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COVER FISIKA SMA Kls 1.psd

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Berdasarkan tabel Anda peroleh N = 6; x 75,50 ; dan<br />

<br />

2<br />

xi 950,31 .<br />

Selanjutnya dapat Anda tentukan nilai mendekati benda, ketidakpastian,<br />

dan ketidakpastian relatifnya.<br />

i<br />

x<br />

x = 0<br />

N<br />

= 75,50<br />

6<br />

= 12,5833 g<br />

x =<br />

=<br />

=<br />

<br />

2 2<br />

i –( i)<br />

1 N x x<br />

N N –1<br />

2<br />

1 6(950,31) – (75,50)<br />

6 6 – 1<br />

1 5.701,86 – 5.700,25<br />

6 5<br />

= 1 1,61<br />

6 5<br />

= 0,167 × 0,32<br />

= 0,09 g<br />

x Ketidakpastian relatif = 100%<br />

x<br />

= 009 ,<br />

100%<br />

12, 83<br />

<br />

= 0,7%<br />

Menurut aturan yang telah disepakati, ketidakpastian relatif 0,7%<br />

berhak atas tiga angka. Jadi, hasil pengukuran dapat dilaporkan<br />

sebagai berikut.<br />

m = x x<br />

0<br />

= (12,5 ± 0,09) g<br />

<br />

i<br />

Pengukuran<br />

17

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