tentukan luas permukaan bangun di samping! ​

Conduction . . . . .
You put a spoon into a cup of really hot coffee. After a couple of minutes, the top of the spoon is too hot to handle. The spoon CONDUCTED the heat from the hot liquid up to the other end. No material moved. The heat just flowed through the material.
Convection . . . . . You put a pot of cold water on the stove and turn on the heat. The flame heats the water at the bottom of the pot. The heated water rises from the bottom, and cold water from the top sinks to the bottom. Hot fluid rising, cold fluid sinking, that's CONVECTION. Material moved, carrying heat from place to place with it.
Radiation . . . . . -- You come into the house on a cold day, and there's a fireplace burning across the room. Looking at the fire, you feel heat on your face, but not on your back, and the room is still cold. -- The sun produces a lot of heat. Somehow, it gets to the Earth, although there's nothing in space to carry it. -- Heat, light, and radio don't need anything to carry them. They can RADIATE through empty space, as electromagnetic waves. When the waves are heat, they're called Infrared waves.

Answered by AL2006 | 2024-06-10

Heat transfer occurs through conduction (direct contact), convection (fluid movement), and radiation (electromagnetic waves). Each method has distinct mechanisms and examples that illustrate how thermal energy is transferred in different situations. Understanding these concepts is essential in physics and everyday applications.
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Answered by AL2006 | 2024-12-23

Jawaban:hitung menentukan luas permukaan bangun tersebut. Soal:Tentukan luas permukaan bangun gabungan yang terdiri dari dua balok. Cara Penyelesaian: 1. Identifikasi Ukuran Balok:- Balok Kecil:- Panjang = 14 cm - 9 cm = 5 cm- Lebar = 5 cm- Tinggi = 5 cm- Balok Besar:- Panjang = 9 cm- Lebar = 5 cm- Tinggi = 18 cm2. Hitung Luas Permukaan Masing-Masing Balok:- Luas Permukaan Balok Kecil:- 2 * (Panjang * Lebar + Panjang * Tinggi + Lebar * Tinggi)- 2 * (5 * 5 + 5 * 5 + 5 * 5) = 2 * (25 + 25 + 25) = 2 * 75 = 150 cm²- Luas Permukaan Balok Besar:- 2 * (Panjang * Lebar + Panjang * Tinggi + Lebar * Tinggi)- 2 * (9 * 5 + 9 * 18 + 5 * 18) = 2 * (45 + 162 + 90) = 2 * 297 = 594 cm²3. Hitung Luas Permukaan yang Tumpang Tindih:- Luas permukaan yang tumpang tindih adalah luas alas balok kecil, yaitu:- Panjang * Lebar = 5 cm * 5 cm = 25 cm²- Karena ada dua permukaan yang tumpang tindih (bagian atas balok kecil dan bagian bawah balok besar), maka total luas yang tumpang tindih adalah:- 2 * 25 cm² = 50 cm²4. Hitung Luas Permukaan Total:- Luas Permukaan Total = Luas Permukaan Balok Kecil + Luas Permukaan Balok Besar - Luas Permukaan yang Tumpang Tindih- Luas Permukaan Total = 150 cm² + 594 cm² - 50 cm² = 694 cm² Jawaban:Luas permukaan bangun tersebut adalah 694 cm².

Answered by ara1412 | 2025-08-20