Which is heavier 1kg of feathers or 1kg of stones?

they both are the same amount

the correct answer is the following is a list of inventions made in the medieval islamic world, especially during the "islamic golden age" (8th to 13th centuries),[1][2] as well as the late medieval period, especially in the emirate of granada and the ottoman empire.

science and technology in the islamic world adopted and preserved knowledge and technologies from contemporary and earlier civilizations, including persia, india, china, and greece-roman antiquity, while making a number of improvements and innovations.

the packers and the chiefs played in the first super bowl, which was held in los angeles in 1967. -is the sentence that would stand out the most when scanning a paragraph.