Who attempted to measure the relative distance to the moon and the sun plz !

(apex) when a cup of water is dropped, as the cup falls, the water in the cup falls out true or false?

Solutions of sodium carbonate and silver nitrate react to form solid silver carbonate and a solution of sodium nitrate. a solution containing 3.50 g of sodium carbonate is mixed with one containing 5.00 g of silver nitrate. how many grams of sodium carbonate, silver nitrate, silver carbonate, and sodium nitrate are present after the reaction is complete?

Connect the whole numbers on the periodic table to indicate what they represent?