OS
OpenStem
@openstem · Joined Jul 2026
7420 public items8 groups
Collection5 items
01Engineering · L3 · Project Scheduling
02Engineering · L3 · Project Scheduling
03Engineering · L3 · Project Scheduling
+2 moreEngineering · L3 · Project Scheduling
@openstem
Engineering · L3 · Project SchedulingCollection5 items
01Engineering · L3 · Design for Manufacturing
02Engineering · L3 · Design for Manufacturing
03Engineering · L3 · Design for Manufacturing
+2 moreEngineering · L3 · Design for Manufacturing
@openstem
Engineering · L3 · Design for ManufacturingCollection2 items
01Engineering · L4 · Statics — Equilibrium & Free-Body Analysis
02Engineering · L4 · Mechanics of Materials — Stress, Strain & Failure
Engineering · L4 · Statics & Mechanics of Materials
@openstem
Engineering · L4 · Statics & Mechanics of MaterialsCollection1 items
01Engineering · L4 · Electric Circuits — DC & AC Analysis
Engineering · L4 · Circuits & Signals
@openstem
Engineering · L4 · Circuits & SignalsCollection4 items
01Engineering · L4 · Control Systems — Fundamentals & PID
02Engineering · L4 · PID control: tuning, anti-windup, and practical design
03Engineering · L4 · Closed-loop feedback control system block diagram
+1 moreEngineering · L4 · Control Systems Intro
@openstem
Engineering · L4 · Control Systems IntroCollection4 items
01Engineering · L4 · Aerodynamics
02Engineering · L4 · Aerodynamics: lift, drag, and airfoil behaviour
03Engineering · L4 · Lift generation and stall as angle of attack increases
+1 moreEngineering · L4 · Aerodynamics
@openstem
Engineering · L4 · AerodynamicsCollection4 items
01Engineering · L4 · Manufacturing Processes & GD&T
02Engineering · L4 · Manufacturing processes and GD&T: from raw stock to a functioning part
03Engineering · L4 · Manufacturing process selection
+1 moreEngineering · L4 · Manufacturing Processes & GD&T
@openstem
Engineering · L4 · Manufacturing Processes & GD&TCollection4 items
01Engineering · L4 · Electrical Machines & Power Systems
02Engineering · L4 · Electrical machines and power systems: transformers, three-phase, and motors
03Engineering · L4 · Power delivery chain: generation to end use
+1 moreEngineering · L4 · Electrical Machines & Power Systems
@openstem
Engineering · L4 · Electrical Machines & Power SystemsCollection4 items
01Engineering · L4 · Signals & Systems
02Engineering · L4 · Signals and systems: convolution, Fourier transforms, and digital filters
03Engineering · L4 · From time-domain signal to filtered digital output
+1 moreEngineering · L4 · Signals & Systems
@openstem
Engineering · L4 · Signals & SystemsCollection4 items
01Engineering · L4 · Mechanical Vibrations
02Engineering · L4 · Mechanical vibrations: natural frequency, damping, and resonance
03Engineering · L4 · Single-DOF vibration response by damping ratio
+1 moreEngineering · L4 · Mechanical Vibrations
@openstem
Engineering · L4 · Mechanical VibrationsCollection2 items
01Engineering · L5 · Turbulence: Reynolds Decomposition & Energy Cascade
02Engineering · L5 · Nonlinear Dynamics: Lyapunov Stability & Bifurcations
Engineering · Fluids & Thermal
@openstem
Engineering · Fluids & ThermalCollection11 items
01Engineering · L5 · Finite Element Method
02Engineering · L5 · Optimal Control & LQR
03Engineering · L5 · FEM: From Strong Form to Ku = f
+8 moreEngineering · L5 · Control, FEM & Dynamics
@openstem
Engineering · L5 · Control, FEM & DynamicsCollection4 items
01Engineering · L5 · Kalman Filtering & State Estimation
02Engineering · L5 · The Kalman filter: optimal recursive state estimation
03Engineering · L5 · Kalman filter predict-update recursion
+1 moreEngineering · L5 · Kalman Filtering & State Estimation
@openstem
Engineering · L5 · Kalman Filtering & State EstimationCollection4 items
01Engineering · L5 · Model Predictive Control
02Engineering · L5 · Model predictive control: optimizing a receding horizon under constraints
03Engineering · L5 · MPC receding-horizon control loop
+1 moreEngineering · L5 · Model Predictive Control
@openstem
Engineering · L5 · Model Predictive ControlCollection4 items
01Engineering · L5 · Robot Kinematics & Dynamics
02Engineering · L5 · Robot kinematics and dynamics: from joint angles to end-effector motion
03Engineering · L5 · Manipulator kinematics and dynamics pipeline
+1 moreEngineering · L5 · Robot Kinematics & Dynamics
@openstem
Engineering · L5 · Robot Kinematics & DynamicsFlashcards8 cards
Why is a tower with a wide base more stable than one with a narrow base?1 / 8
A wide base spreads the tower's weight over more floor space, so it takes a much bigger push to tip it over. A narrow base balances on a tiny spot, so even a small push knocks it off balance.
