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November 29, 2014

Search: Physics - mass of a galaxy

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Physics - mass of a galaxy
A star at the edge of the Andromeda galaxy appears to be orbiting the center of that galaxy at the speed of about 200km/s. The star is about g*10^9AU from the center of the galaxy. Calculate a rough estimate of the mass of the Andromeda galaxy. Earth orbital radius is 1.40*10^8
December 4, 2010 by Farah

Science need help ?????///
An astronomer observes two galaxies, A and B, which have redshifts of: Galaxy A = 0.020 and Galaxy B = 0.010. Which galaxy is closest to us and what is its distance away from us? You may assume that the Hubble constant is H0 = 75 km s–1 Mpc−1 and that the speed of light ...
April 14, 2013 by sam

Physics
A star of mass 2.0 1028 kg that is 1.6 1020 m from the center of a galaxy revolves around that center once every 3.4 108 years. Assuming that this star is essentially at the edge of the galaxy, each of the stars in the galaxy has a mass equal to that of this star, and the ...
February 16, 2007 by winterWX

physics
A star of mass 2.0 1031 kg that is 4.8 1020 m from the center of a galaxy revolves around that center once every 4.2 108 years. Assuming that this star is essentially at the edge of the galaxy, each of the stars in the galaxy has a mass equal to that of this star, and the ...
July 16, 2010 by Sam

physics
The sun rotates around the center of the milky way galaxy at a distance of about 30,000 light years (1ly= 9.5*10^15m). if it takes about 200 million years to make one rotation, estimate the mass of our galaxy. Assume that the mass distribution of galaxy is concentrated mostly ...
October 25, 2008 by jason

Cosmology
magine you look through a really strong telescope and see a rich cluster. Your telescope is so good that you can see a single galaxy at the center of the cluster. What can you say about that galaxy and be pretty confident that you are correct? It has mass smaller than that of ...
March 1, 2013 by C

Physics
Our Milky Way galaxy is very similar to our neighboring galaxy Andromeda. Consider that each galaxy contains approximately 4.0 x 10^11 stars each star having an average mass of 2.0 x 10^30 kg. a. If the gravitational pull of Andromeda is 2.4 x 10^30 N, how far away is ...
January 4, 2013 by Robby

physics
astronomical observations of our milky way galaxy indicate that it has a mass about 8.0 *10^13 times the mass of our sun. a star orbiting on the galaxy edge is about 6.0*10^4 light years a way from the galactic center what is the orbital period of that star in earth year
March 9, 2014 by Mohanad

Astronomy
A galaxy is receding away from us with a recession velocity of 100,000 km/s. What is the distance to this galaxy? What is the redshift z of this galaxy?
June 24, 2014 by qwerty

Physics
The Hubble Space Telescope (HST) has recorded evidence of a black hole at the center of the M87 galaxy. Using Doppler data, it's been measured that matter is orbiting the center of this galaxy at an orbital speed of 7.5x10 5 m/s, out at a radius of 5.7x10 17 m. Calculate the ...
July 26, 2012 by Zac

Astronomy
Supernovae can eject material at velocities of 0.001c. Will gas ejected by a supernova which occurs inside a dwarf galaxy with a mass of 10^8 Msolar and a radius of a few kpc be able to escape the galaxy? Yes or No
June 24, 2014 by qwerty

Cosmology
What observations were used by Edwin Hubble to show that the universe is expanding? - The distance to a galaxy is proportional to its luminosity. - The distance to a galaxy is inversely proportional to its apparent size. - The distance to a galaxy is proportional to its ...
January 8, 2013 by qwerty

Physics
Please help me solve this! The spectrum of the sodium atom is detected in the light from a distant galaxy. If the 590.0 nm line is redshifted to 658.5 nm, at what speed is the galaxy receding from the Earth?
August 11, 2010 by Brian

Astronomy
Which event is likely to trigger rapid growth in supermassive black hole mass? -A merger of two gas-rich galaxies. -Direct collisions of stellar-mass black holes in collapsing globular clusters. -Tidal disruption of a dwarf elliptical galaxy by a large elliptical galaxy. -A ...
March 16, 2013 by qwerty

simple PHYSICS!!!
The sun goes around the center of our galaxy once every 250 million years. The sun is also 2.55×10^20 m from the center of our galaxy. What is the acceleration of our sun towards the center of the galaxy in m/s^2?
March 20, 2013 by please..anyone help!!

