7.95 x 10 ^ 28 kg is ___ meters
The schwarzchild radius of a black hole containg 7.95 x 10 ^ 28 kg is ___ meters
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04/22/17

Astronomy difficult question. star velocity
light is gathered from a distant star and one of the spectral lines is obeserved at 540 nm when it should be 400 nm. The velocity of this star is ____km/sOnly enter your numerical answer don't... more
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Astronomy

04/18/17

quasars and distances
What is the minimum size of a quasar that shows variations in brightness over a period of 36 hours? Express your answer in kilometers. 
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Astronomy

04/17/17

What is the minimum size of a quasar that shows variations in brightness over a period of 36 hours?
Express your answer in kilometers.
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Astronomy Physics

04/14/17

What Is Singularity ?
How did it come to mind that, it is in blackhole ?  What about its properties?  
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Astronomy

03/23/17

What is the Doppler effect? Give some familiar examples of the Doppler effect, and then specifically address the question of what property of stars can we learn
What is the Doppler effect? Give some familiar examples of the Doppler effect, and then specifically address the question of what property of stars can we learn about from the Doppler effect and... more
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Astronomy Science

03/23/17

Why does a shooting star light up in the sky?
A. Because nuclear fusion occurs inside the meteor’s trail B. Because the air surrounding the meteor bursts into flames C. Because the air molecules combine with the molecules of the meteor D.... more
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Astronomy Science

03/23/17

Why does a shooting star light up in the sky?
A.Because nuclear fusion occurs inside the meteor’s trail  B.Because the air surrounding the meteor bursts into flames  C.Because the air molecules combine with the molecules of the meteor ... more
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Astronomy Science Space Meteors

03/23/17

Why are meteorites so valuble cosmic samples
A. Because they represent some of the youngest material in our Solar System B. Because they can tell us more about the other planets in our Solar System C. Because they represent material from... more
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Astronomy

03/10/17

a procedure done under controlled conditions to test a hypothesis is an inquiry
a procedure done under controlled conditions to test a hypothesis is an inquiry
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Astronomy

12/02/16

The mass of man is 90kg; if he lost 25kg, how would his inertia change?
A. His Inertia would not change B. His Inertia would increase C. His Inertia would decrease D. It is Unknown how his inertia would change 
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Astronomy Astrophysics

11/30/16

I am having trouble with this astronomy question
According to the present estimates, the Universe is about ______ years old.     A.14 × 107 B.14 × 109 C.14 × 105 D.14 × 1011
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Astronomy

11/15/16

if a giant star 100 times the diameter of the sun, is 1 parsec from earth, what would its angular diameter be?
If a giant star 100 times the diameter of the sun, is 1 parsec from earth, what would its angular diameter be?  
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Astronomy Algebra 2

09/13/16

In a vacuum,the wavelength of light from a laser is 630 nm. What is the frequency of the light!?
I just really need help in astronomy
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09/13/16

Astrophysics question
Object A emits most strongly at 400 nm, while object B emits most strongly at 800 nm. What can we say about their relative temperatures? A’s temperature is the same as B’s.Nothing. Temperature is... more
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Astronomy Physics Astrophysics

09/12/16

I have a physics/astronomy question
What’s a black hole? What’s the difference between a reflecting and refracting telescope?
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Astronomy Physics

09/12/16

Blackk hole questtion
What’s a black hole? What’s the difference between a reflecting and refracting telescope?
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Astronomy

09/05/16

At local noon the sun is 4 degrees west of a certain star, the next day at local noon what will be the position of the sun relative to the same star?
The possible answers are: in front of the star 4 degrees east of the star 4 degrees west of the star 3 degrees west of the star 3 degrees east of the star
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08/23/16

Vijay the plumber put in an new bathroom for us. he charges 2200 pounds plus 17 and a half percent VAT. what was the total we paid?
I need to know how much we all paid and how much is 17 and 1/2 percent VAT. Is it add or times or is  all of the formulas.
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Astronomy

06/15/16

weins law help
According to Wien's Law, how many times hotter is an object whose blackbody emission spectrum peaks in the blue, at a wave length of 450 nm, than a object whose spectrum peaks in the red, at 700... more
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Astronomy

03/29/16

astronomy -please
?-The questions in this homework quiz all refer to the following graph: http://www.up-00.com/VERzSCdj   It shows a black body spectrum for an imaginary star. (In reality, while real stars do... more
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