How did Galileo show that gravity is a constant acceleration and not different for each object? 1. He watched pendulums swing and recorded their speed and weight.
2. He shot two arrows straight into the sky and watched them fall.
3. He dropped two objects with different masses from the Tower of Pisa.
4. He rolled hundreds of different balls down the same hill and recorded their speeds.

hm

Explanation:

1he watched pendulum swing and

i think the answer is c, rivers.

explanation:

sometimes, borders fall along natural boundaries like rivers or mountain ranges. for example, the boundary between france and spain follows the crest of the pyrenees mountains. for part of its length, the boundary between the united states and mexico follows a river called the rio grande. the borders of four countries divide africa’s lake chad: niger, chad, cameroon, and nigeria.

tenochtitlan (also spelled tenochtitlán), located on an island near the western shore of lake texcoco in central mexico, was the capital city and religious centre of the aztec civilization. the traditional founding date of the city was 1345 ce and it remained the most important aztec centre until its destruction at the hands of the conquering spanish led by hernán cortés in 1521 ce, which led to the final collapse of the aztec empire.