Question

1Which is the heavier metal of these two?
2Who invented time?
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Answer 1

Answer:

1. osmium and iridium

Osmium and iridium are the densest metals in the world, but relative atomic mass is another way to measure "weight." The heaviest metals in terms of relative atomic mass are plutonium and uranium.

2.ancient Egypt

The measurement of time began with the invention of sundials in ancient Egypt some time prior to 1500 B.C. However, the time the Egyptians measured was not the same as the time today's clocks measure. For the Egyptians, and indeed for a further three millennia, the basic unit of time was the period of daylight.