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why are objects that fall near earth’s surface rarely in free fall?

a. gravity does not act on objects near earth’s surface.

b. air exerts forces on falling objects near earth’s surface.

c. the objects do not reach terminal velocity.

d. the objects can be pushed upward by gravity.

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