What can you do with 100 battery-powered toy cars? Why does a rocket go up when its thrusters are pointing down? Why should you carry your grocery bags at your elbows instead of in your hands? The answers to these questions and more lie ahead.
The Little Shop team experiments with putting different objects in different fluids and seeing which float. Helium filled bubbles in the air and granite in mercury metal! Does it float?
There’s nothing intrinsically “floaty” about helium. You can make a helium balloon that sinks, if it’s cold enough, as we see in this video.