Answer:
The water is impure
Explanation:
Impurities raises the boiling points and lowers the melting point
Answer: Option B
Explanation:
Dead space is the volume of sir in the body which is inhaled but it does not takes part in the gaseous exchange this is because it does not contains alveoli.
Not all the air that is inhaled inside the body is used in the process of respiration.
The dead space in the lungs is the region which helps in conducting airways, the air is not perfused to the alveoli.
There are about five atoms left after 48,240 years.
<h3>What is Radioactivity?</h3>
Radioactivity is the spontaneous disintegration of an atom to yield daughter nuclei.
Using the formula;
0.693/t1/2 = 2.303/t log No/N
Where;
t1/2 = half life of the atom
No = initial number of atoms present
N = number of atoms at time t
Substituting values;
0.693/24,120 = 2.303/48,240 log 20/N
0.693/24,120 × 48,240/2.303 = log 20/N
33430/55548 = log 20/N
0.60 = log 20/N
Antilog (0.60) = 20/N
N = 20/Antilog (0.60)
N = 5
Learn more about half life : brainly.com/question/6259617