An sb galaxy has an absolute magnitude in the b band of -20.21. estimate the isophotal radius at 30 b- mag arc sec-2. estimate the rotational velocity of the galaxy. estimate the angular rotation speed of a star at the isophotal radius in arcsec /yr.

i think they are all correct

explanation:

they seem good

hypothesising or postulating

0.19 m/s and 0.45 m/s

hello, i am papaguy.

i have found an answer to your question but use it as information.

information: because weak acids/bases have low concentration of hydrogen ions, the addition of water has a large impact on the ph. 2. a difference in 1 unit is a 10x difference in concentration for example; a liquid with ph of 3 is 10x more acidic than a liquid with a ph of 4. therefore, a liquid with a ph of 3 is stronger.

best of luck!