Arrange the objects in order from least to greatest potential energy. assume that gravity is constant. (use pe = m × g × h.)
a 15-kilogram stone
found at a height of
3 meters
10 kilograms of water
stored at a height of
9 meters
a 1-kilogram ball located
20 meters in the aira box of books weighing
25 kilograms placed on
a shelf 2 meters high

Determine the age of a fossil if it had only one eighth of its original carbon-14 content remaining?

Heterogeneous mixture with larger particles that never settle is

Cells in the nervous system have a potential difference of 70 mv across the cell membrane separating the interior of the cell from the extracellular fluid. this potential difference is maintained by ion pumps that move charged ions across the membrane. is this an emf? select the correct answer and explanation. 1)no. the ion pumps cannot separate charges; thus, they cannot create a potential difference. 2)yes. the ion pumps cannot separate charges, but they still can create a potential difference. 3)yes. the ion pumps can actively separate charge; thus, they can create a potential difference. 4)no. the ion pumps can separate charges, but they cannot create a potential difference.