This Laser-Firing Truck Could Help Make Hot Cities More Livable

When you go on a road trip, you pack snacks and drinks and make sure you have good music to queue. Climate scientist Katia Lamer, on the other hand, packs party balloons loaded with atmospheric sensors, then climbs into a laser-firing observatory on wheels. Lamer—director of operations at the Brookhaven National Laboratory’s Center for Multiscale […]

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Why Can’t a Magnet-Propelled Truck Actually Work?

Finally, we have the crane itself. I left off some of the unimportant forces here—the most critical are the forces from the magnet and the cart pulling in opposite directions. All of these objects have a net force of zero. That’s the important part: With a zero net force, there will be a zero acceleration. […]

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