How does fire make tea bags fly? 🔥☕️
Alex Dainis demonstrates how lighting a tea bag causes the air inside to heat up, expand, and rush out. Just fold open a few empty tea bags into tubes on a baking sheet, then light the top with an adult and a fire extinguisher handy. The now-less-dense air inside sends the bag rocketing upward, similar to how a hot air balloon works, except this one's a one way trip once it burns.
Rainwater is not as clean as you think! 🌧️
Quinten Geldhof, also known as Microhobbyist, put a drop of rainwater under the microscope to show what each drop carries. For a raindrop to form, it needs to condense around tiny particles in the atmosphere called condensation nuclei. As the droplet falls, it can pick up pollen, fungal spores, smoke particles, and more. If you’re ever tempted to drink rainwater, don’t forget to treat and filter it first!
Hi everyone,
Working with acrylamide a couple of drops escaped from serological pipet on the tissue.
I think it was max of 50 ul.
When I've asked our technical, she just said to throw if in the waste (no special hazardous waste for acrylamide).
I've packed it throughly in multiple plastics. But now I'm not sure if it was right.
I guess the waste gets burned, but still. What would you do?
Probably a stupid question.
You can make an electrical circuit on paper with no wires required! ✏️
Alex Dainis explains pencil lead isn’t actually lead, but actually graphite and clay. Graphite is a crystal made of layers of carbon atoms which are good at conducting electricity. When drawing on the paper, the layers of graphite turn the drawing into a functional circuit!
What really happens to a helium balloon after it floats away? 🎈☁️
Greg Wolf recreates a helium balloon’s journey to the edge of space using a vacuum chamber. As the balloon rises through Earth’s atmosphere, the surrounding air pressure drops, allowing the helium gas inside to expand until the balloon reaches its limit and pops! 💥
How does a bar of soap grow into a fluffy cloud? 🧼
Alex Dainis explains how Charles's law transforms a bar of Ivory soap! The bar contains air pockets from being whipped during its production, which expands into a cloud when heated. This happens because as gas increases in temperature, then it will equally increase in volume if the pressure is the same.