#stem — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #stem, aggregated by home.social.
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Alright, future engineers!
**Normal Distribution:** A common, bell-shaped probability distribution where data clusters around the mean.
Ex: Human heights, test scores. Mean = Median = Mode at the center!
Pro-Tip: Crucial for modeling & predicting real-world outcomes.
#Stats #Probability #STEM #StudyNotes -
Alright, future engineers!
**Cartesian Product:** A set of all possible ordered pairs where the first element is from the first set & the second from the second.
Ex: A={1,2}, B={a,b} -> AxB = {(1,a), (1,b), (2,a), (2,b)}
Pro-Tip: `|AxB| = |A| * |B|`. Essential for combining domains!
#SetTheory #DiscreteMath #STEM #StudyNotes -
Alright, future engineers!
**Cartesian Product:** A set of all possible ordered pairs where the first element is from the first set & the second from the second.
Ex: A={1,2}, B={a,b} -> AxB = {(1,a), (1,b), (2,a), (2,b)}
Pro-Tip: `|AxB| = |A| * |B|`. Essential for combining domains!
#SetTheory #DiscreteMath #STEM #StudyNotes -
Alright, future engineers!
**Kinetic Energy (KE):** Energy an object has due to its motion.
Ex: `KE = 0.5 * m * v^2`. A moving car has KE.
Pro-Tip: It's a scalar value & always positive! Direction doesn't matter, only speed.
#Physics #Energy #STEM #StudyNotes -
Alright, future engineers!
**Kinetic Energy (KE):** Energy an object has due to its motion.
Ex: `KE = 0.5 * m * v^2`. A moving car has KE.
Pro-Tip: It's a scalar value & always positive! Direction doesn't matter, only speed.
#Physics #Energy #STEM #StudyNotes -
Maxwell's Cradle II Kit
Maxwell's Cradle II is A desktop toy that shows the power of magnetism. A steel ball runs on a slightly curved acrylic track, being given a small "kick" by the electromagnetic coil in the center.
https://extkits.co.uk/maxwells-cradle-kit-ii
#kits #makers #stem #science -
Maxwell's Cradle II Kit
Maxwell's Cradle II is A desktop toy that shows the power of magnetism. A steel ball runs on a slightly curved acrylic track, being given a small "kick" by the electromagnetic coil in the center.
https://extkits.co.uk/maxwells-cradle-kit-ii
#kits #makers #stem #science -
Alright, future engineers!
**Modulo Arithmetic:** The remainder when an integer is divided by another.
Ex: `17 mod 5 = 2` (17 / 5 leaves 2).
Pro-Tip: Think clock arithmetic! Crucial for cryptography, hashing, and cyclic systems.
#DiscreteMath #NumberTheory #STEM #StudyNotes -
Styrofoam has spent decades acting immortal. Now fungi acting like a real fun guy - edits the ending. Waiting for the biomemetic answer for carbon capture. https://www.sciencealert.com/gut-fungi-from-a-common-pest-can-chew-holes-in-styrofoam #STEM #scifi
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Styrofoam has spent decades acting immortal. Now fungi acting like a real fun guy - edits the ending. Waiting for the biomemetic answer for carbon capture. https://www.sciencealert.com/gut-fungi-from-a-common-pest-can-chew-holes-in-styrofoam #STEM #scifi
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Alright, future engineers!
**Derivative:** The instantaneous rate of change of a function. It's the slope of the tangent line at any point.
Ex: Power Rule: `d/dx(x^n) = n*x^(n-1)`
Pro-Tip: It's your go-to tool for finding max/min values (optimization)!
#Calculus #Derivatives #STEM #StudyNotes -
Alright, future engineers!
**Dot Product:** A scalar value measuring how much two vectors point in the same direction.
Ex: For `u=[1,2], v=[3,4] -> u.v = (1*3)+(2*4)=11`.
Pro-Tip: If `u.v = 0`, the vectors are orthogonal (perpendicular)!
#LinearAlgebra #VectorMath #STEM #StudyNotes -
Alright, future engineers!
**Dot Product:** A scalar value measuring how much two vectors point in the same direction.
Ex: For `u=[1,2], v=[3,4] -> u.v = (1*3)+(2*4)=11`.
Pro-Tip: If `u.v = 0`, the vectors are orthogonal (perpendicular)!
#LinearAlgebra #VectorMath #STEM #StudyNotes -
#OpenSource #DIY scanning tunneling #microscope:
-based on #ESP32 / #Python
-cost: 600 €GitHub: https://github.com/lemonspurple/DIY-Scanning-Tunneling-Microscope
Reddit: https://www.reddit.com/r/selbermachen/comments/1vo4ldy/open_source_diyrastertunnelmikroskop_esp32/
FrOSCon 2026: https://froscon.org/programm/aussteller/#DIYbio #DIYchem #lab #instruments #microscopy #imaging #hackerspace #STEM #EDU #MINT
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#OpenSource #DIY scanning tunneling #microscope:
-based on #ESP32 / #Python
-cost: 600 €GitHub: https://github.com/lemonspurple/DIY-Scanning-Tunneling-Microscope
Reddit: https://www.reddit.com/r/selbermachen/comments/1vo4ldy/open_source_diyrastertunnelmikroskop_esp32/
FrOSCon 2026: https://froscon.org/programm/aussteller/#DIYbio #DIYchem #lab #instruments #microscopy #imaging #hackerspace #STEM #EDU #MINT
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Alright, future engineers!
