It decreased because of the Black Plague
Answer:
The answer is A
Explanation:
Took the test and got it right.
The answer is eons, eras, and periods.
A period is a basic unit in geology. Two or more periods form an era. Two or more eras form an eon. For example, Phanerozoic is the eon. It consists of three eras. These eras are Paleozoic, Mesozoic, and Cenozoic. Paleozoic is the era that consists of five periods. These periods are Cambrian, Ordovician, Silurian, Devonian, and Permian.
<span>The most important feature for a chemical storage area is chemical compatibilities. Incompatible substances must not be stored together. </span><span>Common storage problems can lead to mixing incompatible chemicals which is hazardous. The most serious of these problems is the storage of inorganic acids with flammable substances</span>
Answer:
The correct answer is -
A) 35 g
B)30 mL
C)1.66666666666667g/ml3
Explanation:
Given:
mass of graduated cylinder containing 40 mL = 60 g
volume of water = 40 ml
increase in the level of water = 70 ml
increase in mass = 95
Solution:
A) mass of object -
increased mass - initial mass
90 - 60 = 35 g
B) volume of object
increased volume - initial volume
70 - 40 = 30 mL
C) density d=m/v
d=35/30
d=1.66666666666667