Physics!
The sun goes around the center of our galaxy once every 250 million years. The sun is also 2.55×10^20 m from the center of our galaxy. What is the acceleration of our sun towards the center of the galaxy in m/s^2?
March 18, 2013 by please..anyone help!!

physics
The sun goes around the center of our galaxy once every 250 million years. The sun is also 2.55×10^20 m from the center of our galaxy. What is the acceleration of our sun towards the center of the galaxy in m/s^2?
March 21, 2013 by rohit

Astronomy - help!
Imagine that you have obtained spectra for several galaxies and have measured the observed wavelength of the H emission line of atomic hydrogen. The rest wavelength of H is 656.3 nanometers (nm). Your results are as follows: • Galaxy 1: Observed H wavelength is 664.7 nm • ...
November 29, 2008 by anonymous

Physics
The sun goes around the center of our galaxy once every 250 million years. The sun is also 2.55×10^20 m from the center of our galaxy. What is the acceleration of our sun towards the center of the galaxy in m/s^2? Details and assumptions You may assume the sun's orbit is ...
March 22, 2013 by Jack

science
which of the statements below is true? a) the stars in a galaxy are held together by gravity b) Stars in a galaxy slowly rotate around a center c) The Milky Way is the only galaxy in the universe d)All of the above just need to know if my answer is correct or wrong d
August 16, 2010 by ant

astronomy
Imagine that you live in a distant galaxy far far away. This galaxy is in a different universe, and so may have different cosmology. It seems that in this distant universe, all galaxies have the same luminosity, which you have worked out is 7.0*10^30 W. You are studying a ...
April 11, 2014 by keitanako

Astronomy
Given that the mass of the Milky Way galaxy is 10^11 times that of the Sun and that the sun is 2.6x10^20 meters from its center, what is the Sun's orbital speed around the center of the galaxy? How long does it take the Sun to orbit the Milky Way? (In this problem, we assume ...
April 10, 2007 by Manny

maths
the galaxy we live in is roughly lens shaped,and pins.its diameter is given inlight years. (1 light year=9.5Exp12km) calculate the circuference or our galaxy in kilometres. the earth is at a point 3Exp4 light yaersfrom the centre.How far does the earth travel in one turn of th...
August 23, 2008 by jade

Cosmology
The single largest uncertainty in the measurement of the Hubble constant using gravitational lenses comes from uncertainty of... * the distance to the lensing cluster or galaxy. * the mass distribution of the lensed quasar. * the distance to the lensed quasar. * the mass ...
January 16, 2013 by qwerty

unsolved mysteries astrophysics
Q3.2 COLLAPSE TIMESCALE (5 points possible) Imagine that you live in a distant galaxy far far away. This galaxy is in a different universe, and so may have different cosmology. It seems that in this distant universe, all galaxies have the same luminosity, which you have worked...
April 15, 2014 by JuanPro

Physical Science
Galaxy A is 600 million light years from earth. Galaxy B is moving away from the earth at a speed that is 80% as large as that of Galaxy A. How far from earth is Galaxy B? A. 750 million light years. B. 640 million light years. C. 540 million light years. D. 480 million light ...
October 27, 2011 by Anonymous

science
The sun goes around the center of our galaxy once every 250 million years. The sun is also 2.55×1020 m from the center of our galaxy. What is the acceleration of our sun towards the center of the galaxy in m/s2?
March 18, 2013 by ayan

ASTRONOMY
In which type of galaxy would you most likely to observe a massive star supernova – in a giant elliptical or in a large spiral galaxy? Explain
November 29, 2008 by anonymous

Astronomy
The apparent brightness of a Cepheid variable star in a far-away galaxy is measured to be 640,000 times fainter compared to an equivalent star 2,000 light years away from the Sun in our Galaxy. Assuming that there is no light absorption between galaxies, what is the distance ...
November 20, 2010 by Anonymous

science
How does the mass of all the interstellar matter in our galaxy compare with the total mass of its stars?
December 5, 2011 by Shirley

