Kak bantuin kerjain no 27&30 sama caranya ya kak plisss.... Question from @rikamd121

izharulhaq78 $27.$
$f=20cm \\ M=2\times \\ s_i=xcm \\ \\ s_o=? \\ \\ M=| \frac{s_i}{s_o}| \\ 2=| \frac{x}{s_o}| \\ 2=\frac{x}{s_o} \\ 2s_o=x \\ \\ \frac{1}{s_o}=\frac{1}{f}-\frac{1}{s_i} \\ \frac{1}{s_o}=\frac{1}{f}-\frac{1}{x} \\ \frac{1}{s_o}=\frac{1}{f}-\frac{1}{2s_o} \\ \frac{1}{s_o}+\frac{1}{2s_o}=\frac{1}{f} \\ \frac{2}{2s_o}+\frac{1}{2s_o}=\frac{1}{20} \\\frac{3}{2s_o}=\frac{1}{20} \\ \frac{3}{s_o}=\frac{1}{10} \\ 10\times3=s_o \\ 30cm=s_o$

$28.$
$v=2\frac{1}{4}\times10^8m/s=\frac{9}{4} \times10^8m/s \\ c=3\times10^8m/s \\ \\ n=? \\ \\ \\ n= \frac{c}{v} \\ n= \frac{3\times10^8}{ \frac{9}{4}\times10^8} \\ n= \frac{3}{ \frac{9}{4}} \\ n=3\times\frac{4}{9} \\ n=\frac{4}{3}$

$29.$
$\text{C. Tepat di titik fokus}$

$30.$
$s_i=30cm \\ s_o=20cm \\ \\ f=? \\ \\ \frac{1}{f}=\frac{1}{s_i}+\frac{1}{s_o} \\ \frac{1}{f}=\frac{1}{30}+\frac{1}{20} \\ \frac{1}{f}=\frac{2}{60}+\frac{3}{60} \\ \frac{1}{f}=\frac{5}{60} \\ f}=\frac{60}{5} \\ f=12cm$

0 votes Thanks 1

lazuardirahman 30. 1/f = 1/si + 1/so
1/f = 1/30 + 1/20
1/f = 2/60 + 3/60
1/f = 5/60
f = 12 cm jawabannya b.

27. M = si/so
2 = si/so
2 so = si

1/f = 1/si + 1/so
1/20 = 1/2so + 1/so
1/20 = 1/2so + 2/2so
1/20 = 3/2so
2 so = 20 × 3
2 so = 60
so = 30 jawabannya d.

0 votes Thanks 1

Kak bantuin kerjain no 17&20.. ya pliss makasih yang udah ngejain

Kakak jawabin nomer 24 & 25 pliss dengan carannya

Plis dongk kakak kakak bantuin aku.. ngerjain... pake cara nya juga dongk

Tolong dongk kak traslitkan pliss

Traslitkan dongk kak ... plissss

Traslitkan ka bahasa inggriss dong... pliss bantu kak

Kakak tolong dong kerjain plisss kaka

Tolong dong kak dibantu ngerjainnya

Tolong kerjain no 7 ajh pliss

Tolong kerjain dong tugasku ini plisss

Recommend Questions

Life Enjoy

Get in touch

Social