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Lady bird [3.3K]
3 years ago
13

Explain if the efficiency of a machine can ever be greater than 100%?

Chemistry
2 answers:
Zarrin [17]3 years ago
7 0
No because a 100% efficiency means the machine is working at its best.
Marizza181 [45]3 years ago
3 0
You should download Socratic with a good app!
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You use a balance to find the mass of a folded newspaper. Then you run it through a shredder. Predict its mass after being shred
sashaice [31]
Bello,

I think the answer is A

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~Girlygir101~
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4 years ago
If an instrument has 10 ml td +/- 0.01 ml written on it, the user should ..... question 5 options: record 10 ml in the notebook
galina1969 [7]

Answer : The correct option is "record 10.00 ml in the notebook after using it."

Explanation :

If an instrument has "10 mL TD" written on it, that means the instrument is meant To Deliver (TD) 10 mL of volume.

Therefore the option that has 5.00 mL is not correct.

"+/- 0.01 mL" indicates the precision of the instrument. We know that no measurement is 100% accurate and there is always some uncertainty associated with any measurement.

Here, 0.01 indicates the uncertainty in the measurement.

When we have 0.01 mL , that means the instrument can record precisely to the hundredths place.

The more the significant figures, the greater is the accuracy of the measurement.

Therefore when we use an instrument that has "+/- 0.01 mL" written on it, we should record the reading as 10.00 mL  


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3 years ago
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1. An encounter with the barrier

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Explanation:

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I. The solubility of NaCl at 25 degrees C would be between the solubilities at 20 and 30 degrees C. A reasonable answer would be 36 grams/100 g water
ii. From the table, it’s clear that the salts are more soluble at higher temperatures, indicating that an increase in temperature increases solubility.
iii. At 50 degrees C, a saturated ammonium chloride solution will have 50.6 grams of salt per 100 g water. At 20 degrees C, the solution can hold only 37.3 grams of salt per 100 g water. Thus, 13.3 grams of salt will precipitate per 100 grams of water.
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4 years ago
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