Physical Science
How does the mass of all the interstellar matter in our galaxy compare with the total mass of its stars?
December 3, 2011 by Shirley

Physical Science
How does the mass of all the interstellar matter in our galaxy compare with the total mass of its stars?
December 4, 2011 by Shirley

cosmology
We observe a galaxy at z = 1, and a quasar at z = 2. What is the redshift of the quasar as observed from that galaxy? Enter a numeric answer.
January 19, 2014 by simar

Science-8th Grade
5. Volume is an object is how much ________ it takes up. 6. When we measure the temperature of an object in the metric system, we use _______ 7. Scientist say that measuring mass of an object means measuring how much matter something has. What is matter? 8. You are a space ...
September 29, 2008 by Joy

Physics--please help!!
A hydrogen atom, when vigorously perturbed, can emit light with a frequency of 6.16·1014 Hz. When the same light from hydrogen atoms in a distant galaxy is observed on earth, the frequency is 5.76·1014 Hz. Calculate the speed at which the galaxy is receding from the earth (in ...
May 6, 2013 by Kelly

physics
A hydrogen atom, when vigorously perturbed, can emit light with a frequency of 6.16 × 1014 Hz. When the same light from hydrogen atoms in a distant galaxy is observed on earth, the frequency is 5.21 × 1014 Hz. Calculate the speed at which the galaxy is receding from the earth...
May 18, 2011 by Joan

cosmology
A galaxy with an apparent magnitude in the V band (λc ~ 5550 angstroms, width δλ ~ 800 angstroms) of mV = 22.5 mag is observed with the Palomar 200-inch telescope. How many photons per second are collected from this galaxy over the 200-inch (~ 500 cm) diameter ...
January 19, 2014 by simar

science
An average diameter of a star is approximately 109 m and an average diameter of a galaxy is 1021 m. Considering the given data, apply a sense of scale calculation to determine if when a galaxy’s diameter is scaled down to the length of Manhattan (21.6 km long), would the star ...
October 10, 2011 by Aly

physics??
Two newly discovered planets follow circular orbits around a star in a distant part of the galaxy. The orbital speeds of the planets are determined to be 41.3 km/s and 52.7 km/s. The slower planet's orbital period is 7.74 years. (a) What is the mass of the star? (b) What is ...
February 15, 2011 by Gina

Science
with 1*10 to the power of 22 stars in the sky. List several factors that limit us to being able to see only about 2000 to 3000. *shape of the galaxy *size of the galaxy *The sun's light *light reflection from earth *light pollution *lackness of darkness *horizon view Are these...
February 22, 2010 by Sara

Science
with 1*10 to the power of 22 stars in the sky. List several factors that limit us to being able to see only about 2000 to 3000. *shape of the galaxy *size of the galaxy *The sun's light *light reflection from earth *light pollution *lackness of darkness *horizon view Are these...
February 22, 2010 by Sara

Science 4
Most stars probably formed A.alone B.in intergalactic space, then were swept up into the Galaxy C.in clusters in the Galaxy's spiral arms D.from planetary nebulae E.in the galactic Nucleus, then migrated outward later I'd guess roughly C ...but im no scientist. check this out ...
November 7, 2006 by Liz

Science
Which distance is the greatest ? A. The distance across the Milky Way Galaxy. B. The distance to the nearest star Cluster. C. The distance across the solar system. D. The distance to the nearest Galaxy.
January 30, 2012 by Natalie

physics
The galaxies in the universe are all flying away from each other. The speeds of nearby galaxies are proportional to the distance the galaxy is away from us. This relation, v=Hd is known as Hubble's law and the constant H is known as Hubble's constant. The evolution of our ...
May 23, 2013 by hrdcvrdcv

Physics
When you look at a distant galaxy through a telescope, how is it that you're looking backward in time?
February 22, 2008 by Nikki

Physics
The wavelength of light emitted from a distant galaxy by a hydrogen atom is observed to be 400 nm. If it is known that the laboratory wavelength of this light emitted by hydrogen is 380 nm, what is the velocity of the galaxy? (a) .135c away from Earth (b) .135c toward Earth (c...
November 4, 2011 by Arielle

