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Alla [95]
3 years ago
14

Which of the following are uses for radiation and radioactivity that are of benefit to us?

Chemistry
1 answer:
Kisachek [45]3 years ago
7 0
B. ii only

:) hope that helped
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You are unsure of the volume of a substance, but you know that it has a density of 4 g/ml and a mass of 16 grams. What is its vo
avanturin [10]

Answer:

4 mL

Explanation:

Use the density formula, d = m/v

Plug in the density and mass to solve for v:

4 = 16/v

4v = 16

v = 4

So, the volume is 4 mL

3 0
3 years ago
Type the correct answer in the box. Jay, Kip, and Tia are each measuring the concentration of a solution. They are doing experim
Kryger [21]

Answer:

  • <em>The measurements taken by </em><em><u>Jay</u></em><em> are least likely to contain random errors.</em>

Explanation:

All experimental measures are subject to errors.

Even when the colorimeter is properly calibrated and correctly used, there are random errors.

Random errors are are due to fortuitous factors, such as minor oversight by the observer or small changes of the conditions under which the measurements are made.

You can minimize the random errors by increasing the number of measurements, because the random errors tend to happen in any direction; some measures will be greater and other will be less than the true value.

Chance will make that errors in on direction cancel with errors in the opposed direction, making the average the best measure.

Thus, <em>Jay</em>, by <em>repeating the experiment five times and taking the average measurement</em>, is making that<em> his measurements are</em> <em>least likely to contain random errors.</em>

3 0
3 years ago
Discuss how to separate a mixture of iron filings salt sand and wood chips
SSSSS [86.1K]
The iron filings<span> can be separated with a magnet. The </span>wood chips<span> can be separated by adding water to the water and picking the floating </span>wood chips<span>from the top. The </span>sand<span> can be separated by pouring the water/</span>sand/salt<span>mixture through a coffee filter or a paper towel</span>
6 0
3 years ago
Read 2 more answers
Telescopes are instruments that can magnify<br> very small objects.<br> Truth or false?
lutik1710 [3]
False. that’s a microscope
6 0
3 years ago
Read 2 more answers
Bronze is an alloy. What is an alloy and why are they preferable at times?
Naddika [18.5K]
Alloys are mixtures of metals and other elements, which still keeps many characteristics of metal.

Alloys are sometimes desirable as they have some properties that the original metals don't, for example more flexibility or less fragility. Steel is such an alloy: it prevents movement of iron parts, making it stronger.
6 0
3 years ago
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