If Clouds Are Made of Water, How Do They Stay in the Air?

If Clouds Are Made of Water, How Do They Stay in the Air?

If it's near the surface of the Earth, this force has a magnitude equal to the product of the mass of air (m) and the gravitational field (g = 9.8 newtons per kilogram).The buoyancy force is actually the result of the air around the cube pushing against it in all directions.

The Grid Isn’t Ready for the Renewable Revolution

The Grid Isn’t Ready for the Renewable Revolution

Or extreme weather can suddenly spike the demand for energy just when the grid is least able to provide it, like during last winter’s Texas freeze and subsequent power system failure.

Could the Moon Actually Crash Toward Earth?

Could the Moon Actually Crash Toward Earth?

There's a trailer out for a new science fiction film called Moonfall, to be released in early 2022, in which the moon is about to crash into Earth.A gravitational force pulls Earth and the moon toward each other.

It’s a Good Day to Update All Your Devices. Trust Us

It’s a Good Day to Update All Your Devices. Trust Us

But if you haven’t, today is an especially good day to be on top of it, because Apple, Google, and Microsoft have all pushed security fixes in the past two days for vulnerabilities that hackers are actively exploiting.

This Tiny Robot Mimics the Mantis Shrimp's Mighty Punch

This Tiny Robot Mimics the Mantis Shrimp's Mighty Punch

Now, a team of Harvard University researchers has come up with a new biomechanical model for the mantis shrimp's mighty appendage , and it built a tiny robot to mimic that movement, according to a recent paper published in the Proceedings of the National Academy of Sciences.

The Physics of That Spinning Hug in Dua Lipa’s Music Video

The Physics of That Spinning Hug in Dua Lipa’s Music Video

Actually, just to make things easier I am going to draw the forces on a single human that is just doing a super lean back.We can add a "fake force" that's proportional to the acceleration of the car and boom—Newton's second law works again.

AI Could Enable 'Swarm Warfare' for Tomorrow's Fighter Jets

AI Could Enable 'Swarm Warfare' for Tomorrow's Fighter Jets

AI could allow multiple aircraft to “swarm” together in ways that could change the dynamics of air combat.“One of the things that really stands out is the ability to enable what you would call swarm warfare—rapidly overwhelming opponents,” says Chris Gentile, an ex–Air Force fighter pilot who is a program manager at EpiSci, a military contractor that is developing the technology for the contest, dubbed Air Combat Evolution.

A SpaceX Engineer's Dark Web Insider Trading Sparks an SEC First

A SpaceX Engineer's Dark Web Insider Trading Sparks an SEC First

The SEC says that while Jones claims he didn’t get any useful info from the group, it did spark a revelation: There was a market for insider tips, but most people couldn’t get into exclusive dark web forums.

NASA Gets a Quick Peek at a Mysterious Layer of the Sun

NASA Gets a Quick Peek at a Mysterious Layer of the Sun

The sun’s magnetic fields are massive, but within its inner layers, their forces are channeled and controlled by the pressure of the superheated plasma, convecting its heat outward like a boiling pot of tomato soup.

How to Calculate the String Angle of a Kite vs. a Balloon

How to Calculate the String Angle of a Kite vs. a Balloon

And here is the fun part—Munroe states that both a kite AND a balloon could extend over a river.So, at some value of wind speed the kite and the balloon would have a string at the same angle.

How Law Enforcement Gets Around Your Smartphone's Encryption

How Law Enforcement Gets Around Your Smartphone's Encryption

“It just really shocked me, because I came into this project thinking that these phones are really protecting user data well,” says Johns Hopkins cryptographer Matthew Green, who oversaw the research.

If You Are Going to Survive, You Must Prepare to Fail

If You Are Going to Survive, You Must Prepare to Fail

Dale was a US Air Force fighter pilot sitting in an F-117 Nighthawk stealth fighter—the black angular ones that look like a UFO—a jet that was considered by most people at the time to be pretty much invulnerable.

The Worst Hacks of 2020, a Surreal Pandemic Year

The Worst Hacks of 2020, a Surreal Pandemic Year

Such digital extortion attempts have been around for decades, but the Vastaamo situation was particularly egregious, because the stolen data, which went back roughly two years, included psychotherapy notes and other sensitive information about patients' mental health treatment.

A ‘Bulletproof’ Criminal VPN Was Taken Down in a Global Sting

A ‘Bulletproof’ Criminal VPN Was Taken Down in a Global Sting

There will be more news to come about the SolarWinds supply chain attack and possible other elements of the extensive campaign, but in the meantime officials, security practitioners, and researchers are all puzzling over questions of where to draw the line on global espionage and how to deter destructive and otherwise unacceptable hacking.

What AlphaGo Can Teach Us About How People Learn

What AlphaGo Can Teach Us About How People Learn

David Silver: The big step forward with MuZero is we don't tell it the dynamics of the environment; it has to figure that out for itself in a way that still lets it plan ahead and figure out what's going to be the most effective strategy.

