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dem82 [27]
3 years ago
13

In which of Piaget’s stages would a child be if the child has just developed object permanence?

Chemistry
2 answers:
PSYCHO15rus [73]3 years ago
8 0

Answer:

C

Explanation:

rodikova [14]3 years ago
7 0

Answer:

preoperational

Explanation:

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A candle is 10 cm high and 2 cm in diameter physical or chemical property​
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Determine the charge on the unknown ion, X, in the compound Nax.
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2 years ago
An artifact contains one-fourth as much carbon-14 as the atmosphere. how old is the artifact
Nikolay [14]
<h3><u>Answer;</u></h3>

= 11,460 years

<h3><u>Explanation;</u></h3>
  • <em><u>The half life of Carbon-14 is 5,730 years . Half life is the time taken by a radioactive material to decay by half of its original mass.  Therefore, it  would take a time of 5730 years for a sample of 100 g of carbon-14 to decay to 50 grams</u></em>

<em>The initial amount of carbon-14 in this case was 1 whole; thus; </em>

<em>1 → 1/2 →1/4</em>

<em>To contain 1/4 of the value, 2 half-lives have passed. </em>

<em>But, 1 half life = 5,730 years</em>

<em>Therefore; The artifact is is therefore: 2 x 5,730 </em>

<em>          = 11,460 years </em>

4 0
2 years ago
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CORO<br> Name three ways that scientists can ensure their results<br> are reliable
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Reliability. When a scientist repeats an experiment with a different group of people or a different batch of the same chemicals and gets very similar results then those results are said to be reliable. Reliability is measured by a percentage – if you get exactly the same results every time then they are 100% reliable.

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Sorry, I only got one way.

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