What was the name given to low-cost multi-family dwellings in the cities in the late 1800s

How did the growth of the middle class affect social reform during the industrial revolution?

“i now wished for the last friend, death, to relieve me.” what is equiano referring to?

Ascientist performs an experiment where she measures the mass of a piece of metal, pours acid onto the metal, washes the metal, and then re-measures the mass of the metal. the scientist repeats the experiment several times, each time increasing the amount of acid used. the dependent variable in the experiment is the: initial mass of the metal final mass of the metal amount of acid used washing the metal