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Seberkas sinar  menembus aluminium setebal 10 cm. ...

Seberkas sinar begin mathsize 14px style alpha end style menembus aluminium setebal 10 cm. Jika koefisien pelemahan aluminium
0,094 begin mathsize 14px style cm to the power of negative 1 end exponent end style, intensitas sinar begin mathsize 14px style alpha end style setelah keluar dari bahan ini sebesar... 

  1. 35% 

  2. 39%

  3. 42% 

  4. 45%  

  5. 49% 

Jawaban:

Diketahui:
table attributes columnalign right center left columnspacing 0px end attributes row size 14px x size 14px equals cell size 14px 10 size 14px space size 14px cm end cell row size 14px mu size 14px equals cell size 14px 0 size 14px comma size 14px 094 end cell end table 

Ditanya:
begin mathsize 14px style I over I subscript o equals ? end style 

Jawab

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell I over I subscript o end cell equals cell open parentheses 1 half close parentheses to the power of fraction numerator x over denominator H V L end fraction end exponent end cell row cell I over I subscript o end cell equals cell open parentheses 1 half close parentheses to the power of fraction numerator x over denominator begin display style fraction numerator 0 comma 693 over denominator mu end fraction end style end fraction end exponent end cell row cell I over I subscript o end cell equals cell open parentheses 1 half close parentheses to the power of fraction numerator 10 over denominator fraction numerator 0 comma 693 over denominator 0 comma 094 end fraction end fraction end exponent end cell row cell I over I subscript o end cell equals cell open parentheses 1 half close parentheses to the power of 1 comma 35 end exponent end cell row cell I over I subscript o end cell equals cell 0 comma 39 cross times 100 percent sign equals 39 percent sign end cell end table end style 

Jadi, jawaban yang benar adalah B

0

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