Car on a Trampoline: More Kicks With Kinetic Energy

Car on a Trampoline: More Kicks With Kinetic Energy

The car drop happens near the end of the video, starting at 9:20.Even if you don't think this is awesome (c’mon, it’s empirically proven to be awesome), it's still a great source for some physics problems you can work out at home, while we’re all doing this social distancing thing.

The Elegant Mathematics of Social Distancing

The Elegant Mathematics of Social Distancing

“This is not black and white,” says Ben Lopman, an infectious disease epidemiologist at Emory University’s Rollins School of Public Health.From a mathematical perspective, determining how big a crowd is safe depends on a couple of key questions: How many people in a given area are infected with the disease?

Whoa! Is That Death Star Wreckage on That Planet?

Whoa! Is That Death Star Wreckage on That Planet?

As this equation shows, the magnitude of the gravitational force depends on the mass of each object (m1 and m2) and the distance (r ) between them.Think of the planet and space object as a system, where the total energy in the system is constant—there’s no external force acting on it.

What Will Game of Thrones Mean When It's All Over?

What Will Game of Thrones Mean When It's All Over?

Starting Sunday, HBO's Game of Thrones will air the first of six episodes that, to put it bluntly, will have to complete the story of dozens of hours of television spanning eight years. Game of Thrones ' Final Season Might Be .

Security News This Week: Did Quora Get Hacked? Top Answer: Yes

Security News This Week: Did Quora Get Hacked? Top Answer: Yes

The hack probably should have been the biggest news of the week, but for a little distracting—and important!—thing called the Mueller probe.In expectation of Robert Mueller making big moves in the investigation before the holidays, Garrett Graff spells out the 14 questions about Trump and Russia that Mueller knows the answer to.Also this week, veteran Kristofer Goldsmith revealed that foreign trolls are targeting vets on Facebook.

Fighting historic wildfires amid bad ideas and no funding

Fighting historic wildfires amid bad ideas and no funding

What’s needed is a national wildfire strategy such as the one proposed by the Canadian Council of Forest Ministers several years ago. And finally, what’s needed is for the federal government to restore funding for the Canadian Forest Service to at least 1990s levels, when it employed 2,200 people.