Quiz 1:   Fullscreen Mode Theory of Moments Theory of Moments What is a Moment? The moment of a force is the turning effect produced by a force acting at a distance from a pivot or fulcrum. It depends on: The magnitude of the force (\(F\)) The perpendicular distance (\(d\)) from the line of action of the force to the pivot The formula for calculating the moment is: Moment (\(M\)) = Force (\(F\)) × Perpendicular Distance (\(d\)) Unit: Newton meter (Nm) Law of Moments The law of moments states that for a system in equilibrium: Sum of Clockwise Moments = Sum of Anticlockwise Moments This means there is no net turning effect on the body. Conditions for Equilibrium A body is in equilibrium when: The sum of all forces acting on it is zero (no net force). The sum of all moments about any point is zero (no net moment). Examples and Applications Example 1: Balanci...

Pencemaran Lingkungan: Dampak dan Upaya Pencegahan Pencemaran lingkungan merupakan masalah serius yang dihadapi oleh masyarakat modern. Tiga jenis pencemaran utama yang perlu kita waspadai adalah pencemaran air, tanah, dan udara. Mari kita bahas lebih detail mengenai masing-masing jenis pencemaran ini. 1. Pencemaran Air Pencemaran air terjadi ketika ada perubahan keadaan air akibat aktivitas manusia. Perubahan ini bisa mencakup perubahan bau, warna, atau rasa air. Sumber-sumber pencemaran air sangat beragam, mulai dari limbah pertanian hingga limbah rumah tangga. Dampak pencemaran air sangat luas dan berbahaya . Beberapa dampak yang perlu kita waspadai antara lain: Kerusakan ekosistem air, yang dapat mengancam kelangsungan hidup berbagai spesies air Kematian hewan-hewan air akibat racun atau kurangnya oksigen Air menjadi tidak layak konsumsi, yang dapat mengancam kesehatan manusia Pendangkalan sungai akibat akumulasi limbah Ledakan populasi alga yang dapat mengga...

Quiz 1   Fullscreen Mode Direct and Inverse Proportions Direct Proportion Two quantities x and y are in direct proportion when they increase or decrease in the same ratio, written as: \[ x \propto y \] \[ \frac{x}{y} = k \] where k is the constant of proportionality Properties of Direct Proportion If x increases, y increases in the same ratio If x decreases, y decreases in the same ratio The ratio x/y remains constant Inverse Proportion Two quantities x and y are in inverse proportion when one increases as the other decreases in the same ratio, written as: \[ x \propto \frac{1}{y} \] \[ xy = k \] where k is the constant of proportionality Applications and Examples Direct Proportion Examples 1. Distance and Time (Uniform Speed): Speed = 75 km/hour Distance in 20 minutes = (75 × 20)/60 = 25 km 2. Cost and Quantity: 5 meters cloth = ₹210 13 meters cloth = (210 × 13)/5 = ₹546 Inverse Proportion Examples 1. Wo...

Quiz 1:   Fullscreen Mode Quiz 2: Suhu, Termometer, dan Konversi Suhu Panduan Lengkap Suhu, Termometer, dan Konversi Suhu 1. Pengertian Suhu Suhu adalah ukuran derajat panas atau dinginnya suatu benda. Suhu menunjukkan tingkat energi kinetik partikel dalam suatu zat. 2. Jenis Termometer dan Skala Suhu Terdapat empat skala termometer utama: Celsius (°C) Reamur (°R) Fahrenheit (°F) Kelvin (K) 3. Titik Tetap Termometer Setiap termometer memiliki dua titik acuan: Titik Beku Air: 0°C = 32°F = 0°R = 273 K Titik Didih Air: 100°C = 212°F = 80°R = 373,15 K 4. Rumus Konversi Suhu Celsius ke Reamur R = (4/5) × C C = (5/4) × R Celsius ke Fahrenheit F = (9/5) × C + 32 C = (F - 32) × (5/9) Celsius ke Kelvin K = C + 273 C = K - 273 ...

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