Everyday Physics & Science Demos Videos Hacker News Recommends — Page 2

tutorial#2419

How to Properly Heat a Pan

Rouxbe

“This youtube video explains the process”

2 HN recommenders · 2014–2024

explainer#2458

Magnetohydrodynamics - Propelling Liquid Metal with Magnets!

Tech Ingredients

“There's a great video from one of my favorite YouTube channels about Magnetohydrodynamic drives.”

2 HN recommenders · 2018–2023

demo#2493

Why Figure 8 knot is NOT hard to untie!

Hard Is Easy

“Apparently there is a wrong way of tying a figure 8, that leads to a version that is much harder to untie.”

2 HN recommenders · 2021–2022

demo#2723

How Smoking vs Vaping Affects Your Lungs ● You Must See This ! !

Chris Notap

“Anyone who tries to tell me vaping might be worse I send them to this YouTube video”

2 HN recommenders · 2019–2024

explainer#2725

Complete Solution To The Twins Paradox

minutephysics

“Minute Physics did a good couple of videos on this”

2 HN recommenders · 2018–2021

explainer#2740

This Is Your Brain On Stale Air

Tom Scott

“Tom Scott did a great video on it a while back”

2 HN recommenders · 2019–2025

explainer#2762

How a TV Works in Slow Motion - The Slow Mo Guys

The Slow Mo Guys

“This YouTube video by "The Slow Mo Guys" shows this in action”

2 HN recommenders · 2022–2026

demo#2826

Jet Fuel VS Diesel VS Gasoline how they burn and what color are they.

Just Think

“Great practical demonstration of the different flammability characteristics of some common fuels.”

2 HN recommenders · 2018–2022

demo#2835

No Body Steering Bike of the California Superbike School

superbikeschool

“It is really eye opening on how little control you have without countersteering.”

2 HN recommenders · 2021–2022

explainer#2885

MOLTEN GLASS VS Prince Rupert's Drop - Smarter Every Day 285

SmarterEveryDay

“Learn about and see how it’s made”

2 HN recommenders · 2023

explainer#2894

Thermoelectric cooling: it's not great.

Technology Connections

“they are _massively_ less efficient.”

3 HN recommenders · 2025

demo#2968

Can You Fool A Self Driving Car?

Mark Rober

“LiDAR passed all of them, while Tesla’s camera-only approach failed half.”

2 HN recommenders · 2025–2026

explainer#3012

Defeating Microwave Weapons! - Part 1

Tech Ingredients

“made an instructional video about how microwaves work and how to defend against them”

2 HN recommenders · 2022–2025

explainer#3013

High speed camera reveals why sodium explodes!

Thunderf00t

“the video has a nice balance, it's technical but not too technical”

2 HN recommenders · 2015–2024

demo#3032

Liquid Sand Hot Tub- Fluidized air bed

Mark Rober

“See this fun fluidized sand-filled jacuzzi”

2 HN recommenders · 2018–2025

demo#3059

Copper vs Pex vs SharkBite - Freeze Testing

Matt Risinger

“did a freeze comparison between copper, pex, and sharkbite fittings some time back. It was pretty interesting.”

2 HN recommenders · 2018–2022

demo#3101

Olympic Cyclist Vs. Toaster: Can He Power It?

The Toaster Challenge

“Here's a neat video of an olympic cycle sprinter powering a toaster”

3 HN recommenders · 2015–2023

explainer#3114

The simple, clever sensor behind automatic windshield wipers

Technology Connections

“Technology Connections has a good video on how traditional automobile rain sensors work”

2 HN recommenders · 2024–2026

explainer#3125

How Do Night Vision Goggles Work?

Veritasium

“You will find Veritasium's video on night vision goggles [1] very interesting.”

2 HN recommenders · 2023–2024

explainer#3137

What if you could only see the world in UV?

Veritasium

“Veritasium has a video using a special UV setup, it's pretty cool”

2 HN recommenders · 2019–2021

demo#3207

New vs Old Room Fire Final UL

jarhead96

“Not many more words needed. Just watch”

2 HN recommenders · 2017–2021

explainer#3250

Experiment! How Does An Owl Fly So Silently? | Super Powered Owls | BBC

BBC Earth

“To really appreciate how silent Owls are as compared to other birds, see this excellent video from BBC”

2 HN recommenders · 2020–2026

demo#3251

Planes clouds and vortices

flugsnug

“the spiraling wingtip vortices which can be observed in this neat video”

2 HN recommenders · 2017–2026

demo#3267

Hovering a Helicopter is Hilariously Hard - Smarter Every Day 145

SmarterEveryDay

“SmarterEveryDay has an interesting video[2] about learning to hover a helicopter”

2 HN recommenders · 2017–2021

demo#3357

Firing the Lorentz Plasma Cannon

LightningOnDemand

“You might enjoy Lightning On Demand's Lorentz Cannon”

2 HN recommenders · 2025–2026

explainer#3363

Testing if 60 minutes of silence drives you crazy

Veritasium

“Derek from Veritasium has a good video on it for the interested.”

