https://knowledge.robustadev.com/ 2026-10-01T23:01:13.923Z https://knowledge.robustadev.com/physics/ 2026-09-30T13:19:13.500Z https://knowledge.robustadev.com/computer-science/ 2026-10-01T02:15:43.409Z https://knowledge.robustadev.com/computer-science/behind-the-scenes/ 2026-10-01T02:15:43.409Z https://knowledge.robustadev.com/computer-science/grade-9-data-transmission/ 2026-09-30T14:43:26.627Z https://knowledge.robustadev.com/computer-science/how-ai-works/ 2026-09-30T13:55:45.543Z https://knowledge.robustadev.com/biology/ 2026-09-30T13:18:34.705Z https://knowledge.robustadev.com/software-engineering/ 2026-10-01T22:47:37.655Z https://knowledge.robustadev.com/software-engineering/backend-runtimes/ 2026-10-01T14:06:03.517Z https://knowledge.robustadev.com/software-engineering/containers/ 2026-10-01T14:43:04.635Z https://knowledge.robustadev.com/software-engineering/in-memory-stores/ 2026-10-01T14:20:11.159Z https://knowledge.robustadev.com/software-engineering/kubernetes-internals/ 2026-10-01T14:44:41.282Z https://knowledge.robustadev.com/software-engineering/message-brokers/ 2026-10-01T14:19:27.615Z https://knowledge.robustadev.com/software-engineering/scrum/ 2026-10-01T22:47:37.655Z https://knowledge.robustadev.com/economics/ 2026-10-01T23:01:13.923Z https://knowledge.robustadev.com/physics/electricity-basics/electricity/ 2026-09-30T13:19:13.500Z https://knowledge.robustadev.com/posters/physics/electricity-basics/electricity.jpg?v=tm6ic1 What is electricity? Atoms, free electrons and a battery-and-bulb circuit: voltage, current and resistance. https://knowledge.robustadev.com/videos/physics/electricity-basics/electricity.mp4?v=tm6ic1 72 2026-09-30T13:19:13.500Z https://knowledge.robustadev.com/physics/electricity-basics/copper/ 2026-09-30T11:54:05.201Z https://knowledge.robustadev.com/posters/physics/electricity-basics/copper.jpg?v=tm6ee5 Why is copper a good conductor? One loose outer electron per atom makes a sea of free electrons, and an orderly lattice lets them flow. https://knowledge.robustadev.com/videos/physics/electricity-basics/copper.mp4?v=tm6ee5 85 2026-09-30T11:54:05.201Z https://knowledge.robustadev.com/computer-science/behind-the-scenes/web-to-video/ 2026-10-01T01:46:15.373Z https://knowledge.robustadev.com/posters/computer-science/behind-the-scenes/web-to-video.jpg?v=tm7gx3 How are web animations turned into videos? A scene is a function of time: Chromium captures it frame by frame, ffmpeg encodes the video and mixes in the narration. https://knowledge.robustadev.com/videos/computer-science/behind-the-scenes/web-to-video.mp4?v=tm7gx3 123 2026-10-01T01:46:15.373Z https://knowledge.robustadev.com/computer-science/behind-the-scenes/browser-rendering/ 2026-10-01T02:15:43.409Z https://knowledge.robustadev.com/posters/computer-science/behind-the-scenes/browser-rendering.jpg?v=tm7ia7 How does a browser render a page? From HTML and CSS bytes to pixels: DOM, CSSOM, render tree, layout, paint and compositing. https://knowledge.robustadev.com/videos/computer-science/behind-the-scenes/browser-rendering.mp4?v=tm7ia7 143 2026-10-01T02:15:43.409Z https://knowledge.robustadev.com/computer-science/behind-the-scenes/url-to-page/ 2026-10-01T02:14:26.876Z https://knowledge.robustadev.com/posters/computer-science/behind-the-scenes/url-to-page.jpg?v=tm7i82 From typing a URL to seeing the page DNS, TCP and TLS, a static frontend served from a CDN, one call to a Go API, and the final render. https://knowledge.robustadev.com/videos/computer-science/behind-the-scenes/url-to-page.mp4?v=tm7i82 160 2026-10-01T02:14:26.876Z https://knowledge.robustadev.com/computer-science/grade-9-data-transmission/packet-switching/ 