Let’s Unpack the Pendulum Rocket Fallacy

Let’s Unpack the Pendulum Rocket Fallacy

In this case, that rocket will push on the top mass in whatever direction (and magnitude) it needs to keep the thing still so it can act like a pendulum.

Formulas or Code? It’s All Numbers When It Comes to Physics

Formulas or Code? It’s All Numbers When It Comes to Physics

If you aren't familiar with these numerical calculations (another name for computational physics), the basic idea is to take a problem and break it into many smaller and simpler problems.

There's No Turning Back on AI in the Military

There's No Turning Back on AI in the Military

The Air Force and Space Force had their own “move 37” moment last month during the first AI-enabled shoot-down of a cruise missile at blistering machine speeds.

What Even Is Friction, Anyway?

What Even Is Friction, Anyway?

In some way, the atoms on the surface of the wood block are interacting with the surface atoms on the table.That is to say, the frictional force pushes in a direction to try to prevent sliding.

Amazon Prime Day 2020: The 15 Best Laptop Deals (Updated)

Amazon Prime Day 2020: The 15 Best Laptop Deals (Updated)

It's still powerful though, with an Intel i7 chip, an Nvidia GeForce GTX 1660 graphics card, 18-gigabytes of RAM, a 256-gigabyte SSD, and a 15.6-inch Full HD 144-Hz display.

The Tech That's Championing the Public Good

The Tech That's Championing the Public Good

But public health requires the public’s consent: The technologies that will help us get past Covid-19 are only as valuable as the number of people who use them.

CryptoHarlem’s Founder Warns Against ‘Digital Stop and Frisk’

CryptoHarlem’s Founder Warns Against ‘Digital Stop and Frisk’

Mitchell says law enforcement agencies routinely use tools that trawl social media for posts on particular topics, and that they have been used, for example, against people protesting the killing of George Floyd by Minnesota police.“If you live in the United States and you’re exercising your rights to free speech and assembly to march and demonstrate, you might not realize that the entire time there’s a lot of data being vacuumed up and used against you,” Mitchell said.

179 Arrested in Massive Global Dark Web Takedown

179 Arrested in Massive Global Dark Web Takedown

It’s one of the largest global dark web takedowns to date: 179 arrests spread across six countries; 500 kilograms of drugs seized; $6.5 million in cash and cryptocurrency confiscated.

What Even Is ‘Coordinated Inauthentic Behavior’ on Platforms?

What Even Is ‘Coordinated Inauthentic Behavior’ on Platforms?

Like so many of the revelations about content that violates platform policies, the TPA posts were revealed not through the platforms’ own moderators, but through the intrepid reporting of journalists.

How to Use Android's Nearby Share to Send Photos and Files

How to Use Android's Nearby Share to Send Photos and Files

Photograph: GoogleAt the moment, Nearby Share is available for select Google Pixel and Samsung Galaxy phones, but Google says that because the feature is a part of Google Play Services, you do not need to wait for an over-the-air update from your manufacturer or carrier to get it.

Looking for Gravitons? Check for the ‘Buzz’

Looking for Gravitons? Check for the ‘Buzz’

Dyson’s 2013 calculation convinced many people that gravitational wave detectors were, at best, impractical probes for learning about quantum gravity.“There’s a kind of default consensus that it’s a waste of time to think about quantum effects and gravitational radiation,” said Frank Wilczek, a Nobel Prize-winning physicist at MIT who was a coauthor with Parikh on the new paper.

Hybrid Remote Work Offers the Worst of Both Worlds

Hybrid Remote Work Offers the Worst of Both Worlds

Despite recent successes with remote work, employers are reopening offices to some of their employees to encourage social bonding, reinforce culture, and increase business collaboration.If an office is the “glue”, and processes and systems don’t adapt for a remote workforce, remote team members will not feel included and will face constant communication barriers.

Airbnb Quietly Fired Hundreds of Contract Workers. I'm One of Them

Airbnb Quietly Fired Hundreds of Contract Workers. I'm One of Them

My office life resembled that of any full-time employee: I snacked on charcuterie boards and fresh ahi poke bowls, rejiggered my calendar to accommodate conflicting meetings, and cheered for employees on their work anniversaries (a peculiar Silicon Valley ritual that celebrates equity accruing).Unlike full-time employees, contract workers aren’t entitled to Airbnb’s premium health care, generous 401(k), unlimited paid vacation time, transportation coverage, and stock options.

Anonymous Stole and Leaked a Megatrove of Police Documents

Anonymous Stole and Leaked a Megatrove of Police Documents

DDOSecrets founder Emma Best tells WIRED that the hacked files came from Anonymous—or at least a source self-representing as part of that group, given that under Anonymous' loose, leaderless structure anyone can declare themselves a member."It's the largest published hack of American law enforcement agencies," Emma Best, cofounder of DDOSecrets, wrote in a series of text messages.

Zoom Reverses Course and Promises End-to-End Encryption for All Users

Zoom Reverses Course and Promises End-to-End Encryption for All Users

Crucially, to enable end-to-end encryption, free users will need to submit and verify an identifying piece of data, like a phone number.