2. Which of the following best describes the theme of the passage? a. The agricultural revolution changed human food preferences.
b. Some plants today are similar to their ancestors.
c. Farming replaced hunting and gathering.
d. Agricultural communities developed from hunter-gatherer communities, and the
practice of agriculture introduced new environmental problems.

Alarge marble is dropped in a graduated cylinder with 35ml of water in it. the water level increases to 49ml. what is the volume of the marble

Which statement best describes the flow of energy in this scenario

When 13.3 g koh is dissolved in 102.7 g of water in a coffee-cup calorimeter, the temperature rises from 21.4 °c to 31.53 °c. what is the enthalpy change per gram of koh (j/g) dissolved in the water? * take the density of water as 1.00 g/ml. * assume that the solution has a specific heat capacity of 4.18 j/g*k. enter to 1 decimal place. do not forget the appropriate sign /(+). canvas may auto-delete the (+) sign