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Yuliya22 [10]
3 years ago
14

Two jars are placed on a counter with a McDonald's French Fry inside, one has a lid, the other does not. They are left alone to

see which one decays faster, after 2 days the fry in the closed jar looks fresher. What is the independent variable? What is the dependent variable? What is the control variable?
Chemistry
1 answer:
Agata [3.3K]3 years ago
7 0

Answer: days

Explanation: controlled variable is that they put it in 2 jars for 2 days one with a lid and one with no lid. dependent is how long it was there (2) days. Independent is you left it in one place for the whole 2 days. i think.

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4 outer planets in order
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Jupiter, Saturn, Uranus, Neptune, Jovian... is your answer. 
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2 years ago
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A scientist digs up sample of arctic ice that is 458,000 years old. He takes it to his lab and finds that it contains 1.675 gram
Fiesta28 [93]

Answer:

6.70 grams of krypton-81 was present when the ice first formed

Explanation:

Let use the below formula to find the amount of sample

N= N_0(\frac{1}{2})^n

where

n = \frac{t}{t_{\frac{1}{2}}}

here

t =  458,000 years

t_{\frac{1}{2}} = 229,000

\frac{t}{t_{\frac{1}{2}}} = \\frac{ 458,000}{229,000}

n = \frac{t}{t_{\frac{1}{2}}} = 2.000

Now substituting the values

1.675 = N_0(\frac{1}{2})^{2.000}}

1.675 = N_0\times (0.2500)

N_0= \frac{1.675}{0.2500}

N_0=6.70

3 0
3 years ago
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Dahasolnce [82]

Answer:

<h3>Which of the following increases with the increase in the temperature in case of a liquid?</h3><h2><em>Va</em><em>pour</em><em> </em><em> </em><em>Pressure</em><em> </em></h2>

Explanation:

When a closed container contains liquid, higher the temperature, higher the evaporation the evaporation will be.

So Vapour Pressure should be the correct answer.

6 0
2 years ago
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Answer:

true

Explanation:

we have many sattelites that are seen by many astounouts in space by telescope but more than half space is not discoverd

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