Make it yours.Save notes, decks & boards to your own library.

openstem

Explore

Spaces

My Library

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.

Content Groups1

Loading…

loading…

About Privacy Terms of Service© openstem

We use privacy-friendly product analytics (no session recording, PII masked) to improve OpenStem. Load analytics? Privacy Policy

openstem

Explore

Groups Favorites

Collections Notes Flashcards Quizzes Sketches Flowcharts Plots Molecules

Make it yours.Save notes, decks & boards to your own library.

Get started Sign in

Explore Groups Favorites

Engineering: explore STEM content (page 2 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.

Content Groups1

Loading…

Flowchart11 objects

Engineering

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

@openstem

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

Flowchart14 objects

Engineering

Engineering · L4 · Closed-loop feedback control system block diagram

@openstem

Engineering · L4 · Closed-loop feedback control system block diagram

Quiz6 questions

A project needs 300 bricks at $0.40 each, plus $250 for labor. What is the total cost?

A$120B$370C$250D$550

Engineering

Engineering · L3 · Cost Estimation & Budgeting

@openstem

Engineering · L3 · Cost Estimation & Budgeting

Note~79 words · 1 min

Four steps engineers follow Failing the test isn't the end. It's the reason you built the thing: to find out what to change before it matters.

Engineering

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

@openstem

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

Note~414 words · 2 min

Break the project into tasks A task has to be small enough that you can estimate a duration and say clearly when it's finished. "Build the treehouse" can't be scheduled. "Cut the wood to size" can. Each task then needs a duration, based on

Engineering

Engineering · L3 · Project Scheduling

@openstem

Engineering · L3 · Project Scheduling

Plot1 plot · 1 param

Engineering

RC Charging: V(t) = 1 − e^(−t/τ)

@openstem

RC Charging: V(t) = 1 − e^(−t/τ)

Note~323 words · 2 min

Nothing is best at everything Stronger usually means heavier. Cheaper usually means less durable. Faster usually means riskier. Engineering is deciding which of those matters most for THIS job, and accepting the bill for that choice. Constr

Engineering

Engineering · L3 · Design Trade-offs

@openstem

Engineering · L3 · Design Trade-offs

Plot1 plot · 1 param

Engineering

Charge Stored vs. Voltage: Q = C·V

@openstem

Charge Stored vs. Voltage: Q = C·V

Collection12 items

01Engineering · L2 · Gears, Pulleys, and Circuits

02Engineering · L2 · A Simple Electric Circuit

03Engineering · L2 · Circuits and Gears Quiz

+9 more

Engineering

Engineering · Electrical & Control

@openstem

Engineering · Electrical & Control

Collection2 items

01Engineering · L5 · Turbulence: Reynolds Decomposition & Energy Cascade

02Engineering · L5 · Nonlinear Dynamics: Lyapunov Stability & Bifurcations

Engineering

Engineering · Fluids & Thermal

@openstem

Engineering · Fluids & Thermal

Flowchart5 objects

Engineering

Engineering · L2 · Matching Tools to Lever Classes · flowchart

@openstem

Engineering · L2 · Matching Tools to Lever Classes · flowchart

Flowchart5 objects

Engineering

Engineering · L3 · Design Trade-offs · flowchart

@openstem

Engineering · L3 · Design Trade-offs · flowchart

Quiz6 questions

What causes a solid material to expand when it is heated?

AThe atoms themselves grow largerBIncreased atomic vibration pushes neighboring atoms slightly farther apart on averageCThe material absorbs extra atoms from the surrounding airDChemical bonds break and reform at a larger spacing

Engineering

Engineering · L3 · Thermal Expansion

@openstem

Engineering · L3 · Thermal Expansion

Flashcards5 cards

What is the weak (variational) form of a BVP, and why is it preferred over the strong form in FEM?1 / 5

The weak form is obtained by multiplying the PDE by a test function v in a suitable Sobolev space and integrating by parts to transfer derivatives off the solution onto v. It requires only square-integrable first derivatives (H¹ regularity) rather than pointwise second derivatives, allowing piecewise-polynomial (finite element) approximations that would violate the strong form. Natural (Neumann) boundary conditions are incorporated automatically during integration by parts.

Engineering

Engineering · L5 · Finite Element Method

@openstem

Engineering · L5 · Finite Element Method

Collection4 items

01Engineering · L2 · Pressure & Fluids in Pipes

02Engineering · L2 · Pressure & Fluids in Pipes

03Engineering · L2 · Water Tower Height Becomes Pressure

+1 more

Engineering

Engineering · L2 · Pressure & Fluids in Pipes

@openstem

Engineering · L2 · Pressure & Fluids in Pipes

Quiz6 questions

What is the fulcrum of a lever?

AThe fixed point the lever pivots, or tips, aroundBThe heaviest part of the leverCThe part of the lever farthest from where you pushDA wheel attached to the lever

Engineering