2 HN recommenders · 2014–2019

talk#3378

BTD10: The 835kph Sailplane and Dynamic Soaring

TNG Technology Consulting GmbH

“Here's a really wonderful talk by Spencer Lisenby about the basic physics”

2 HN recommenders · 2022–2023

explainer#3386

How Do Bikes Stay Up?

minutephysics

“minutephysics had a great video about this too”

2 HN recommenders · 2016–2024

demo#3451

Tesla Valve Explained With Fire

NightHawkInLight

“a very well made demonstration of how the valve works”

2 HN recommenders · 2019–2021

explainer#3490

The LED's Challenge to High Pressure Sodium

Technology Connections

“Here's a quite good video about the pros and cons of LED vs high/low-pressure sodium street lamps”

2 HN recommenders · 2018–2021

explainer#3545

The Bizarre Behavior of Rotating Bodies

Veritasium

“Derek Muller on the youtube channel Veritasium has a good video on this”

1 HN recommenders · 2020–2025

demo#3638

DIY Scanning Electron Microscope - Overview

Applied Science

“Ben Karsnow's channel is really inspiring. With every video, he pushes the limits of what I thought it was possible to do in your garage.”

1 HN recommenders · 2015–2025

explainer#3656

The Snowflake Myth

Veritasium

“Here's a fantastic Veritasium video about snowflakes with a scientist that basically figured out all of the ways they can form”

1 HN recommenders · 2022–2023

explainer#3673

Is 5G Spelling Our DOOM?! How EM Waves Can Hurt

ElectroBOOM

“ElectroBoom has a great video that goes in depth about the electromagnetic spectrum”

1 HN recommenders · 2020–2024

demo#3728

Dangerous tattoo remover from eBay is a MILLION watt laser

styropyro

“builds insanely strong lasers with basically salvaged junk electronics.”

1 HN recommenders · 2020–2022

tutorial#3838

Air Conditioning isn't free... but we're close.

Tech Ingredients

“there are a couple good videos about it from NightHawkInLight”

1 HN recommenders · 2023–2025

demo#3840

How dangerous are magnetic items near an MRI magnet?

practiCal fMRI

“Watch this video to see the forces involved”

1 HN recommenders · 2011–2023

demo#3901

levitating frog

Graham McLeod

“If you think that's cool you should have a look at this frog”

1 HN recommenders · 2012–2014

explainer#3912

The Universe is Hostile to Computers

Veritasium

“The Universe is Hostile to Computers" by Veritasium is good video.”

1 HN recommenders · 2021–2024

explainer#3952

Why is light slower in glass? - Sixty Symbols

Sixty Symbols

“This reminds me of this Sixty Symbols video which explains why light is slower in media such as glass than in a vacuum”

1 HN recommenders · 2018–2021

explainer#3985

What if you swam in a nuclear storage pool?

xkcd's What If?

“XKCD has a good video about this.”

2 HN recommenders · 2024–2025

demo#3993

Visualizing video at the speed of light — one trillion frames per second

Massachusetts Institute of Technology (MIT)

“I think you are gonna love this”

1 HN recommenders · 2011–2025

demo#3995

.38 Special vs Prince Ruperts Drop at 170,000 FPS - Smarter Every Day 169

SmarterEveryDay

“In high speed, you can see the bullet splat against the glass and break into shards, long before the glass breaks. Really neat.”

1 HN recommenders · 2017–2023

explainer#4050

The Original Double Slit Experiment

Veritasium

“Here's the important part of the video, in my opinion”

1 HN recommenders · 2019–2021

explainer#4068

How anti-theft tags work - magnetostriction

Applied Science

“here's an interesting and informative video from Applied Science on how these tags work”

1 HN recommenders · 2017–2020

demo#4083

Can you fold paper more than 7 times with hydraulic press

Hydraulic Press Channel

“It was this paper folding video (and the guy's unapologetic Finnish accent) that launched Hydraulic Press Channel to fame.”

1 HN recommenders · 2016–2026

demo#4108

Laser diode self-mixing: Range-finding and sub-micron vibration measurement

Applied Science

“a pretty cool video where he demonstrates how a single laser diode can be used to measure miniscule vibrations”

1 HN recommenders · 2019–2025

demo#4163

Space Shuttle Thermal Tile Demonstration

Roscket Tasartir

“have a look at this video demonstrating insulating tiles as used on the space shuttle”

1 HN recommenders · 2014–2023