Engineering · L1 · Towers & Stacking
@openstem
Engineering · L1 · Towers & StackingFlashcards8 cards
How does a remote control talk to a TV without wires?1 / 8
It sends an invisible signal through the air. The TV has a sensor that catches the signal and reacts.
Engineering · L1 · Remote Controls & Signals
@openstem
Engineering · L1 · Remote Controls & SignalsFlashcards9 cards
What does a motor do?1 / 9
A motor turns electricity into spinning motion. Give it power, and it spins!
Engineering · L1 · Fans & Motors
@openstem
Engineering · L1 · Fans & MotorsFlashcards8 cards
Why does a heavy metal boat float, even though a lump of metal would sink?1 / 8
The boat's wide, bowl shape pushes a lot of water out of the way. That water pushes back up under the boat, hard enough to hold it up.
Engineering · L1 · Boats & Floating Cargo
@openstem
Engineering · L1 · Boats & Floating CargoFlashcards5 cards
What does an engineer do?1 / 5
An engineer solves problems. They build and fix things to make life better.
Engineering · L1 · What Do Engineers Do?
@openstem
Engineering · L1 · What Do Engineers Do?Flashcards5 cards
What is a lever?1 / 5
A lever is a bar that rests on a pivot. A seesaw is a lever — one side goes up when the other goes down.
Engineering · L1 · Simple Machines
@openstem
Engineering · L1 · Simple MachinesFlashcards10 cards
What is a material?1 / 10
A material is what something is made of, like wood, metal, plastic, or fabric.
Engineering · L1 · What Are Materials?
@openstem
Engineering · L1 · What Are Materials?Flashcards8 cards
What happens when you push sideways on a square frame?1 / 8
It leans over into a slanted shape called a parallelogram. The square wobbles.
Engineering · L1 · Strong Shapes
@openstem
Engineering · L1 · Strong ShapesFlashcards10 cards
What four parts do you need to build a simple circuit?1 / 10
A battery, wire, a bulb, and (if you want to switch it off) a switch — all joined together with no gaps.
Engineering · L1 · Building Simple Circuits
@openstem
Engineering · L1 · Building Simple CircuitsFlashcards9 cards
What tool do you use to measure how long something is?1 / 9
A ruler. It has marks that show inches or centimetres.
Engineering · L1 · Tools & Safety
@openstem
Engineering · L1 · Tools & SafetyFlashcards9 cards
How does water get to your kitchen tap?1 / 9
It travels through a long chain of pipes, from a water tower or treatment plant, under the streets, and into your house.
Engineering · L1 · Pipes & Water Flow
@openstem
Engineering · L1 · Pipes & Water FlowFlashcards10 cards
Why does a metal spoon get hot fast in a pot of soup?1 / 10
Metal is a good heat conductor. Heat moves through it quickly, all the way up the handle.
Engineering · L1 · Materials That Change With Heat
@openstem
Engineering · L1 · Materials That Change With HeatFlashcards10 cards
Why do engineers measure before they build?1 / 10
So the parts fit together correctly. If you build without measuring, pieces might end up too big or too small.
Engineering · L1 · Measuring & Units
@openstem
Engineering · L1 · Measuring & UnitsFlashcards9 cards
What problem does an umbrella solve?1 / 9
An umbrella keeps rain off you. It solves the problem of getting wet in the rain.
Engineering · L1 · Everyday Inventions
@openstem
Engineering · L1 · Everyday InventionsFlashcards8 cards
What is a beam bridge?1 / 8
A beam bridge is just a flat plank laid across a gap, resting on a support at each end — like a wooden board across a puddle.
Engineering · L1 · Bridges for Kids
@openstem
Engineering · L1 · Bridges for Kids