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All fields Software Mathematics Physics Chemistry Biology Engineering Astronomy Environmental Other Engineering Engineering groups

Explore STEM Content

Search the community's STEM library — free to study, yours to make your own.

Engineering

Circuits, mechanics, materials and design on openstem — flashcards, notes, quizzes, sketches and flowcharts shared by the community. Study free, or clone anything into your library.

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Engineering: explore STEM content (page 18 of 27) · openstem

Note~195 words · 1 min

Digital means two states, nothing between A logic gate takes digital inputs and produces a digital output by a fixed rule. Three gates get you started. AND: everything must be true OR: one is enough NOT: flip it Wiring a real rule A door sh

Engineering

Engineering · L3 · Digital Logic Gates

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Engineering · L3 · Digital Logic Gates

Collection4 items

01Engineering · L1 · Prototypes & Model Building

02Engineering · L1 · Prototypes: Try Small Before You Try Big

03Engineering · L1 · From Idea to Improved Prototype

+1 more

Engineering

Engineering · L1 · Prototypes & Model Building

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Engineering · L1 · Prototypes & Model Building

Flowchart7 objects

Engineering

Engineering · L1 · Levers & Seesaws: Pivoting Your Way to a Big Lift · flowchart

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Engineering · L1 · Levers & Seesaws: Pivoting Your Way to a Big Lift · flowchart

Quiz6 questions

What is a design notebook used for?

AWriting down and sketching ideas, what you tried, and what happened, so you don't forgetBStoring your lunch moneyCDrawing only finished, perfect inventionsDMeasuring how long something is

Engineering

Engineering · L1 · Keeping a Design Notebook Quiz

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Engineering · L1 · Keeping a Design Notebook Quiz

Flowchart19 objects

Engineering

Engineering · L4 · Bode plot construction: first-order low-pass filter

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Engineering · L4 · Bode plot construction: first-order low-pass filter

Collection4 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 more

Engineering

Engineering · L4 · Signals & Systems

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Engineering · L4 · Signals & Systems

Flowchart7 objects

Engineering

Engineering · L2 · Engineering Drawing & Scale Quiz · flowchart

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Engineering · L2 · Engineering Drawing & Scale Quiz · flowchart

Flowchart10 objects

Engineering

Engineering · L3 · Viscosity, Reynolds Number, and Flow Regime

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Engineering · L3 · Viscosity, Reynolds Number, and Flow Regime

Flowchart14 objects

Engineering

Engineering · L2 · Tracing a Switch-Controlled Bulb Circuit

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Engineering · L2 · Tracing a Switch-Controlled Bulb Circuit

Collection5 items

01Engineering · L1 · What Do Engineers Do?

02Engineering · L1 · The Design Process: Ask, Imagine, Build, Test

03Engineering · L1 · Design Process Quiz

+2 more

Engineering

Engineering · Design & Process

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Engineering · Design & Process

Flashcards9 cards

A 10 mm-diameter bolt carries 5000 N in single shear. Find the shear stress.1 / 9

A = π(0.005)² ≈ 7.854 × 10⁻⁵ m². τ = F/A = 5000 / 7.854 × 10⁻⁵ ≈

Engineering

Engineering · L3 · Shear Stress

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Engineering · L3 · Shear Stress

Note~353 words · 2 min

Write down what it must do, before you design it It's tempting to start sketching. But engineers gather requirements first: a written list of exactly what the finished design has to do. Without it a team can build the wrong thing for weeks,

Engineering

Engineering · L2 · Requirements Gathering

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Engineering · L2 · Requirements Gathering

Quiz6 questions

In the method of joints, why does a single joint only give two independent equilibrium equations?

ABecause trusses only ever have two membersBBecause a joint is a point, so it only balances forces in two directions (x and y) — there is no rotation equation at a pointCBecause engineers only care about vertical forcesDBecause every truss member is exactly the same length

Engineering

Engineering · L3 · Method of Joints Quiz

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Engineering · L3 · Method of Joints Quiz

Quiz7 questions

In MPC, after solving the finite-horizon optimization for u0, u1, ..., u_{N-1}, which control move is actually applied to the plant?

AOnly u0, the first move in the sequenceBThe entire sequence, open-loop, until the next horizonCThe average of all N movesDu_{N-1}, the last move in the sequence

Engineering

Engineering · L5 · Model Predictive Control — 7 Q

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Engineering · L5 · Model Predictive Control — 7 Q

Flowchart5 objects

Engineering

Engineering · L3 · Fatigue & Cyclic Loading · flowchart

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Engineering · L3 · Fatigue & Cyclic Loading · flowchart

Flashcards9 cards

What is a parallel-flow heat exchanger?1 / 9

An arrangement where both fluids enter at the same end and travel through the exchanger in the same direction, exiting at the same end.

Engineering

Engineering · L3 · Heat Exchangers

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Engineering · L3 · Heat Exchangers

Flowchart15 objects

Engineering

Engineering · L1 · Will This Tower Design Stay Stable?

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Engineering · L1 · Will This Tower Design Stay Stable?

Flashcards9 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

Engineering · L1 · Pipes & Water Flow

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Engineering · L1 · Pipes & Water Flow

Collection4 items

01Engineering · L1 · Hot Air Rises

02Engineering · L1 · Hot Air Rises

03Engineering · L1 · Why Hot Air Rises

+1 more

Engineering

Engineering · L1 · Hot Air Rises

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Engineering · L1 · Hot Air Rises

Note~231 words · 1 min

Push a square Build a square from four straws taped at the corners. Push sideways on the top corner and it leans right over into a slanted shape called a parallelogram. The straws never changed length. The CORNERS bent, like little hinges,

Engineering

Engineering · L1 · Strong Shapes: Triangles vs Squares

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Engineering · L1 · Strong Shapes: Triangles vs Squares

Flowchart17 objects

Engineering

Engineering · L2 · How Things Are Made: Molding, Casting, and Cutting · flowchart

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Engineering · L2 · How Things Are Made: Molding, Casting, and Cutting · flowchart

Flowchart3 objects

Engineering

Engineering · L2 · Cantilevers Quiz · flowchart

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Engineering · L2 · Cantilevers Quiz · flowchart

Note~500 words · 3 min

The public can't check your work People crossing a bridge or plugging in an appliance never inspect the engineering behind it. They can't. That's why the profession asks its members to hold a standard above "met the letter of the contract",

Engineering

Engineering · L3 · Ethics and Professional Responsibility

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Engineering · L3 · Ethics and Professional Responsibility

Flowchart7 objects

Engineering

Engineering · L1 · Measuring & Units Quiz · flowchart

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Engineering · L1 · Measuring & Units Quiz · flowchart

Flashcards9 cards

Why might an engineer want to reduce friction inside a machine?1 / 9

Less friction means less energy wasted as heat, less noise, and less wear on the moving parts — so the machine runs more efficiently and lasts longer.

Engineering