2026-09-30T14:38:00.994Z https://knowledge.robustadev.com/posters/computer-science/grade-9-data-transmission/packet-switching.jpg?v=tm6lzc Data packets and packet switching Packet structure, routing, out-of-order arrival and reassembly. https://knowledge.robustadev.com/videos/computer-science/grade-9-data-transmission/packet-switching.mp4?v=tm6lzc 92 2026-09-30T14:38:00.994Z https://knowledge.robustadev.com/computer-science/grade-9-data-transmission/transmission-modes/ 2026-09-30T14:35:25.025Z https://knowledge.robustadev.com/posters/computer-science/grade-9-data-transmission/transmission-modes.jpg?v=tm6lv1 Simplex, half-duplex and full-duplex Which way the data flows, and when. https://knowledge.robustadev.com/videos/computer-science/grade-9-data-transmission/transmission-modes.mp4?v=tm6lv1 79 2026-09-30T14:35:25.025Z https://knowledge.robustadev.com/computer-science/grade-9-data-transmission/serial-parallel/ 2026-09-30T14:36:03.004Z https://knowledge.robustadev.com/posters/computer-science/grade-9-data-transmission/serial-parallel.jpg?v=tm6lw3 Serial and parallel transmission Bits one by one or all at once, skew, crosstalk and USB. https://knowledge.robustadev.com/videos/computer-science/grade-9-data-transmission/serial-parallel.mp4?v=tm6lw3 103 2026-09-30T14:36:03.004Z https://knowledge.robustadev.com/computer-science/grade-9-data-transmission/error-detection/ 2026-09-30T14:32:46.307Z https://knowledge.robustadev.com/posters/computer-science/grade-9-data-transmission/error-detection.jpg?v=tm6lqm Error detection Why errors happen, and checksums, echo checks and ARQ. https://knowledge.robustadev.com/videos/computer-science/grade-9-data-transmission/error-detection.mp4?v=tm6lqm 81 2026-09-30T14:32:46.307Z https://knowledge.robustadev.com/computer-science/grade-9-data-transmission/parity/ 2026-09-30T14:33:48.089Z https://knowledge.robustadev.com/posters/computer-science/grade-9-data-transmission/parity.jpg?v=tm6lsc Parity checks Parity bits and parity blocks, including finding and fixing a flipped bit. https://knowledge.robustadev.com/videos/computer-science/grade-9-data-transmission/parity.mp4?v=tm6lsc 73 2026-09-30T14:33:48.089Z https://knowledge.robustadev.com/computer-science/grade-9-data-transmission/check-digits/ 2026-09-30T14:36:39.352Z https://knowledge.robustadev.com/posters/computer-science/grade-9-data-transmission/check-digits.jpg?v=tm6lx3 Check digits The multiply, add, divide-by-10 method with a worked example and a practice question. https://knowledge.robustadev.com/videos/computer-science/grade-9-data-transmission/check-digits.mp4?v=tm6lx3 92 2026-09-30T14:36:39.352Z https://knowledge.robustadev.com/computer-science/grade-9-data-transmission/encryption/ 2026-09-30T14:37:12.272Z https://knowledge.robustadev.com/posters/computer-science/grade-9-data-transmission/encryption.jpg?v=tm6ly0 Encryption Eavesdroppers, symmetric keys and the public and private key pair. https://knowledge.robustadev.com/videos/computer-science/grade-9-data-transmission/encryption.mp4?v=tm6ly0 88 2026-09-30T14:37:12.272Z https://knowledge.robustadev.com/computer-science/grade-9-data-transmission/quiz/ 2026-09-30T14:43:26.627Z https://knowledge.robustadev.com/posters/computer-science/grade-9-data-transmission/quiz.jpg?v=tm6m8e Unit 2 quiz Ten questions with a think-time countdown and explained answers. https://knowledge.robustadev.com/videos/computer-science/grade-9-data-transmission/quiz.mp4?v=tm6m8e 308 2026-09-30T14:43:26.627Z https://knowledge.robustadev.com/computer-science/how-ai-works/ai/ 2026-09-30T12:03:32.002Z https://knowledge.robustadev.com/posters/computer-science/how-ai-works/ai.jpg?v=tm6etw How does AI work? Neurons and