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Engineering: explore STEM content (page 23 of 27) · openstem

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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Flashcards6 cards

How does an automatic door know when to open?1 / 6

A motion sensor near the door detects a person approaching and sends a signal that tells the motor to open the door.

Engineering

Engineering · L2 · Everyday Feedback Devices

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Engineering · L2 · Everyday Feedback Devices

Flashcards8 cards

A backpack design lists: "must fit in an airplane's overhead bin" and "has a hidden pocket for sunglasses." Which requirement, if missed, means the design has failed its purpose?1 / 8

Not fitting in the overhead bin — that's the must-have. A traveler who can't carry the bag onto the plane has a design that failed its core purpose, even if the hidden pocket is a nice touch.

Engineering

Engineering · L2 · Requirements Gathering

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Engineering · L2 · Requirements Gathering

Quiz6 questions

Which discipline designs machines with moving parts, like engines and gears?

ACivilBMechanicalCChemicalDElectrical

Engineering

Engineering · L2 · Engineering Disciplines Quiz

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Engineering · L2 · Engineering Disciplines Quiz

Flashcards9 cards

What is a truss?1 / 9

A truss is a framework built entirely out of straight members joined into triangles. Roofs, bridges, cranes, and towers all use trusses to stay strong while using less material.

Engineering

Engineering · L2 · Trusses & Triangulation

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Engineering · L2 · Trusses & Triangulation

Flowchart5 objects

Engineering

Engineering · L3 · Flow Rate & Continuity Quiz · flowchart

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Engineering · L3 · Flow Rate & Continuity Quiz · flowchart

Flashcards6 cards

AND gate: A = 1, B = 1. What is the output?1 / 6

1 — both inputs are 1, so the AND gate outputs 1.

Engineering

Engineering · L3 · Digital Logic Gates — Truth Table Practice

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Engineering · L3 · Digital Logic Gates — Truth Table Practice

Flashcards10 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

Engineering · L1 · Measuring & Units

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Engineering · L1 · Measuring & Units

Flowchart15 objects

Engineering

Engineering · L4 · PID control: tuning, anti-windup, and practical design · flowchart

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Engineering · L4 · PID control: tuning, anti-windup, and practical design · flowchart

Flashcards9 cards

What is a cantilever?1 / 9

A cantilever is a beam or structure that is fixed (supported) at only one end and sticks out into open space, free and unsupported at the other end.

Engineering

Engineering · L2 · What Makes a Cantilever

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Engineering · L2 · What Makes a Cantilever

Flashcards8 cards

Write the lift and drag equations, and name every term.1 / 8

L = ½ρV²S·C_L and D = ½ρV²S·C_D. ρ = air density, V = airspeed, S = reference (wing planform) area, C_L and C_D are the dimensionless lift and drag coefficients that capture the effect of shape and angle of attack. Both forces scale with the square of airspeed.

Engineering

Engineering · L4 · Aerodynamics

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Engineering · L4 · Aerodynamics

Note~198 words · 1 min

Starting is harder than continuing Designing friction out The motivation is always the same: friction costs energy as heat and wears parts down. Designing friction in

Engineering

Engineering · L2 · Friction in Design

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Engineering · L2 · Friction in Design

Note~323 words · 2 min

Strong form: what you'd like to solve That's the classical statement, and it demands u ∈ C². Two continuous derivatives everywhere, which is more than most real solutions have and far more than any piecewise-linear approximation can offer.

Engineering

Engineering · L5 · FEM: From Strong Form to Ku = f

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Engineering · L5 · FEM: From Strong Form to Ku = f

Note~277 words · 1 min

Ohm's law Across most conductors, voltage and current are directly proportional. Resistance is the constant between them. Power, three ways Substitute Ohm's law into that and two more forms fall out: Why wires warm up Slide the current belo

Engineering

Engineering · L3 · Ohm's Law & Electrical Power

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Engineering · L3 · Ohm's Law & Electrical Power

Plot1 plot · 2 params

Engineering

Stress–Strain Curve

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Stress–Strain Curve

Flowchart11 objects

Engineering

Engineering · L2 · How a Swamp Cooler Cools the Air

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Engineering · L2 · How a Swamp Cooler Cools the Air

Flowchart7 objects

Engineering

Engineering · L1 · How a Lever Works

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Engineering · L1 · How a Lever Works

Collection4 items

01Engineering · L2 · What Does a Capacitor Do?

