Plasmolysed because of osmosis as the salt solution has lower water potential than the cells of the stalk
Half life is the time taken by a radioactive isotope to decay by half its original mass.
The original mass is 200 g
Time taken is 60 hours
Final mass is 25 g
Therefore;
Final mass = Original mass × (1/2)^n; where n is the number of half lives.
25 = 200 (1/2)^n
1/8 = (1/2)^n
n = 3
Three half lives = 60 hours
1 half lives = 20 hours
Therefore; the half life of the radioactive nucleus is 20 hours
The answer is D slippery to the touch
Answer:
coal
Explanation:
fossil fuels are formed by natural process.
The answer is D: 400N
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