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victus00 [196]
3 years ago
15

Mohammed listed the steps that occur when a solar cell generates electricity.

Biology
2 answers:
Katyanochek1 [597]3 years ago
4 0

Answer:

A.) Switch steps 2 and 3

Explanation:

I took the test and I got it right

nydimaria [60]3 years ago
4 0

Answer:

Switch steps 2 and 3

:

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Explain how parasitism differs from commensalism.
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Wood deposits recovered from an archaeological site contain 36% of the C-14 they originally contained. How long ago did the tree
Veseljchak [2.6K]

Answer: It was obtained 8515 years ago

Explanation:

Expression for rate law for first order kinetics is given by:

t=\frac{2.303}{k}\log\frac{a}{a-x}

where,

k = rate constant

t = age of sample

a = let initial amount of the reactant

a - x = amount left after decay process  

a) to find the rate constant:

Half life is the amount of time taken by a radioactive material to decay to half of its original value.

t_{\frac{1}{2}}=\frac{0.693}{k}

k=\frac{0.693}{5760}=0.00012years^{-1}

b) for completion of 36% of reaction

t=\frac{2.303}{k}\log\frac{100}{36}

t=\frac{2.303}{0.00012}\log\frac{100}{36}

t = 8515 years

The time was 8515 years.

3 0
3 years ago
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