Question

An Astronomer needs to determine the volume of gas in a star. She makes several measurements of the star's diamenter and gets and average value of 521678.9 km with a standard derivation of 679.56 km.

what is the value that she should report for the diameter of the star? Using the format D +/- lowercasedelta D, rounded appropiately.

If the volume of the star is V=(4pi/3)(R^3). What is the expected uncertainty in the calculated voulume of the star? Do not round!

Give the volume of the star in a V +/- lowercasedeltaV format and round appropiately.

A second astronomer determines the volume of the star to be (7.41 +/- 0.05) * 10^25 m^3. Are the volumes of the astronomers consistent? Why or why not?

The real volume of the start is 7.436 * 10^25 m^3. Which of the measurements is more accuarate, and which one is more precise? Explain the reasoning!

Answer #1

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