TOLONG KERJAKANSebuah pemanas listrik digunakan untuk memanaskan air sebanyak 2 liter ( 2 liter air = 2 kg air) dari suhu 20°C sampai mendidih selama 10 detik. Tentukan daya listrik yang digunakan alat pemanas listrik !​

11-3 and 11-4 are both the same problem. Only the names and the numbers are changed, but the process is exactly the same in both problems.
11-3) . If Andy joins the health club, he will pay $34.50 every month. How many months are in year ? Over here where I come from, we get 12 months each year. Andy will pay $34.50 twelve times. All together, he will spend (12) x ($34.50) = $414 on membership.
11-4) . Julie rides her bike 5 times a week. 34.75 miles on Monday 34.75 miles on Tuesday 34.75 miles on Friday 34.75 miles on Saturday 34.75 miles on Sunday. How many 7 total miles does she ride each week ?
(5) times (34.75) = **173.75 miles **

Answered by AL2006 | 2024-06-10

In Problem 11-3, Andy will spend $414 on a health club membership over a year. In Problem 11-4, Julie rides a total of 173.75 miles each week on her bike. Both problems involve simple multiplication to find the total cost or total distance.
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Answered by AL2006 | 2025-04-12

Jawaban:hitung daya listrik yang digunakan alat pemanas listrik tersebut. Diketahui:- Massa air (m) = 2 kg- Perubahan suhu (ΔT) = 100°C - 20°C = 80°C- Waktu (t) = 10 detik- Kalor jenis air (c) = 4200 J/kg°C Rumus yang digunakan:1. Kalor yang dibutuhkan (Q):Q = m × c × ΔT2. Daya (P):P = Q / t caranya: 1. Hitung kalor yang dibutuhkan:Q = 2 kg × 4200 J/kg°C × 80°CQ = 672000 J2. Hitung daya:P = 672000 J / 10 sP = 67200 W Jadi, daya listrik yang digunakan alat pemanas listrik adalah 67200 Watt atau 67,2 kW.

Answered by ara1412 | 2025-08-24