weights, learning from mistakes, and predicting the next word. https://knowledge.robustadev.com/videos/computer-science/how-ai-works/ai.mp4?v=tm6etw 74 2026-09-30T12:03:32.002Z https://knowledge.robustadev.com/computer-science/how-ai-works/attention/ 2026-09-30T13:00:07.581Z https://knowledge.robustadev.com/posters/computer-science/how-ai-works/attention.jpg?v=tm6hg7 How does AI read a sentence? Tokens, embeddings and attention, stacked in layers to score the next token. https://knowledge.robustadev.com/videos/computer-science/how-ai-works/attention.mp4?v=tm6hg7 73 2026-09-30T13:00:07.581Z https://knowledge.robustadev.com/computer-science/how-ai-works/parameters/ 2026-09-30T13:04:54.023Z https://knowledge.robustadev.com/posters/computer-science/how-ai-works/parameters.jpg?v=tm6ho6 What are billions of parameters? What a parameter is, how big a billion is, and why big models need racks of GPUs. https://knowledge.robustadev.com/videos/computer-science/how-ai-works/parameters.mp4?v=tm6ho6 77 2026-09-30T13:04:54.023Z https://knowledge.robustadev.com/computer-science/how-ai-works/backpropagation/ 2026-09-30T13:33:04.598Z https://knowledge.robustadev.com/posters/computer-science/how-ai-works/backpropagation.jpg?v=tm6iz4 How do networks learn from errors? Loss as a landscape, gradient descent and backpropagation. https://knowledge.robustadev.com/videos/computer-science/how-ai-works/backpropagation.mp4?v=tm6iz4 86 2026-09-30T13:33:04.598Z https://knowledge.robustadev.com/computer-science/how-ai-works/training-pipeline/ 2026-09-30T13:36:00.032Z https://knowledge.robustadev.com/posters/computer-science/how-ai-works/training-pipeline.jpg?v=tm6j40 How is a chatbot trained? Pretraining, fine-tuning and human feedback turn a text predictor into an assistant. https://knowledge.robustadev.com/videos/computer-science/how-ai-works/training-pipeline.mp4?v=tm6j40 84 2026-09-30T13:36:00.032Z https://knowledge.robustadev.com/computer-science/how-ai-works/temperature/ 2026-09-30T13:38:39.484Z https://knowledge.robustadev.com/posters/computer-science/how-ai-works/temperature.jpg?v=tm6j8f What does temperature do? Scores become probabilities, and temperature sharpens or flattens them. https://knowledge.robustadev.com/videos/computer-science/how-ai-works/temperature.mp4?v=tm6j8f 83 2026-09-30T13:38:39.484Z https://knowledge.robustadev.com/computer-science/how-ai-works/diffusion/ 2026-09-30T13:41:21.402Z https://knowledge.robustadev.com/posters/computer-science/how-ai-works/diffusion.jpg?v=tm6jcx How does AI draw pictures? Diffusion models add noise to learn, then remove it to create, steered by a prompt. https://knowledge.robustadev.com/videos/computer-science/how-ai-works/diffusion.mp4?v=tm6jcx 79 2026-09-30T13:41:21.402Z https://knowledge.robustadev.com/computer-science/how-ai-works/rag/ 2026-09-30T13:55:15.260Z https://knowledge.robustadev.com/posters/computer-science/how-ai-works/rag.jpg?v=tm6k03 How can AI use your own documents? Retrieval-augmented generation: embed, retrieve, augment the prompt, generate. https://knowledge.robustadev.com/videos/computer-science/how-ai-works/rag.mp4?v=tm6k03 75 2026-09-30T13:55:15.260Z https://knowledge.robustadev.com/computer-science/how-ai-works/hallucination/ 2026-09-30T13:55:45.543Z https://knowledge.robustadev.com/posters/computer-science/how-ai-works/hallucination.jpg?v=tm6k0x Why does AI make things up? Likely is not the same as true: gaps, snowballing errors, and what helps. https://knowledge.robustadev.com/videos/computer-science/how-ai-works/hallucination.mp4?v=tm6k0x 74 2026-09-30T13:55:45.543Z https://knowledge.robustadev.com/computer-science/how-ai-works/context-window/ 2026-09-30T13:53:58.274Z