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Virty [35]
3 years ago
7

Jared is practicing for a golf tournament. His normal driver distance is 250 yards. He hits three balls with his driver, and the

y travel a distance of 190 yards, 195 yards, and 187 yards. Which of the following is true?
His drives are precise but not accurate

His drives are accurate but not precise

His drives are neither precise not accurate

His drives are both accurate and precise
Chemistry
1 answer:
Nutka1998 [239]3 years ago
4 0

Answer:

His drives are neither precise not accurate

Explanation:

It is true that his drives are neither precise nor accurate.

Accuracy is the exactness of measurement. It is the closeness of measured values to the true values.

In this problem, the true value is 250 yards, the measured values are 190 yards, 195 yards and 187 yards.

We can conclude that these numbers are very far from the true values. By virtue of that, they are inaccurate.

Precision is the ability to reproduce a set of experimental values. It is the closeness of the measured values to one another.

Jared failed to replicate his measured values over the three trials and so, his readings are not precise.

Therefore, his measurements are both imprecise and inaccurate.

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hope this helps

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7 0
4 years ago
Which of the following is an acid? HF KOH LiF NH3
seraphim [82]

The compound HF is an acid. This is because it dissociates in water to give hydrogen ions (H⁺) as the only positively charged ions.

The others dissociate as follows: NH₃  reacts with water to form an alkaline solution NH₄OH.

LiF dissolves to form an ionic solution

KOH dissociates in water to form an alkaline solution.

3 0
3 years ago
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If you are trying to pipet an unknown liquid with a pipetman and the liquid keeps running out of the tip before you can transfer
irina1246 [14]

Answer:

This is due to the physical properties of the sample, since it affects the volume dispensed.

Explanation:

For example, in the case of very dense samples, selected samples to adhere to the surface of the tip, dispensing more slowly. In contrast, ethanol samples are less viscous and more volatile and are dispensed more rapidly. Some of the ways to minimize these inconveniences are the use of ultra low retention pipette tips, since they have a hydrophobic plastic additive that prevents the liquid from adhering to the inside of the tip.

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6 0
4 years ago
A solution of ammonia and water contains 2.60×1025 water molecules and 6.90×1024 ammonia molecules. how many total hydrogen atom
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1 molecule H2O of has 2 atoms of H.
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2.07*10²⁵ + 5.20 *10²⁵ =7.27*10²⁵ atoms of H altogether.
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lyudmila [28]
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3 years ago
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