Significant Figures
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A) Provide the type of measurement (volume, length, temperature etc.) for the following units:
i) 298 K
ii) 65 mL
iii) 15 m
iv) 290 kg
v) 50 g
b) Write the following measurements in scientific notation:
i) 150000000 kg
ii) 0.28 L
iii) 0.00004 m
c) Answer whether the numbers in each of the following statements is measured or exact:
i) The Cambrian explosion occurred 545000000 years ago.
ii) 26 students went for the field trip.
iii) The number of microbes on a telephone is 25600.
d) State how many significant figures there are in each of the following measured quantities:
i) 18.000 m
ii) 52.80 L
iii) 7.0 X 10-14 kg
e) Round off each of the following numbers to two significant figures:
i) 66.666
ii) 0.0063424
iii) 9577
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Solution Summary
Answer goes down a sort list of problems and deals with issues such as significant figures, rounding, and math as related to science in general.
Solution Preview
Please see attached file.
Solution is below, and as HTML attached - provided a couple of links that are live in the HTML page version.
As for "help", I am going to point you to the resources you need to answer these yourself, and put in an example or two - but NOT to do them for you, OK? So let's go then!
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a) Provide the type of measurement (volume, length, temperature etc.) for the following units:
i) 298 K
ii) 65 mL
iii) 15 m
iv) 290 kg
v) 50 g
go to the following site and look at the entries for metric and SI units, should be easy enough
http://www.ex.ac.uk/cimt/dictunit/dictunit.htm#SI
b) Write the following measurements in scientific notation:
i) ...
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