https://knowledge.robustadev.com/posters/computer-science/how-ai-works/context-window.jpg?v=tm6jxy How much can an AI remember? The context window, forgetting, the cost of long inputs, and workarounds. https://knowledge.robustadev.com/videos/computer-science/how-ai-works/context-window.mp4?v=tm6jxy 76 2026-09-30T13:53:58.274Z https://knowledge.robustadev.com/computer-science/how-ai-works/agents/ 2026-09-30T13:54:19.878Z https://knowledge.robustadev.com/posters/computer-science/how-ai-works/agents.jpg?v=tm6jyj What is an AI agent? A model in a loop with tools and guardrails. https://knowledge.robustadev.com/videos/computer-science/how-ai-works/agents.mp4?v=tm6jyj 69 2026-09-30T13:54:19.878Z https://knowledge.robustadev.com/computer-science/how-ai-works/bias/ 2026-09-30T13:52:24.921Z https://knowledge.robustadev.com/posters/computer-science/how-ai-works/bias.jpg?v=tm6jvc Can AI be biased? Skewed data, where bias comes from, proxies, and how to audit and fix it. https://knowledge.robustadev.com/videos/computer-science/how-ai-works/bias.mp4?v=tm6jvc 72 2026-09-30T13:52:24.921Z https://knowledge.robustadev.com/computer-science/how-ai-works/overfitting/ 2026-09-30T13:54:44.285Z https://knowledge.robustadev.com/posters/computer-science/how-ai-works/overfitting.jpg?v=tm6jz8 What is overfitting? Underfit, good fit and overfit curves, train vs test error, and the fixes. https://knowledge.robustadev.com/videos/computer-science/how-ai-works/overfitting.mp4?v=tm6jz8 70 2026-09-30T13:54:44.285Z https://knowledge.robustadev.com/biology/energy-in-cells/respiration/ 2026-09-30T13:16:26.309Z https://knowledge.robustadev.com/posters/biology/energy-in-cells/respiration.jpg?v=tm6i7e How do cells make energy? Glycolysis, the Krebs cycle and the electron transport chain: about 30 ATP from one glucose. https://knowledge.robustadev.com/videos/biology/energy-in-cells/respiration.mp4?v=tm6i7e 100 2026-09-30T13:16:26.309Z https://knowledge.robustadev.com/biology/energy-in-cells/photosynthesis/ 2026-09-30T13:18:34.705Z https://knowledge.robustadev.com/posters/biology/energy-in-cells/photosynthesis.jpg?v=tm6iay Inside a leaf: how photosynthesis works Leaf anatomy, then the light reactions and the Calvin cycle that turn light, water and CO2 into glucose. https://knowledge.robustadev.com/videos/biology/energy-in-cells/photosynthesis.mp4?v=tm6iay 98 2026-09-30T13:18:34.705Z https://knowledge.robustadev.com/software-engineering/backend-runtimes/why-go/ 2026-10-01T14:05:20.832Z https://knowledge.robustadev.com/posters/software-engineering/backend-runtimes/why-go.jpg?v=tm8f4w Why Go? Why Go exists: single-binary deploys, goroutines scheduled onto a few threads, and channels. https://knowledge.robustadev.com/videos/software-engineering/backend-runtimes/why-go.mp4?v=tm8f4w 69 2026-10-01T14:05:20.832Z https://knowledge.robustadev.com/software-engineering/backend-runtimes/why-java/ 2026-10-01T14:05:42.586Z https://knowledge.robustadev.com/posters/software-engineering/backend-runtimes/why-java.jpg?v=tm8f5i Why Java? Bytecode and the JVM, the JIT compiler, garbage collection, and why Java suits large systems. https://knowledge.robustadev.com/videos/software-engineering/backend-runtimes/why-java.mp4?v=tm8f5i 76 2026-10-01T14:05:42.586Z https://knowledge.robustadev.com/software-engineering/backend-runtimes/why-nodejs/ 2026-10-01T14:06:03.517Z https://knowledge.robustadev.com/posters/software-engineering/backend-runtimes/why-nodejs.jpg?v=tm8f63 Why Node.js? Why a single thread with an event loop suits I/O-heavy servers, and where it breaks down. https://knowledge.robustadev.com/videos/software-engineering/backend-runtimes/why-nodejs.mp4?v=tm8f63 72 