Question

Tolong kerjain ya pakai jalan nya juga

Answer 1

24. TI 1 mobil = 80 -> TI 10 mobil = 90 dB
TI 1 motor = 60 -> TI 100 motor = 80 dB
caranya pake rumus TI2 = TI1 + 10 log n
*mobil = TI2= 80 + 10 log 10
= 80 + 10 × 1 = 90
*motor = TI2= 60 + 10 log 100
= 60 + 10×2 = 80
perbandingannya 10 mobil:100 motor = 90:80= 9:8 (E)
26. d × y/L = n ~
0,2 × 10^-3 × 5×10^-3/1 = 2× ~
1 × 10^-6= 2~
~ = 1 × 10^-6/2 = 0,5 × 10^-6 -> m = 10^9 nm = 500 nm
@y = n ~ L/ 2d
= 2×500×10^-9×1/2 × 0,2 × 10^-3
= 1000 × 10^-9/ 0,4 ×10^-3
= 1×10^-6 / 4× 10^-4 = 0,25 ×10^-2 m = 0,0025×1000= 2,5 mm
28. C. 10 cm d sblh kiri A, kalo yg ini pake rumus q1/q2 = (r1/r2)^2 tpi gampangnya pake pemahaman aja, kalo yg d tax q, r nya dkuadrat, kalo yg dtanya r, besar perbandingan qnya d akarkan. kalo perbandingannya dpt 1:2, r2=r1, 1:3, r2=1/2r1
29. B
Sorry kalo ada yg salah.. :)