How many dry sand grains are on Earth's beaches?
Guess that the length of Earth's beaches is about twice the
Guess that a sand grain has a radius of about 0.5 millimeter. *** PLEASE ANSWER 6 QUESTIONS BELOW**
All numbers must be entered as, say, 5000 or 5e3 or 5.0e3 and not with commas as in "5,000" and not as fractions as in "3/4" and not> as percentages as in "70%".
1 Estimate the volume of one dry sand grain (in meter3, see Hint). ????
2 Estimate the width (in meters) of a typical beach. ???
3 Estimate the depth (in meters) of a typical beach.
4 Estimate the total length (in meters) Earth's beaches (see Description).
5 Estimate the volume (in meter3) of Earth's beaches.
6 Estimate the number of dry sand grains on Earth's beaches.
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