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Engineering: explore STEM content (page 5 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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Flashcards9 cards

What does a buzzer do?1 / 9

A buzzer turns electricity into sound. Give it power, and a tiny part inside vibrates fast to make a buzzing noise.

Engineering

Engineering · L1 · Sound Makers

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Engineering · L1 · Sound Makers

Flowchart11 objects

Engineering

Engineering · L3 · R-Value & Thermal Resistance · flowchart

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Engineering · L3 · R-Value & Thermal Resistance · flowchart

Quiz10 questions

An inverting op-amp amplifier has R_in = 10 kΩ and R_f = 100 kΩ. What is the voltage gain?

A−10B+10C−0.1D+0.1

Engineering

Engineering · L4 · Circuits, Signals & Fluid Mechanics — 10 Q

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Engineering · L4 · Circuits, Signals & Fluid Mechanics — 10 Q

Note~248 words · 1 min

A frame made of triangles Why the triangle is the whole trick How the load travels Every member carries force along its own length. None of them bend, which is exactly why so little material is needed. Where trusses go Two common patterns

Engineering

Engineering · L2 · Trusses & Triangulation

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Engineering · L2 · Trusses & Triangulation

Flowchart11 objects

Engineering

Engineering · L2 · Predicting the Layer Order

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Engineering · L2 · Predicting the Layer Order

Collection5 items

01Engineering · L2 · Requirements Gathering

02Engineering · L2 · Requirements Gathering

03Engineering · L2 · Requirements Gathering

+2 more

Engineering

Engineering · L2 · Requirements Gathering

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Engineering · L2 · Requirements Gathering

Flowchart19 objects

Engineering

Engineering · L2 · Fixed Pulley vs Movable Pulley vs Block and Tackle

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Engineering · L2 · Fixed Pulley vs Movable Pulley vs Block and Tackle

Flashcards11 cards

What is the steady-flow energy equation (SFEE) for an open system?1 / 11

Q̇ − Ẇ_s = ṁ[(h₂ − h₁) + (V₂² − V₁²)/2 + g(z₂ − z₁)], where h is specific enthalpy, V is fluid velocity, z is elevation, and ṁ is mass flow rate. This is the first law applied to an open system in steady state — the basis of turbine, compressor, nozzle, and heat-exchanger analysis.

Engineering

Engineering · L4 · Engineering Thermodynamics & Fluid Mechanics

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Engineering · L4 · Engineering Thermodynamics & Fluid Mechanics

Flowchart5 objects

Engineering

Engineering · L2 · What Does a Capacitor Do? · flowchart

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Engineering · L2 · What Does a Capacitor Do? · flowchart

Flashcards7 cards

Rf = 4 kΩ, Rin = 2 kΩ. What is the non-inverting gain?1 / 7

Gain = 1 + 4/2 = 1 + 2 = 3

Engineering

Engineering · L3 · Op-Amps — Gain Calculations

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Engineering · L3 · Op-Amps — Gain Calculations

Note~498 words · 2 min

Power engineering is the layer between a circuit diagram and the physical world: stepping energy up for transmission, delivering it as three-phase, and turning it into motion. Transformers Voltage scales with the turns ratio, current scales

Engineering

Engineering · L4 · Electrical machines and power systems: transformers, three-phase, and motors

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Engineering · L4 · Electrical machines and power systems: transformers, three-phase, and motors

Note~198 words · 1 min

Engineering is a family, not a job Each branch focuses on a different kind of problem, and on a real project they work side by side. Rough test: if it pushes, spins or slides, it's mechanical. If it carries current, it's electrical. If a co

Engineering

Engineering · L2 · Which Engineer Builds What?

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Engineering · L2 · Which Engineer Builds What?

Collection4 items

01Engineering · L1 · Counting the Cost

02Engineering · L1 · Counting the Cost of a Project

03Engineering · L1 · Adding Up Project Costs

+1 more

Engineering

Engineering · L1 · Counting the Cost

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Engineering · L1 · Counting the Cost

Flowchart7 objects

Engineering

Engineering · L1 · Loading Cargo Onto a Boat

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Engineering · L1 · Loading Cargo Onto a Boat

Collection4 items

01Engineering · L1 · Bridges for Kids

02Engineering · L1 · Bridges for Kids: Beam, Arch, and Suspension

03Engineering · L1 · Choosing A Bridge Type For A Gap

+1 more

Engineering

Engineering · L1 · Bridges for Kids

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Engineering · L1 · Bridges for Kids

Flowchart11 objects

Engineering

Engineering · L1 · Building a Circuit, Step by Step

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Engineering · L1 · Building a Circuit, Step by Step

Flashcards8 cards

What makes a system linear and time-invariant (LTI), and why does that matter?1 / 8

Linear: the response to a weighted sum of inputs equals the same weighted sum of responses (superposition). Time-invariant: a shifted input produces an identically shifted output. LTI systems matter because they are fully characterised by a single function — the impulse response h(t) — from which the response to any input can be computed by convolution.

Engineering

Engineering · L4 · Signals & Systems

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Engineering · L4 · Signals & Systems

Flowchart11 objects

Engineering

Engineering · L3 · Design Trade-offs · flowchart

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Engineering · L3 · Design Trade-offs · flowchart

Flashcards8 cards

A 20 m² wall has R-13 insulation. Indoor temperature is 21 °C and outdoor is -4 °C (ΔT = 25 °C). What is the rate of heat loss through the wall? (Use R-13 ≈ 2.3 m²·°C/W)1 / 8

Q/t = A·ΔT/R = 20 × 25 / 2.3 = 500 / 2.3 ≈ 217 W.

Engineering

Engineering · L3 · R-Value & Thermal Resistance

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Engineering · L3 · R-Value & Thermal Resistance

Flashcards8 cards

What is an ideal transformer, and how do the turns ratio, voltage, and current relate?1 / 8

An ideal transformer couples two windings through a shared magnetic core with no losses. Turns ratio a = N₁/N₂. Voltage transforms directly: V₂/V₁ = N₂/N₁ = 1/a. Current transforms inversely (to conserve power): I₂/I₁ = N₁/N₂ = a. Ideal power in equals power out: V₁I₁ = V₂I₂.

Engineering

Engineering · L4 · Electrical Machines & Power Systems

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Engineering · L4 · Electrical Machines & Power Systems

Flowchart9 objects

Engineering

Engineering · L2 · Identifying a Lever's Class

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Engineering · L2 · Identifying a Lever's Class

Flowchart9 objects

Engineering

Engineering · L2 · Pressure & Fluids in Pipes · flowchart

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Engineering · L2 · Pressure & Fluids in Pipes · flowchart

Collection5 items

01Engineering · L2 · What Makes a Cantilever

02Engineering · L2 · Cantilevers in the Real World

03Engineering · L2 · Cantilevers

+2 more

Engineering

Engineering · L2 · Cantilevers

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Engineering · L2 · Cantilevers

Collection5 items

01Engineering · L3 · Center of Mass & Stability

02Engineering · L3 · Center of Mass & Stability

03Engineering · L3 · Center of Mass & Stability

+2 more

Engineering

Engineering · L3 · Center of Mass & Stability

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Engineering · L3 · Center of Mass & Stability

Plot1 plot · 1 param

Engineering

Step Response with Overshoot: 1 − e^(−x)·cos(b·x)

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Step Response with Overshoot: 1 − e^(−x)·cos(b·x)

Quiz6 questions

What actually pushes water through a pipe from one end to the other?

AA difference in pressureBThe color of the pipeCThe water's own memory of where it came fromDNothing — water moves through pipes on its own with no cause

Engineering