How many significant figures does each measurement contain? a) 9457 b)20,000,000,000 c) 0.00007 d) 0.012345

Solutions

Expert Solution

a) In 9457, all are non zero numbers, all non zero numbers are significant therefore in 9457 thereare all 4 significant figures.

b) In 20000000000, first figure(2) is non zero figure. Remaining zeros are non significant. Therefore in given figure, only one singnicant figure. ( number 2 is significant number).

c)Fig 0.00007 contains decimal unit. In this case, we start count significant fig from non zero fig. If any zero Before non zero figure are non singnicant. Therefore, in given figure, 0.0000 are non significant figures and only 7 is significant number. Therefore in given figure, only one significant figure (7).

d) In this case the non zero figures 12345 are only significant figures. Figure before these non zero figure are all non significant.

Therefore in this number, total five significant figures( 12345 ).

queen_honey_blossom answered 1 year ago

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