your body and nature is about human life
Let’s scientists learn more about the environment and how the world works
Answer:
I can only see the very first one and it only needs a rotation. Can you add pics of the others.
Explanation:
Answer:
2.5 mg
Explanation:
<em>The half-life of a substance is the time required for one half of the substance to decay. In order words, it is the time it will take for a substance to decay into half of its initial size.</em>
For a 20 mg element with a half-life of 30 which decays over a period of 90 years;
The first 30 years, 10 mg would have decayed, remaining 10 mg
The second 30 years, the remaining 10 mg would have decayed to 5 mg
The third 30 years, 5mg would have decayed to 2.5 mg.
Hence, in 90 years, 20 mg of the element would <u>remain only 2.5 mg.</u>
Answer:
D. they will burst
Explanation:
Since the surrounding medium has more water content, the cells will take in water. After some time the cell membrane will burst.
