The mass of one atom would best be measured in this unit:
2 answers:
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Answer:
Two Half-lives
Explanation:
Let number of Parent nuclei Initially present be X,
Then, finally Parent nuclei Will remain with
daughter nuclei.
In one half- life , parent nuclei becomes half of initial.
So, starting with X parent nuclei,
After one half-life, it will degrade to .
After another half life , Parent nuclei will become half of
Which is equal to .
So, Parent nuclei have to go through Two half-lives.
Answer:
2.87 liter.
Explanation:
Given:
Initially volume of balloon = 4.3 liter
Initially temperature of balloon = 350 K
Question asked:
What volume will the gas in the balloon occupy at 250 K ?
Solution:
By using:
Assuming pressure as constant,
V∝ T
Now, let K is the constant.
V = KT
Let initial volume of balloon , = 4.3 liter
1000 liter = 1 meter cube
1 liter =
4.3 liter =
And initial temperature of balloon, = 350 K
Let the final volume of balloon is
And as given, final temperature of balloon, is 250 K
Now,
Dividing equation 1 and 2,
K cancelled by K.
By cross multiplication:
Now, convert it into liter with the help of calculation done above,
Therefore, volume of the gas in the balloon at 250 K will be 2.87 liter.