2026-10-01T14:06:03.517Z https://knowledge.robustadev.com/software-engineering/containers/why-docker/ 2026-10-01T14:42:40.504Z https://knowledge.robustadev.com/posters/software-engineering/containers/why-docker.jpg?v=tm8gv4 Why Docker? Images, containers, layers, and why containers are lighter than virtual machines. https://knowledge.robustadev.com/videos/software-engineering/containers/why-docker.mp4?v=tm8gv4 77 2026-10-01T14:42:40.504Z https://knowledge.robustadev.com/software-engineering/containers/why-kubernetes/ 2026-10-01T14:43:04.635Z https://knowledge.robustadev.com/posters/software-engineering/containers/why-kubernetes.jpg?v=tm8gvs Why Kubernetes? Why we orchestrate containers: declarative desired state, scheduling, self-healing, scaling, rolling updates and services. https://knowledge.robustadev.com/videos/software-engineering/containers/why-kubernetes.mp4?v=tm8gvs 88 2026-10-01T14:43:04.635Z https://knowledge.robustadev.com/software-engineering/in-memory-stores/why-redis/ 2026-10-01T14:20:11.159Z https://knowledge.robustadev.com/posters/software-engineering/in-memory-stores/why-redis.jpg?v=tm8ftn Why Redis? Why an in-memory store speeds up reads, how caching and TTL work, and Redis data structures. https://knowledge.robustadev.com/videos/software-engineering/in-memory-stores/why-redis.mp4?v=tm8ftn 71 2026-10-01T14:20:11.159Z https://knowledge.robustadev.com/software-engineering/in-memory-stores/redis-vs-valkey/ 2026-10-01T14:19:49.259Z https://knowledge.robustadev.com/posters/software-engineering/in-memory-stores/redis-vs-valkey.jpg?v=tm8ft1 Redis vs Valkey Why Valkey was forked from Redis, what stays compatible, and how to choose. https://knowledge.robustadev.com/videos/software-engineering/in-memory-stores/redis-vs-valkey.mp4?v=tm8ft1 75 2026-10-01T14:19:49.259Z https://knowledge.robustadev.com/software-engineering/kubernetes-internals/control-plane/ 2026-10-01T14:43:31.503Z https://knowledge.robustadev.com/posters/software-engineering/kubernetes-internals/control-plane.jpg?v=tm8gwj Inside Kubernetes The control plane and the nodes: API server, etcd, scheduler, controllers and kubelet, and how a pod gets created. https://knowledge.robustadev.com/videos/software-engineering/kubernetes-internals/control-plane.mp4?v=tm8gwj 90 2026-10-01T14:43:31.503Z https://knowledge.robustadev.com/software-engineering/kubernetes-internals/etcd/ 2026-10-01T14:43:57.691Z https://knowledge.robustadev.com/posters/software-engineering/kubernetes-internals/etcd.jpg?v=tm8gx9 What does etcd do? etcd as the Kubernetes database: keys, leader election, Raft quorum, watches and backups. https://knowledge.robustadev.com/videos/software-engineering/kubernetes-internals/etcd.mp4?v=tm8gx9 90 2026-10-01T14:43:57.691Z https://knowledge.robustadev.com/software-engineering/kubernetes-internals/scheduler/ 2026-10-01T14:44:18.148Z https://knowledge.robustadev.com/posters/software-engineering/kubernetes-internals/scheduler.jpg?v=tm8gxu How the scheduler works How kube-scheduler picks a node for a pod: filtering, scoring, binding, and how to influence it. https://knowledge.robustadev.com/videos/software-engineering/kubernetes-internals/scheduler.mp4?v=tm8gxu 69 2026-10-01T14:44:18.148Z https://knowledge.robustadev.com/software-engineering/kubernetes-internals/controllers/ 2026-10-01T14:44:41.282Z https://knowledge.robustadev.com/posters/software-engineering/kubernetes-internals/controllers.jpg?v=tm8gyh Controllers and reconciliation The control loop at the heart of Kubernetes: desired vs actual state, Deployments, ReplicaSets and the kubelet. https://knowledge.robustadev.com/videos/software-engineering/kubernetes-internals/controllers.mp4?v=tm8gyh 81 