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4 years ago

How does the precision of measurements affect the precision of scientific calculations?

1 answer:

3 0

<span>The precision of scientific calculations is limited by the measurement that's the least precise out of all the measurements used in the calculation. When considering significant figures, the last answer should have the least significant figures out of all the measurements that entered into account and were able to be done with the most significant figures that could be directly measured. So, as more precise we are in measurements, more precise can be the final answer to a scientific calculation.</span>

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A steel bar has a mass of 4,000 kilograms and a volume of 0.5 cubic meters . Calculate its density. Write your answer as a whole

mixer [17]

The equation for density is:

$D=\frac{m}{V}$

where the mass is in grams and the volume is in $cm^{3}$ .

We are given 4,000 kilograms, and we know that there are 1,000 grams in 1 kilogram, so we need to multiply to convert to grams:

$4,000*1,000=4,000,000g$

We are also given 0.5 $m^{3}$ , and we need to convert to $cm^{3}$ . We know that there are 100 cm in 1 m, and since we are talking about cubic volume, we must also raise 100 to the 3rd power: $100^{3}=1,000,000cm$ . So now we know that there are 1,000,000 $cm^{3}$ in 1 $m^{3}$ . We need to then multiply 1,000,000 cm by 0.5 in order to find the volume that was given in the question:

$1,000,000*0.5=500,000cm^{3}$

So now that we have the correct units, let's plug them into the equation:

$D=\frac{4,000,000g}{500,000cm^{3}}$

$D=\frac{8g}{cm^{3}}$

So now we know that the density is 8g/cubic centimeter.

3 0

3 years ago

Which structure of a paramecium holds a reserve copy of all a cells genes?

hjlf

A. The micronucleus...

4 0

3 years ago

Read 2 more answers

What did you include in your response? Check all

Delicious77 [7]

Each kernel of corn receives one allele from

each parent for the traits of color and texture.

Option B

<h3><u>Explanation:</u></h3>

Corn kernels are actually the seeds of corn. Corn kernels are formed because of the fertilization of both the Pollen and the ovule of the corn plants. This pollens and the ovules are formed by means of meiosis which takes different alleles of the same gene from both the parents and both the chromosomes of each parents. This is why during meiosis the events of crossing over and independent assortment leads to the variation of characters into the offspring. This is why the kernel colours of the the same ear of the corn remains same. This is how the corn plant receives the the kernel colours from both the parents and their colours remain constant for one particular ear. Also the gene of texture is achieved from both the parents by means of meiosis just like the corn colour. So there also independently assorted.

5 0

3 years ago

Biological systems examples that can be found during a nature walk, such as cellular respiration

Alex

You can also find photosynthesis, the carbon cycle, the water cycle and others

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2 years ago

Is Decomposition a fast change that happens in an ecosystem?<br><br> (true or false)

vodka [1.7K]

Decomposition is not a fast process. There are 5 steps to it. So in this case it would be FALSE.

4 0

4 years ago