Use Table 1 below to answer the following question: Scientists find a piece of wood that is thought to be from an ancient fire c
ircle. They find that the wood contains an amount of carbon-14 (14C) that is approximately 1/16 of the current atmospheric C14 levels. If you started with 1 million carbon-14 atoms, how many atoms would remain in the wood? C14 has a t1/2 of 5,750 years. (Only use numbers in your answer)
Time passed Time passed 14C initially present 14C at end of half-life (half life) (Years) ........................................................................................................................ 0 0 1,000,000 1,000,000
1 5750 ..... 5,00,000
2 11500 ..... 2,50,000
3 17250 ..... 1,25,000
4 23000 ..... 62,500
Since, wood sample contained 1/16 of current atmospheric concentration of 14C. It means that sample has crossed 4 half-life. Number atoms left are 4 half life = 62,500
No matter if you are on Earth, the moon or just chilling in space, your mass does not change. But your weight depends on the gravity force; you would weigh less on the moon than on Earth, and in space you would weigh almost nothing at all.