Astronomy
A quasar is observed at a redshift of z=1, which corresponds to a comoving radial distance of 3 Gpc. Its observed bolometric flux is 10^{-12} erg/cm^2/s. An interacting companion galaxy is seen 4 arcsec apart in projection. What is the bolometric luminosity of the quasar, in ...
June 19, 2014 by qwerty

English
Astronomers Ferraro and Newman study the speed of the stars circling the galactic center of the galaxy. Identify the appositive or appositive phrase. galaxy Astronomers the galactic center Ferraro and Newman
November 18, 2014 by Deja

physics 1
Two newly discovered planets follow circular orbits around a star in a distant part of the galaxy. The orbital speeds of the planets are determined to be 43.6 km/s and 63.5 km/s. The slower planet's orbital period is 8.36 years. (a) What is the mass of the star? (b) What is ...
March 3, 2014 by Anonymous

College Physics
Two newly discovered planets follow circular orbits around a star in a distant part of the galaxy. The orbital speeds of the planets are determined to be 43.5 km/s and 54.0 km/s. The slower planet's orbital period is 6.53 years. (a) What is the mass of the star? (b) What is ...
March 15, 2012 by Angela

college physics 1
Two newly discovered planets follow circular orbits around a star in a distant part of the galaxy. The orbital speeds of the planets are determined to be 35.1 km/s and 63.3 km/s. The slower planet's orbital period is 6.74 years. (a) What is the mass of the star? (b) What is ...
March 5, 2014 by anonymous

Science
The galaxies in the universe are all flying away from each other. The speeds of nearby galaxies are proportional to the distance the galaxy is away from us. This relation, v=Hd is known as Hubble's law and the constant H is known as Hubble's constant. The evolution of our ...
May 20, 2013 by Abhishek Ranjan

Science
with 1*10 to the power of 22 stars in the sky. I can't put 22 in small form above 10, so that's why I'm wording it by saying to the power. So: with 1*10 to the power of 22 stars in the sky. List several factors that limit us to being able to see only about 2000 to 3000. *shape...
February 22, 2010 by Sara

physics
How would one plug the gravitational constant into an equation? To be honest, I'm having a hard time with the idea of the gravitational constant in general, but I need to solve an equation for the circular velocity of a galaxy. I know I need to multiply the gravitational ...
March 8, 2012 by Grace

Language arts
The boys on the soccer team will go across the street, through the valley, and into the park. What is the adjective phrase? Beyond that hill sits a house without a roof. adverb phrase is millions of stars form a galaxy,and between any two stars there are light years of space. ...
September 10, 2012 by completeidiot

Physics help
The galaxies in the universe are all flying away from each other. The speeds of nearby galaxies are proportional to the distance the galaxy is away from us. This relation, v=Hd is known as Hubble's law and the constant H is known as Hubble's constant. The evolution of our ...
May 23, 2013 by SOmebody

physics
What is the radius of the event horizon (or Schwartzchild radius) of approximately 4 million solar masses at the center of our galaxy? A. 1200 m; B. 12*10^6 km; C. 12*10^9 km; D. 12*10^12 km.
December 30, 2013 by Alice

science
The brightest galaxy in the Bootes cluster of galaxies is found to have a redshift of 0.13. (Assume the speed of light, c, is 3.0 × 10 8 m s−1.) (i) Assuming the Hubble constant, H0, is 70 km s−1 Mpc−1 to two significant figures, calculate the distance to ...
August 22, 2011 by mj

physics 213
Two newly discovered planets follow circular orbits around a star in a distant part of the galaxy. The orbital speeds of the planets are determined to be 44.7 km/s and 56.2 km/s. The slower planet's orbital period is 8.61 years. (a) What is the mass of the star? (b) What is ...
February 19, 2012 by Erin

Calculus
Astronomers have a mathematical model for the orbital speed of the stars as a function of their distance x from the center of the galaxy: V(x) = 350x/(1+(x^2))^(3/4) where x = 1 for 10,000 light years, x = 2 for 20,000 light years. At a distance of 10,000 light years, the ...
January 24, 2012 by Scooby10