**Standard Deviation (SD):** Measures how spread out data points are from the mean. Ex: Test scores avg 75. SD=5 means most scores are near 75. SD=15 means scores vary widely. Pro-Tip: A small SD indicates data consistency/precision!
#Stats #DataAnalysis #STEM #StudyNotes -
Alright, future engineers!
**Logarithms:** The inverse of exponentiation. They tell you what power a base needs to become a specific number.
Ex: `log_b(x) = y` is equivalent to `b^y = x`. So `log_2(8)=3` means `2^3=8`.
Pro-Tip: Use them to solve for variables *stuck in exponents*!
#Algebra #MathTips #STEM #StudyNotes -
Alright, future engineers!
**Logarithms:** The inverse of exponentiation. They tell you what power a base needs to become a specific number.
Ex: `log_b(x) = y` is equivalent to `b^y = x`. So `log_2(8)=3` means `2^3=8`.
Pro-Tip: Use them to solve for variables *stuck in exponents*!
#Algebra #MathTips #STEM #StudyNotes -
Alright, future engineers!
**Graph:** A set of nodes (vertices) linked by connections (edges).
Ex: Friends in a social network are nodes, friendships are edges.
Pro-Tip: Use graphs to model relationships & find optimal paths/flows.
#GraphTheory #DiscreteMath #STEM #StudyNotes -
Alright, future engineers!
**Power Set:** The set of all possible subsets of a given set.
Ex: For A={1,2}, P(A) = {{}, {1}, {2}, {1,2}}.
Pro-Tip: If a set has 'n' elements, its power set will always have 2^n elements. Count 'em!
#SetTheory #DiscreteMath #STEM #StudyNotes -
Alright, future engineers!
**Power Set:** The set of all possible subsets of a given set.
Ex: For A={1,2}, P(A) = {{}, {1}, {2}, {1,2}}.
Pro-Tip: If a set has 'n' elements, its power set will always have 2^n elements. Count 'em!
#SetTheory #DiscreteMath #STEM #StudyNotes -
It's SciAnts News Friday! Join us as we discuss the cool science news of the week! New species, dolphin tools, bee counting, glyco-RNA, and more!
9pm EDT
#science #twitch #TwitchPartner #live #stem #sciants #livestream #scicomm #twitchambassador
twitch.tv/sciants_Stre... -
It's SciAnts News Friday! Join us as we discuss the cool science news of the week! New species, dolphin tools, bee counting, glyco-RNA, and more!
9pm EDT
#science #twitch #TwitchPartner #live #stem #sciants #livestream #scicomm #twitchambassador
twitch.tv/sciants_Stre... -
Alright, future engineers!
**Trapezoidal Rule:** Approximates definite integrals by summing areas of trapezoids under the curve.
Ex: For `y=f(x)`, area over `[a,b]` is `~ (b-a)/2 * (f(a)+f(b))`.
Pro-Tip: Use more trapezoids (smaller `h`) for better accuracy!
#NumericalIntegration #CalcHacks #STEM #StudyNotes -
Botanical illustrations by women shape our knowledge of Australia’s flora
Stepping into Philippa Nikulinsky’s studio feels like a peek inside her mind. From her desk overlooking the garden,…
#NewsBeep #News #Australia #Art #arthistory #arttechniques #AU #Australianhistory #botanicgardens #botanicalillustration #botanicalillustrator #Botany #flockton #MargaretFlockton #naturalhistory #scottsisters #stem #Sydney #WesternAustralia #womeninscience #womeninstem
https://www.newsbeep.com/au/855268/ -
Botanical illustrations by women shape our knowledge of Australia’s flora
Stepping into Philippa Nikulinsky’s studio feels like a peek inside her mind. From her desk overlooking the garden,…
#NewsBeep #News #Australia #Art #arthistory #arttechniques #AU #Australianhistory #botanicgardens #botanicalillustration #botanicalillustrator #Botany #flockton #MargaretFlockton #naturalhistory #scottsisters #stem #Sydney #WesternAustralia #womeninscience #womeninstem
https://www.newsbeep.com/au/855268/ -
Alright, future engineers!
**Interleaving:** Mixing different problem types or topics in one study session.
Ex: Study Ch 1 Calc, then Ch 3 Physics, then Ch 2 Diff Eq.
Pro-Tip: Boosts problem-solving flexibility by forcing your brain to discriminate strategies!
