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3 years ago

Please i need help !!!☹️

Biology

1 answer:

Pavlova-9 [17]3 years ago

6 0

Answer: C. 9

Explanation:

Gestation refers to the time between when a baby is conceived till the baby is delivered. This is why the period of pregnancy is known as the <em>Gestation Period. </em>

During that time and after the fertilized egg implants itself in the uterus, the baby develops and grows until it is ready to be delivered.

The structure this occurs in is the uterus (womb) which is labelled 9 in the structure above.

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3 years ago

Fat globular are released by the bone and travel to the? Select all that apply:

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2 years ago

The hip bone of a whale and the appendix of a human are referred to as ______because they have little current importance but wer

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2 years ago

Please help i dont undrstand

yulyashka [42]

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3 years ago

Read 2 more answers

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