The scientific process has to adapt to what the experiment is.
To obtain more accurate values of the densities of the pennies:
- more trials can be conducted to reduces the effect of measurement errors
- more care should be taken in taken volume measurements by displacement of water to avoid splashing of water.
<h3>What is density of a substance?</h3>
The density of a substance is the ratio of the mass of the substance to the volume of that substance.
It is a measure of the compactness of the matter in a substance.
The densities of the pennies made before 1982 was 8.7 g/ml
The actual density of pennies made before 1982 is about 8.8 g/mL.
The densities of the pennies made after 1982 was 6.9 g/ml
The actual density of pennies made after 1982 is about 7.2 g/mL.
Due to several random and experimental errors, the values obtained from the experiment are not exactly the same with the accepted values.
To obtain more accurate values:
- more trials can be conducted to reduces the effect of measurement errors
- more care should be taken in taken volume measurements by displacement of water to avoid splashing of water.
In conclusion, the densities varied as as a result of random and experimental errors.
Learn more about density at: brainly.com/question/1354972
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Explanation:
The chemical elements goes from 30g to 15g to 7.5g to 3.75g.
Therefore, it has gone through 3 half lives.
They would be the following
Mg, Pb, Cu, Ag
