answer the questions? short answer

This assignment is to get familiar or refresh your knowledge about systems of measurement units. Reading, watching video then answering assignment questions.

Please post your answers in the posting field not in comments! There is no need to upload or attach any files.

Total 3 pts.

Instructions:

1 Reading the definitions of units at https://physics.nist.gov/cuu/Units/current.html can you guess which one is determined by a particular physical object? Explain reasoning for your guess.

(In case the nist.gov site is unavailable please use: https://www.mathsisfun.com/measure/index.html and read about metric and standard systems)

2 Then watch https://www.youtube.com/watch?v=ZMByI4s-D-Y to find which unit out the seven base units is in fact determined by a single object in the universe? Did you make a good guess?

3 Discuss why in the video for the round object they picked a sphere and not some other shape, any practical reasons?

4 Watch: https://www.youtube.com/watch?v=PXiyqWnixqo and then https://www.youtube.com/watch?v=SsULOvIWSUo .Give examples from the videos for practical reasons to have accurate measure of time over the centuries

Solution Preview

The unit of a mass, kilogram, is the one determined by a particular physical object. The kilogram refers to the unit of mass that is equal to the global prototype of the kilogram. I guessed this unit because the stability of a kilogram is a critical aspect given that it is a value used in determining other units.

After watching the video, I found that the unit that is determined by a single object in the universe is the Kilogram. Having been first defined as a grave, it was the international prototype used to measure objects.

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