2026-10-01T14:44:41.282Z https://knowledge.robustadev.com/software-engineering/message-brokers/why-rabbitmq/ 2026-10-01T14:19:27.615Z https://knowledge.robustadev.com/posters/software-engineering/message-brokers/why-rabbitmq.jpg?v=tm8fsf Why RabbitMQ? Why message brokers decouple services, and how exchanges, queues, acknowledgements and competing consumers work. https://knowledge.robustadev.com/videos/software-engineering/message-brokers/why-rabbitmq.mp4?v=tm8fsf 79 2026-10-01T14:19:27.615Z https://knowledge.robustadev.com/software-engineering/message-brokers/why-kafka/ 2026-10-01T14:19:05.402Z https://knowledge.robustadev.com/posters/software-engineering/message-brokers/why-kafka.jpg?v=tm8frt Why Kafka? Kafka as a distributed log: offsets, partitions, keys, replication and replay. https://knowledge.robustadev.com/videos/software-engineering/message-brokers/why-kafka.mp4?v=tm8frt 87 2026-10-01T14:19:05.402Z https://knowledge.robustadev.com/software-engineering/scrum/why-scrum/ 2026-10-01T06:35:37.168Z https://knowledge.robustadev.com/posters/software-engineering/scrum/why-scrum.jpg?v=tm7ubd Why do we need Scrum? The problems with plan-everything-first delivery: late feedback, changing requirements and rising cost of change, and how many small bets fix them. https://knowledge.robustadev.com/videos/software-engineering/scrum/why-scrum.mp4?v=tm7ubd 72 2026-10-01T06:35:37.168Z https://knowledge.robustadev.com/software-engineering/scrum/empirical-process/ 2026-10-01T06:34:52.654Z https://knowledge.robustadev.com/posters/software-engineering/scrum/empirical-process.jpg?v=tm7ua4 Why Scrum is empirical Why complex work needs steering by evidence, and how transparency, inspection and adaptation depend on each other. https://knowledge.robustadev.com/videos/software-engineering/scrum/empirical-process.mp4?v=tm7ua4 77 2026-10-01T06:34:52.654Z https://knowledge.robustadev.com/software-engineering/scrum/why-sprints/ 2026-10-01T06:35:55.253Z https://knowledge.robustadev.com/posters/software-engineering/scrum/why-sprints.jpg?v=tm7ubv Why short sprints? Why timeboxes create fast feedback, smaller risk and protected focus. https://knowledge.robustadev.com/videos/software-engineering/scrum/why-sprints.mp4?v=tm7ubv 64 2026-10-01T06:35:55.253Z https://knowledge.robustadev.com/software-engineering/scrum/roles-and-events/ 2026-10-01T06:35:16.972Z https://knowledge.robustadev.com/posters/software-engineering/scrum/roles-and-events.jpg?v=tm7uas Why Scrum roles and events exist The problem each Scrum accountability and event solves. https://knowledge.robustadev.com/videos/software-engineering/scrum/roles-and-events.mp4?v=tm7uas 87 2026-10-01T06:35:16.972Z https://knowledge.robustadev.com/software-engineering/scrum/scrum-vs-kanban/ 2026-10-01T22:47:37.655Z https://knowledge.robustadev.com/posters/software-engineering/scrum/scrum-vs-kanban.jpg?v=tm93bd Scrum vs Kanban What the two share, and how they differ in cadence, limits, change, roles and metrics, plus when to choose each. https://knowledge.robustadev.com/videos/software-engineering/scrum/scrum-vs-kanban.mp4?v=tm93bd 111 2026-10-01T22:47:37.655Z https://knowledge.robustadev.com/economics/money-and-rates/what-is-money/ 2026-10-01T15:46:02.239Z https://knowledge.robustadev.com/posters/economics/money-and-rates/what-is-money.jpg?v=tm8jsq What is money? From barter to fiat money: what money does, why it works, and what inflation is. https://knowledge.robustadev.com/videos/economics/money-and-rates/what-is-money.mp4?v=tm8jsq 93 2026-10-01T15:46:02.239Z https://knowledge.robustadev.com/economics/money-and-rates/money-and-gold/ 2026-10-01T15:50:50.610Z