Science
I need to now in order which of these are big in order from biggest to smallest: Moon, Whirlpool Galaxy, Hubble Deep Feild Galaxies, Hubble Space Telescope, Pleiades Star, Cluster, Saturn Sun Then the distance from closest earth to the farthest in order: Moon, Whirlpool Galaxy...
January 10, 2007 by Anonymous

space
what kind of galaxy is the milky way?
May 20, 2008 by frank

science
what color are the coolest stars in the galaxy
June 2, 2008 by kristin

Physics Plz help me
If a galaxy is traveling away from us at 2.0% of the speed of light, roughly how far away is it? t= light years I got 2.4x10^8 light years but its wrong please help me out...thank you Physics Plz help me - Anon, Monday, May 6, 2013 at 9:17pm 5.98x10^6 Thatz still wrong
May 7, 2013 by Leila

SCIENCE
WHAT IS THE DIFFERENCE BETWEEN THE ARRANGEMENT OF A CONSTELLATION AND A GALAXY?
January 28, 2009 by KIKI

space
If the diameter of a galaxy is 243.3 kpc, how many meters is that?
August 23, 2011 by Anonymous

Science
What is a galaxy with no definite shape or size called?
May 13, 2012 by Ginny

English IV
Would this work for a thesis on Douglas Adams: Douglas Adams used Proto Science Fiction to write The Hitchhiker’s Guide to the Galaxy and uses satirical tone when discussing politics. welcome :) that's good you might want to be more spacific in what kinds of polotics or events...
July 6, 2007 by Summer

science
does the stars in a galaxy slowly rotate around a center.
March 22, 2011 by shakiyla

Physics
Using the scale (1 light-minute equals 10 mm), how many millimeters represent a light year? On this scale, what is the distance from Earth to the nearest star? To the Andromeda Galaxy? (Note that 1 meter = 103 mm and that 1 km = 103 meters.)
August 30, 2013 by vv

Cosmology
What explains the observation that galaxy clustering is stronger at higher redshifts, which is an apparent reversal of the trend out to about z ~ 1? It is difficult to measure peculiar velocities Rich clusters have more galaxies than poor clusters Density contrast seems to ...
March 1, 2013 by C

space
does our solar system move in the milky way galaxy?
January 27, 2008 by Isaac

social studies
could you pl let me know the distinction between galaxy and milkyway in solar system
February 8, 2013 by r s telagathoty

Science
If a galaxy is 1,000 Mpc away, how fast isit recending?
November 19, 2013 by Harold

Astrophysics
The Earth formed at a redshift of z∼0.53. That means that when our world was young, the universe was quite a bit smaller than it is today. The nearest galaxies to our own are around 10 kpc (kilo-parsecs) in size, lie at a distance of around 1 Mpc from us (Mega-parsecs), ...
April 12, 2014 by Anonymous

Physics Plz help me
If a galaxy is traveling away from us at 2.0% of the speed of light, roughly how far away is it? t= light years I got 2.4x10^8 light years but its wrong please help me out...thank you
May 6, 2013 by Leila

science
do you know the word galaxy shaped like a wheel whithout cured arms
April 19, 2012 by Kandy

Astronomy
What about a for a supernova in an elliptical galaxy of 10^12 solar masses and radius of 50 kpc? Yes or No
June 24, 2014 by qwerty

physcs
Two newly discovered planets follow circular orbits around a star in a distant part of the galaxy. The orbital speeds of the planets are determined to be 41.8 km/s and 64.6 km/s. The slower planet's orbital period is 8.84 years. (a) What is the mass of the star? (b) What is ...
October 21, 2014 by S

