After two half-lives or 60 years, 7.5 g of the element will be left.
<u>Explanation:</u>
<u>Half-life:</u>
- In simple words, Half-life can be defined as the amount of time needed for a quantity to fall to half its value as contained at the beginning of the time period.
- In this problem the half-life of the element is thirty years, then after thirty years half of the sample would have decayed and half would be left as it is.
- After thirty years (The first half-life ) 30 /2 = 15 g declines and 15 g remains disappeared.
- And after another sixty years (The two half-lives) 15 /2 = 7.5 g declines and 7.5 g remains disappeared.
- After two half-lives or 60 years, 7.5 g of the element will be left.
Answer:
c.Racquetball
because the lighter the object the more force it needs to go
It is maybe or maybe it isn't
Answer:Gg and Gg
Explanation:G - Grey
g - Black flies
G is dominant over g . GG × gg
Answer:False
Explanation:
This is false since light energy is needed for photosynthesis to take place. ... Animals are capable of respiration, but not photosynthesis.
Hope this helped!