https://knowledge.robustadev.com/posters/economics/money-and-rates/money-and-gold.jpg?v=tm8k0q Money and gold Why gold was money, how paper receipts and the gold standard worked, why it ended in 1971, and why gold is still stored today. https://knowledge.robustadev.com/videos/economics/money-and-rates/money-and-gold.mp4?v=tm8k0q 104 2026-10-01T15:50:50.610Z https://knowledge.robustadev.com/economics/money-and-rates/exchange-rates/ 2026-10-01T15:46:27.166Z https://knowledge.robustadev.com/posters/economics/money-and-rates/exchange-rates.jpg?v=tm8jtf How exchange rates work The price of one currency in another: why we need it, what moves it, and who it helps or hurts. https://knowledge.robustadev.com/videos/economics/money-and-rates/exchange-rates.mp4?v=tm8jtf 88 2026-10-01T15:46:27.166Z https://knowledge.robustadev.com/economics/money-and-rates/fed-rate-hikes/ 2026-10-01T15:46:53.264Z https://knowledge.robustadev.com/posters/economics/money-and-rates/fed-rate-hikes.jpg?v=tm8ju5 Why US rate hikes shake the world How a Federal Reserve rate hike pulls money into the dollar and squeezes currencies, debts and growth elsewhere. https://knowledge.robustadev.com/videos/economics/money-and-rates/fed-rate-hikes.mp4?v=tm8ju5 91 2026-10-01T15:46:53.264Z https://knowledge.robustadev.com/economics/money-and-rates/who-controls-money/ 2026-10-01T23:01:13.923Z https://knowledge.robustadev.com/posters/economics/money-and-rates/who-controls-money.jpg?v=tm93y1 Who controls the money supply? Who decides how much money a country has, and how bank deposits can grow without printing any paper money. https://knowledge.robustadev.com/videos/economics/money-and-rates/who-controls-money.mp4?v=tm93y1 141 2026-10-01T23:01:13.923Z https://knowledge.robustadev.com/vi/ 2026-09-30T17:16:35.315Z https://knowledge.robustadev.com/vi/physics/ 2026-09-30T16:56:50.346Z https://knowledge.robustadev.com/vi/biology/ 2026-09-30T17:16:35.315Z https://knowledge.robustadev.com/vi/physics/electricity-basics/electricity/ 2026-09-30T16:50:20.632Z https://knowledge.robustadev.com/posters/physics/electricity-basics/electricity.vi.jpg?v=tm6s3w Điện là gì? Nguyên tử, electron tự do và mạch điện gồm pin và bóng đèn: hiệu điện thế, dòng điện và điện trở. https://knowledge.robustadev.com/videos/physics/electricity-basics/electricity.vi.mp4?v=tm6s3w 78 2026-09-30T16:50:20.632Z https://knowledge.robustadev.com/vi/physics/electricity-basics/copper/ 2026-09-30T16:56:50.346Z https://knowledge.robustadev.com/posters/physics/electricity-basics/copper.vi.jpg?v=tm6seq Vì sao đồng dẫn điện tốt? Mỗi nguyên tử có một electron ngoài cùng lỏng lẻo tạo nên biển electron tự do, và mạng tinh thể ngăn nắp giúp chúng chảy dễ dàng. https://knowledge.robustadev.com/videos/physics/electricity-basics/copper.vi.mp4?v=tm6seq 91 2026-09-30T16:56:50.346Z https://knowledge.robustadev.com/vi/biology/energy-in-cells/respiration/ 2026-09-30T17:16:02.388Z https://knowledge.robustadev.com/posters/biology/energy-in-cells/respiration.vi.jpg?v=tm6taq Tế bào tạo ra năng lượng thế nào? Đường phân, chu trình Krebs và chuỗi truyền electron: khoảng 30 ATP từ một phân tử glucose. https://knowledge.robustadev.com/videos/biology/energy-in-cells/respiration.vi.mp4?v=tm6taq 105 2026-09-30T17:16:02.388Z https://knowledge.robustadev.com/vi/biology/energy-in-cells/photosynthesis/ 2026-09-30T17:16:35.315Z https://knowledge.robustadev.com/posters/biology/energy-in-cells/photosynthesis.vi.jpg?v=tm6tbn Bên trong chiếc lá: quang hợp diễn ra thế nào Cấu tạo của lá, rồi các phản ứng sáng và chu trình Calvin biến ánh sáng, nước và CO2 thành glucose. https://knowledge.robustadev.com/videos/biology/energy-in-cells/photosynthesis.vi.mp4?v=tm6tbn 103 2026-09-30T17:16:35.315Z