Physics
A star rotates in a circular orbit about the center of its galaxy. The radius of the orbit is 6.2 x 1020 m, and the angular speed of the star is 4.3 x 10-15 rad/s. How long (in years) does it take for the star to make one revolution around the center?
October 30, 2012 by Maggie

physics
A star rotates in a circular orbit about the center of its galaxy. The radius of the orbit is 4.4 x 1020 m, and the angular speed of the star is 7.3 x 10-15 rad/s. How long (in years) does it take for the star to make one revolution around the center?
July 16, 2013 by simon

physics
The linear momentum of a body can be calculated by multiplying its mass by the Question 1 options: time during which the mass moves. distance the mass moves. acceleration of the mass. velocity of the mass. Save
February 10, 2013 by nicole pierre

physics
The linear momentum of a body can be calculated by multiplying its mass by the Question 1 options: time during which the mass moves. distance the mass moves. acceleration of the mass. velocity of the mass. Save
February 10, 2013 by nicole pierre

physics
Spaceman Spiff sits just outside the Milky Way galaxy with a cup of liquid Helium which is at approximately 4K (-269 0C). He has with him a small sphere made entirely of copper which is at a temperature of 219K (-54 0C). After a certain amount of time his copper sphere comes ...
April 27, 2010 by gian

conceptual physics
The linear momentum of a body can be calculated by multiplying its mass by the Question 1 options: time during which the mass moves. distance the mass moves. acceleration of the mass. velocity of the mass. Save
February 10, 2013 by nicole pierre

SCIENCE
WHICH OF THESE IS A PART OF OUR SOLAR SYSTEM? GALAXY -BLACK HOLE- PULSAR- STAR
December 26, 2008 by KITA

Science
What would you estimate to be the speed of a galaxy located 60 million light-years away?
May 4, 2009 by Rosa

Physics
A 0.25 mass is located on the outer edge of a wheel of radius 0.75 m that is turning at a rate of 2 revs/s. Determine the following: 1) The period of the mass 2) The angular speed of the mass in rad/s c) The tangential speed of the mass d) The centripetal acceleration of the ...
December 13, 2009 by Monika

Physics
two point masses are located in the same plane. the distance from mass 1 to the center of mass is 3.0m. The distance from mass 2 to the center of mass is 1.0m. What is m1/m2, the ratio of mass 1 to mass 2?
March 29, 2011 by Jacob

Physics
it is estimated that light travels 100 000 years to travel the full distance across our galaxy, the milky way. If light travels 3.0x10^8 m every second, how long is the Milky Way? (1year=3.2x10^7s)
September 25, 2012 by Hafiza

physics
You know that you can safely stand on the hang-over end of a heavy plank that rests on a table. How far depends on your mass and the mass of the plank. Suppose you can stand on the end of a plank that overhangs the edge of the supporting table 1/4 its total length. Then how ...
July 22, 2008 by Claire

space science
how long does it take for our solar system to rotate around the Milky Way galaxy?
November 19, 2007 by Anonymous

English
In the book HitchHikers Guide to the Galaxy, what are good examples of where the reader might feel curiosity and sympathy? Thank you.
October 18, 2008 by Achilles

Physical Science
Both galactic nebulas and globular clusters occur in our galaxy. Distinguish between them.
December 3, 2011 by Shirley

Please help!!!!!Physics
Find the resultant force on (a) the mass m1 = 0.183 kg and (b) the mass m2 = 0.106 kg (the masses are isolated from the earth).. The first mass is 400kg and its 10 cm from the second mass which is 0.183 kg (m1). the second mass is 10 cm away from the third mass which is 0.106 ...
September 29, 2011 by kellie

Math
The Andromenia Spiral is a galaxy 2,200,000 light years from Earth. write this distance in scientific notation
July 22, 2008 by Nathaniel

physics
A .1kg mass is located on the line between a 5kg mass and a 10kg mass. It is 4m to the right of the 5kg mass and 6m go the left of the 10kg mass. What is the magnitude and direction of the net force on the .1kg mass?
November 17, 2011 by Jen

Science
The name of the galaxy which contains our sun is the a) Big Dipper b) Milky Way c) universe d) Orion e) solar system b
August 16, 2010 by babe

astronomy
How fast must a spaceship travel to reachthe center of the Galaxy (26,000 ly away) in 100 years "ship time"?
March 5, 2012 by Linda

Science
What units of measurement do you use to measure the earth to... 1. Moon 2. Galaxy 3. Sun 4. Communication satellite 5. Pluto 6. Proxima Centauri
February 23, 2013 by Abbey

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