<h3>
Answer:</h3>
2.5 mg
<h3>
Explanation:</h3>
<u>We are given</u>;
- Original mass of I-131 is 40.0 mg
- Half life of I-131 is 8 days
- Number of days 32 days
We are required to determine the mass that will remain;
N = N₀ × 0.5^n
where, N is the remaining mass, N₀ is the original mass, and n is the number of half lives.
Therefore;
n = time ÷ half life
= 32 days ÷ 8 days
= 4
Therefore;
Remaining mass = 40.0 mg × 0.5^4
= 2.5 mg
Hence, the remaining mass of I-131 after 32 days is 2.5 mg
A freedom struggle (movement) is any organized effort within a society to promote, or attain, liberation or independence, based on social, political, economic, religious, or other ideological grounds.
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Answer:
The angular frequency of the block is ω = 5.64 rad/s
Explanation:
The speed of the block v = rω where r = amplitude of the oscillation and ω = angular frequency of the oscillation.
Now ω = v/r since v = speed of the block = 62 cm/s and r = the amplitude of the oscillation = 11 cm.
The angular frequency of the oscillation ω is
ω = v/r
ω = 62 cm/s ÷ 11 cm
ω = 5.64 rad/s
So, the angular frequency of the block is ω = 5.64 rad/s