elliptical galaxies ate known as social as they are often found in groups and very much enjoy “hanging out” with other ellipticals in crowded situations. It is precisely in this crowd that collisions are most likely to happen
spiral Galaxies are known as 'shy' as they are more likely to be found in poor clusters or on the edges of rich clusters where collisions are less likely to disrupt the spiral arms or strip out the gas needed for continued star formation.
Why are ellipitical galaxies known as “social” and spiral galaxies know as “shy”?
Stars in elliptical galaxies move like the bulge or halo stars in spiral galaxies. a. Why can’t the rotation curve method to determine mass be used for elliptical galaxies? b. Masses of elliptical galaxies are often derived from their velocity dispersions. This part illustrates how a velocity dispersion can be determined: The intrinsic line-width of a K giant star might be 0.5 Å at a central wavelength λ0 = 5000 Å. Suppose an elliptical galaxy is observed which has a...
Galaxies of type___________ show a smooth disk/halo structure, but without spiral arms.
Which of the following is true concerning the motions of stars in spiral galaxies: stars in the bulge have nearly circular orbits, stars in the disk have nearly circular orbits stars in the bulge have nearly circular orbits, stars in the disk have random orbits stars in the bulge have random orbits, stars in the disk have nearly circular orbits stars in the bulge have random orbits, stars in the disk have random orbits
Jestion 6 Stars farther out in the disks of spiral galaxies seem to orbit the galaxy center faster than expected. This leads scientists to wonder if there may be a. Redshift b. Antimatter c. Dark energy d. Dark matter Moving to the next question prevents changes to this answer: 30 MacBook Pro FU 15 F7 % &
Question 8 What is the strength reduction factor of tied and spiral columns? Please explain why the ACI code assigns a higher strength reduction factor to spiral columns compared to tied columns.
Why are most galaxies in the center of galaxy clusters “elliptical” and harbor only old stars, while their intracluster space is filled with extremely hot gas? Name three reasons.
1. Why is it unexpected when a spiral galaxy has a flat rotation rate? How does neutrinos help solve this oddity?
Match the “muckraker” to the social issue for which they are best
known.
Question 20.18 - Level 2 Unanswered Match the “muckraker" to the social issue for which they are best known. O Hold and drag to reorder Ida B. Wells Racial violence Lincoln Steffens Industrial workers' welfare Upton Sinclair Political corruption 3 attempts left. Submit
LP 5. (20 pts) It is known that most of the mass of galaxies is some exotic material that doesn't interact with light or normal matter. Let's assume that this "dark matter" is due to a new elementary particle---alaskonium. Like Alaska in the winter, alaskonium in the galaxy is cold and dark. We will assume that alaskonium is a fermion and that it is so cold that it is degenerate; a gravitationally bound, nonrelativistic, degenerate gas. Take the total mass...
1/ Sirius A has a luminosity of 9.98 x 10^27 W and a surface temperature of about 9400K. What is its radius? A/ r = 7.56 x 10^8 m B/ r = 1.34 x 10^9 m C/ r= 1.26 x 10^13 m D/ r = 7.94 x 10^-14 m 3/ which of the following stellar properties is the most fundamental to a star’s main-sequence and post-main sequence life? A/ temperature B/ mass C/ luminosity D/ radius 4/ Stars Moppit and...