metric system. general physics

1.Briefly describe the history of the metric system as it applies to the meter and how the definition of a meter has changed over time.

2.Contrast the metric units of distance, time, and speed. Describe the relationship between them.

3.A microbiologist measures the speed of a swimming bacterium. The bacterium covers a distance of 2.16 microns in 5.0 seconds. The biologist wished to compare the speed of the bacteria with other animals, but the speeds of other animals are listed in kilometers per hour. What is the speed of the bacterium in kilometers per hour? (1 micron = 1 x 10^–6m) Use scientific notation and express your answer to the correct number of significant figures.
You must show your work for full credit.

4.Name three different kinds of graphs that are often used to plot information and discuss the value of each.

5.Explain what chart junk is and how it differs from the kind of items you should include in your graphs. Provide four examples. 

 

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