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ikadub [295]
4 years ago
6

How does a scientist explain something when a controlled experiment cannot be carried out

Chemistry
1 answer:
alina1380 [7]4 years ago
5 0
Usually the controlled experiment is the one that is not tested so they look at the experimental experiment to find the differences. Sorry if this doesn't answer your question.
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Через 100 мл одномолярного раствора гидроксида натрия пропустили 896 мл (н.у.) углекислого
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Round to 2 significant numbers, 5239
ohaa [14]

Answer:

Explanation:

Two sig digits means that 5239 becomes 52 with some zeros behind it. How many?

There were 2 numbers after the 2. So two sig digits would become 5200

If the third digit from the left is a 5 or more then the answer would be

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What is the kinetic energy of a 5 kg object moving at 7 m/s?
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Answer:

122.5 Joule, or 122.5 j

Explanation:

Given,

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velocity of the object (v) = 7 m/s

Kinetic energy = \frac{1}{2} × m × v²

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⇒ \frac{245}{2}

⇒ 122.5 Joule, or 122.5 j

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