three students reported the lenghth of a pencil as 12 cm, 12.0 cm, and 12.00 cm. Do they all remain the same?

Answer 1

Uh, you are covering this in a CHEMISTRY class? If not, please post this in the appropriate spot.

Second, this is a very easy question, and one that you should know if you're old enough to post here.

Third, the answer is "no." Each pencil exists in its own time-space continuum, and therefore their length varied accounding to their speed relative to the speed of light. The faster each pencil goes, the short it appears to an impartial observer, even if those students in your example reported them as the same length.

Answer 2

Yes. That is all the same number. No matter how many zeros are after the decimal point there is no difference. The numbers 8, 8.0, and 8.00000000 are all the same. However, the numbers 7.1 and 7.01 are not the same. Zeros before any number after the decimal point DO make a difference.

Answer 3

All three answers are the same. By adding a decimal place you can add as many zeros on the end as you want and still not change the value.

Answer 4

Do they 'all' remain the same?

I thought they measured the length of 'a' (one) pencil.

Or are you asking if the 3 students remain the same?

Answer 5

No, each student is changed and affected in is his or her own personal and unique way as a result of measuring the pencil.

Answer 6

of course they do not.no physical measurement in is 100% correct.
for example the lenght could be 12.0000123 cm

Answer 7

yes they do.. because after the decimal it does not matter how many zeros you put because the number will remain the same..

Answer 8

Yes. Don't ask me why. :)