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4.
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13.
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14.
bayaran =
bayaran =
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7.
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8.
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9.
3 gelombang dalam 1,5 sekon
Semoga membantu :)
Diketahui = Tk = 0K
Ditanya = Tc..?
Jawab = Tc = Tk - 273
= 0 - 273
= -273
Nomor 4
Diketahui = m = 1,5 kg
ca = 4200 J/kgC
U = 2270000 J/kg
Δt = 100 - 30 = 70C
Ditanya = Qtotal..?
Jawb = Q₁ = mcΔt
= 1,5 x 4200 x 70
= 441000
Q₂ = mU
= 1,5 x 2270000
= 3405000
Qtotal = Q₁ + Q₂
= 3846000 J
= 3846 kJ
Nomor 7
Diketahui = w = 3000 N
h = 5 m
s = 15 m
Ditanya = F..?
Jawab = F = h/s x w
= 5/15 x 3000
= 1000 N
Nomor 8
Diketahui = g = 9,8 m/s²
ρ = 1 g/cm³ ⇒ 1000 kg/m³
h = 92 - 52 = 4 cm ⇒ 0,4 m
Ditanya = Ph..?
Jawab = Ph = ρgh
= 1000 x 9,8 x 0,4
= 3920 N/m²
Nomor 9
Diketahui = n = 3 gelombang
t = 1,5 sekon
Ditanya = f...?
Jawba = f = n/t
=3/1,5
= 2 Hz
Nomor 14
Diketahui = Wlampu = 4 x 10 x 10 = 400 ⇒ W₁
Wtelevisi = 1 x 80 x 5 = 400 ⇒ W₂
Wkulkas = 1 x 250 x 24 = 6000 ⇒ W₃
Ditanya = Bayran..?
Jawab = Wtotal = W₁ + W₂ + W₃
= 400 + 400 + 6000
= 6800 Watt ⇒ 6,8 kWh
Bayaran = 700 x 6,8 x 30 = Rp. 142.800,00
Nomor 13
Diketahui = R₁ = 5Ω
R₂ = 5Ω
R₃ = 5Ω
Ditanya = I..?
Jawab
Rs = R₁ + R₂
= 5 + 5
= 10Ω