28. How many one dollar notes would you have to stack to reach the moon? Would that be cheaper than building and launching a spacecraft? (Hint: Start by folding a one dollar note to see how many thicknesses make 1.0 mm.)
28. How many one dollar notes would you have to stack to reach the moon? Would that be cheaper than building and launching a spacecraft? (Hint: Start by folding a one dollar note to see how many thicknesses make 1.0 mm.)
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