#StudySmart #BrainHacks #STEM #StudyNotes -
Alright, future engineers!
**Spaced Repetition:** Reviewing material at increasing intervals to move info to long-term memory.
Ex: Study a topic today, then in 3 days, 7 days, 14 days.
Pro-Tip: Use flashcard apps (Anki!) to automate your personalized review schedule!
#StudySmart #MemoryHacks #STEM #StudyNotes -
AI designs viruses that work in a lab - still no idea what our 7-11 hot dogs are made of. https://www.bbc.com/news/articles/c5y3j3ngevmo #STEM #scifi
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AI designs viruses that work in a lab - still no idea what our 7-11 hot dogs are made of. https://www.bbc.com/news/articles/c5y3j3ngevmo #STEM #scifi
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Alright, future engineers!
**Work (W):** Energy transferred when a force causes displacement.
Ex: `W = F * d * cos(theta)`. Pushing a box.
Pro-Tip: Only the force component *parallel* to the displacement does work! Perpendicular forces do none.
#Mechanics #EnergyTransfer #STEM #StudyNotes -
The detour: why China's best STEM students are landing in Singapore
Like and share if you enjoyed this.
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Alright, future engineers!
**Determinant:** A single scalar value derived from a square matrix.
Ex: For `[[a,b],[c,d]]`, `det = ad - bc`.
Pro-Tip: If `det = 0`, the matrix is NOT invertible (no unique solution for systems!).
#LinearAlgebra #MatrixTips #STEM #StudyNotes -
Alright, future engineers!
**Determinant:** A single scalar value derived from a square matrix.
Ex: For `[[a,b],[c,d]]`, `det = ad - bc`.
Pro-Tip: If `det = 0`, the matrix is NOT invertible (no unique solution for systems!).
#LinearAlgebra #MatrixTips #STEM #StudyNotes -
👋 Welcome to Arboles UK — suppliers of laboratory equipment since 1997.
We supply everything for a lab fit-out, trusted by schools, universities & research facilities across the world!
Laboratory Water Taps: https://www.arboles.co.uk/product-category/laboratory-taps/laboratory-water-taps/
Laboratory Gas Taps: https://www.arboles.co.uk/product-category/laboratory-taps/laboratory-gas-taps/
Vulcathene Chemical Drainage: https://www.arboles.co.uk/product-category/vulcathene-chemical-drainage/
Emergency Showers: https://www.arboles.co.uk/product-category/emergency-showers-eyewashes/emergency-showers/
BSI, WRAS & ANSI certified.
#LabEquipment #Laboratory #STEM #Science #Vulcathene #HealthAndSafety
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👋 Welcome to Arboles UK — suppliers of laboratory equipment since 1997.
We supply everything for a lab fit-out, trusted by schools, universities & research facilities across the world!
Laboratory Water Taps: https://www.arboles.co.uk/product-category/laboratory-taps/laboratory-water-taps/
Laboratory Gas Taps: https://www.arboles.co.uk/product-category/laboratory-taps/laboratory-gas-taps/
Vulcathene Chemical Drainage: https://www.arboles.co.uk/product-category/vulcathene-chemical-drainage/
Emergency Showers: https://www.arboles.co.uk/product-category/emergency-showers-eyewashes/emergency-showers/
BSI, WRAS & ANSI certified.
#LabEquipment #Laboratory #STEM #Science #Vulcathene #HealthAndSafety
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Alright, future engineers!
**Newton's Third Law:** For every action, there is an equal & opposite reaction force.
Ex: You push a wall, the wall pushes back on you.
Pro-Tip: These forces act on *different* objects, never on the same one! #Physics #N3L #STEM #StudyNotes -
🧑🤝🧑 People who feel content in their friendships are more likely to report better physical and mental health
✨Follow the link for more information on this story✨
https://www.scimex.org/newsfeed/your-good-friends-are-keeping-you-feeling-healthy-and-happy#science #sciencenews #research #stem #facts #knowledge #sciencefacts #friends #mentalhealthawareness
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🐈 This week's #ExpertSpotlight is Adelaide Uni's Dr Julia Henning
🐕 Julia is an animal welfare researcher with specialties in animal behaviour and their emotions🐶😺
More here: https://www.scimex.org/experts?name=julia-henning&a=888473
#science #sciencenews #research #stem #facts #knowledge #sciencefacts
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Physicists find major clue to matter’s biggest mystery https://www.scientificamerican.com/article/physicists-find-major-clue-to-matters-biggest-mystery/ #astronomy #physics #science #STEM
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Extreme weather is making work difficult for many people – this is what needs to change https://theconversation.com/extreme-weather-is-making-work-difficult-for-many-people-this-is-what-needs-to-change-289273 #environment #climatechange #sustainability #science #STEM
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An astronomer on what it’s really like to stargaze for a living https://theconversation.com/an-astronomer-on-what-its-really-like-to-stargaze-for-a-living-288451 #astronomy #science #STEM
