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B the practical problems ⑴ how to measure the thickness of a sheet of paper physics textbook A
Title:	B the practical problems ⑴ how to measure the thickness of a sheet of paper physics textbook A
URL:	http://www.quicken2014premier.com/
Description:	a bird in flight B, the aircraft flew to Beijing from Changsha B, He did not land on the specified lawn, 2004. main units and common units: 1 km = 10m 1mm = 10μm 1μm = 10nm 1nm = 10 3333μm 1nm = 10 9m ? ⑷ length estimation: blackboard length 25m desk height 07m basketball diameter 24cm nail width 1cm pencil lead in diameter 1mm the length of a new pencil 175dm palm width 1dm inkwell height 6cm ⑸ special measuring methods: measuring the diameter of fine copper wire the thickness of a sheet of paper such as the tiny amount of the cumulative method used (when the measured length is small lack of precision measuring tools when smaller objects can be built up followed by a scale to measure and then seek have a single length) B the practical problems ⑴ how to measure the thickness of a sheet of paper physics textbook A: The number of sheets of paper to the physical textbook write down the total number of sheets n measured with a millimeter scale thickness n sheets of L then a piece htt

B the practical problems ⑴ how to measure the thickness of a sheet of paper physics textbook A