02Engineering · L2 · Capacitors: Quick Storage, Quick Release

03Engineering · L2 · A Camera Flash Capacitor Cycle

+1 more

Engineering

Engineering · L2 · Capacitors: Quick Storage

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Engineering · L2 · Capacitors: Quick Storage

Collection4 items

01Engineering · L1 · Dressing for Weather

02Engineering · L1 · Dressing for Weather

03Engineering · L1 · Choosing an Outfit for the Weather

+1 more

Engineering

Engineering · L1 · Dressing for Weather

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Engineering · L1 · Dressing for Weather

Flashcards8 cards

What is the fundamental difference between subtractive, additive, and forming manufacturing processes?1 / 8

Subtractive: material is removed from a solid block (milling, turning, drilling) to reach the final shape. Additive: material is built up layer by layer (3D printing) from a digital model. Forming: a fixed volume of material is plastically deformed into shape (forging, rolling, stamping) with no material added or removed.

Engineering

Engineering · L4 · Manufacturing Processes & GD&T

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Engineering · L4 · Manufacturing Processes & GD&T

Flowchart19 objects

Engineering

Engineering · L4 · Stress-strain curve: ductile metal vs brittle ceramic

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Engineering · L4 · Stress-strain curve: ductile metal vs brittle ceramic

Note~265 words · 1 min

Bending moment A beam carries load across its length: a joist, a girder, a shelf. The internal turning effect trying to bend it is the bending moment. A diving board is a cantilever, so its maximum moment is at the fixed end. That's exactly

Engineering

Engineering · L3 · Beam Bending & Moment of Inertia

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Engineering · L3 · Beam Bending & Moment of Inertia

Note~416 words · 2 min

A car suspension, a building floor, a turbine blade, a phone speaker: all of them start as one mass on one spring with one damper. Get that model's behaviour into your bones and the rest of vibration analysis is bookkeeping. Free vibration

Engineering

Engineering · L4 · Mechanical vibrations: natural frequency, damping, and resonance

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Engineering · L4 · Mechanical vibrations: natural frequency, damping, and resonance

Note~230 words · 1 min

Why rolling beats sliding Drag a heavy box across the floor and it scrapes and catches. That scraping is friction, fighting your push. Put the box on a wagon and it rolls almost by itself. The wheel-and-axle A wheel isn't only for rolling.

Engineering

Engineering · L1 · Wheels & Axles: Rolling and Turning Made Easy

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Engineering · L1 · Wheels & Axles: Rolling and Turning Made Easy

Collection5 items

01Engineering · L2 · Strength and Flexibility

02Engineering · L2 · Hardness and Choosing Materials

03Engineering · L2 · Material Properties: Strength, Flexibility, Hardness

+2 more

Engineering

Engineering · L2 · Material Properties

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Engineering · L2 · Material Properties

Flowchart9 objects

Engineering

Engineering · L3 · Cost Estimation & Budgeting · flowchart

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Engineering · L3 · Cost Estimation & Budgeting · flowchart

Flowchart16 objects

Engineering

Engineering · L3 · DFM Bracket Redesign

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Engineering · L3 · DFM Bracket Redesign

Flowchart6 objects

Engineering

Engineering · L2 · Trusses & Triangulation · flowchart

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Engineering · L2 · Trusses & Triangulation · flowchart

Quiz6 questions

A failure mode is rated Severity 6, Occurrence 5, Detection 4. What is its Risk Priority Number (RPN)?

A30B20C15D120

Engineering

Engineering · L3 · Failure Mode and Effects Analysis

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Engineering · L3 · Failure Mode and Effects Analysis

Quiz6 questions

What determines whether an object stays standing or tips over?

AWhether its total weight is above a certain amountBWhether a vertical line down from its center of mass falls inside its base of supportCWhether it is made of a dense materialDWhether its surface is smooth

Engineering

Engineering · L3 · Center of Mass & Stability

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Engineering · L3 · Center of Mass & Stability

Flowchart10 objects

Engineering

Engineering · L3 · Viscosity in Engineering Practice · flowchart

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Engineering · L3 · Viscosity in Engineering Practice · flowchart

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