Answer:
The gravitational potential energy it had from being above the ground is converted to kinetic energy as the rock falls. As kinetic energy increases, the velocity of the rock will also increase. However, if one considers the air, the rock will lose energy as it falls due to air resistance. If the cliff is high enough, the acceleration due to gravity and the air resistance due to the velocity will be exactly equal and there will be no change in kinetic energy.
Explanation:
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K2SO4 + BaBr2 -> 2KBr + BaSO4
BaSO4 is solid = precipitate
Answer:
The number of valence electrons in an atom is reflected by its position in the periodic table of the elements (see the periodic table in the Figure below). Across each row, or period, of the periodic table, the number of valence electrons in groups 1–2 and 13–18 increases by one from one element to the next
It would be 20 km/hr. Because the current and the boat are moving in the same directions, the velocity can be added relative to the shoreline. The shoreline isn't moving so the person looking would see the boat going at 20 km/hr because the current is already making it look like it's going 10 km/hr.
