Ultimate cosmology quiz

[BrainForce]

Suppose-

Newtonion gravity said that it's sun's gravity causing planets to revolve if it disappears suddenly at that very moment planets will leave orbits and will move tangentially.

:confused: What's wrong with Mr.Apple in his idea.:doh:

first to answer will have an 16th cent. apple free.:lol:

[Tormod]

Action at a distance.

[ronthepon]

Suppose-

Newtonion gravity said that it's sun's gravity causing planets to revolve if it disappears suddenly at that very moment planets will leave orbits and will move tangentially.

:confused: What's wrong with Mr.Apple in his idea.:doh:

first to answer will have an 16th cent. apple free.:lol:

Information cannot travel faster than the speed of light.

 

So, the effect cannot be felt instantly.

[BrainForce]

Rightly said:thumbs_up

Now another Mr.Apple problem:confused:

 

Which rotates faster pulsar or a magnetar?:confused:

Also tell the law of physics applying on it.

If you do answer ,please ask a question too ,to keep continuity in thread.

 

Quiz is "answer a question ,leave a question" type

[Jay-qu]

I think its a magnatar, like the name suggests it has a large magnetic field but I am unsure if this is cause of the spin, or result..

 

question: What is the closest star to our solar system?

[Jay-qu]

Al, the avatar is a public one, I will see what I can do about getting it removed from the list but in the mean time pipe down ok, hes just a new guy and probably didnt intentionly use the same avatar as you.. its just a cool avatar.

[Tarantism]

question: What is the closest star to our solar system?

 

Proxima Centauri

 

What is the Hubble Constant?

[BrainForce]

What is the Hubble Constant?

Tarantism I think its value is 72 megaparsec/sec.It is a constant to calculate radial velocity of a galaxy,Generally it is it denoted by H(0)subscript,velocity=hubble c0ns.*distance from us.

 

Now.Mr.Apple problem,

From which part of solar system do comets belong?

[Jay-qu]

Proxima Centauri

 

What is the Hubble Constant?

I will take that as an answer, but it is in dispute whether it is infact a star! It is very small..

 

The hubble constant is a number that reflects the speed at which the universe is expanding at a given distance from us, [math]H_0[/math] has units km/s/Mpc. Currently accepted values range between 50 and 100 km/s/Mpc

 

oh and the inverse of [math]H_0[/math] gives an approx age to the universe ;)

[Tarantism]

Brain, are you talking about our solar system? i think that would be the astroid belt yeah?

 

What is the name of a large (1,000 times larger than the largest galaxy we see) gravitational lump in the universe whose nature is hidden by the milky way?

[Tarantism]

oh and the inverse of [math]H_0[/math] gives an approx age to the universe ;)

 

i didnt know that...

 

The most recent calculation of the constant, using the satellite WMAP began in 2003, yielding a value of 71±4 (km/s)/Mpc. As of the 2006 data, that figure has been refined to 70 (km/s)/Mpc, +2.4/-3.2

[Jay-qu]

Now.Mr.Apple problem,

From which part of solar system do comets belong?

That would be the Kuiper belt and possibly even the Oort cloud for extremely long period comets;)

[Tarantism]

That would be the Kuiper belt and possibly even the Oort cloud for extremely long period comets;)

dernit cledus! so does that void my question?

[UncleAl]

What is the Hubble Constant?

 

http://map.gsfc.nasa.gov/m_uni.html

http://map.gsfc.nasa.gov/m_uni/uni_101bbtest.html

http://nedwww.ipac.caltech.edu/level5/March01/Carroll/frames.html

[Jay-qu]

dernit cledus! so does that void my question?

I do not understand.. :hihi:

[Tarantism]

what i meant was, i answered the previous question incorrectly, and then, thinking i had the correct answer like a fool i asked a question, per the rules of the thread. i suppose i was trying to figure out if my question was going to be answered....i like it.

 

ah, i hope for clairity :hihi:

[Qfwfq]

I will see what I can do about getting it removed from the list but...

I disagree, I've proposed the admins remove it from Unk's profile (and leave it available to all). This is the second time he has complained about someone choosing the same one and I don't see why he should be heeded.

 

Unk, if you want your own exclusive, copyright avatar then design one yourself, as I did. Only then you can complain if someone else has the nerve to use it.