Hewitt-Drew-it! 43. Angular Momentum

Conservation of angular momentum, with examples, including Paul in the classroom, are examined.

Other Hewitt-Drew-it! videos

 

Coriolis Effect: IDTIMWYTIM

Does your toilet water drain differently than in the other hemisphere? Is it because of the Coriolis effect? Hank has some things to clarify about these questions, and more in this edition of I Don't Think It Means What You Think It Means.

 

5 things you should never do with a particle accelerator

Suzie Sheehy is a researcher and science communicator who specialises in particle physics and accelerator physics. She was one of many big names who gave talks at the IOP's Physics in Perspective event at the Royal Institution of Great Britain in 2013.

 

Lifting lemon: Physics to go

Instructions: Pour water into the ashtray until the water is ~1cm deep. Push three matchsticks into the slice of lemon, in the shape of a triangular pyramid, with the match heads together at the top point of the pyramid. 

Place the lemon and matchsticks in the centre of the ashtray, so that they float on the water. Light the fourth match and use it to light the other three together. Invert the pint glass over the lemon and matches, letting it sit inside the ashtray or frisbee! Watch as the lemon slice magically levitates within the pint glass!

 

Can we Predict Everything?

Einstein didn't like quantum mechanics because it wasn't able to make perfect predictions... but science is not about what you like, it's about what's true!

 

Hewitt-Drew-it! 42. Skateboard Torques

How does rotational physics explain how a skateboard is able to lift without external forces?

Other Hewitt-Drew-it! videos

 

Your Mass is NOT from Higgs Boson

The Higgs mechanism is meant to account for the mass of everything, right? Well no, only the fundamental particles, which means that electrons derive their mass entirely from the Higgs interaction but protons and neutrons, made of quarks, do not. In fact the quark masses are so small that they only make up about 1% of the mass of the proton (and a similar fraction of the neutron). The rest of the mass comes from the energy in the gluon field. Gluons are massless, but there is so much energy in the field that by E=mc^2 there is a significant amount of mass there. This is where most of your mass comes from and the mass of virtually everything around you.

 

Feyman: The Quantum Mechanical View of Reality

A  workshop with Richard Feynman.

 

Wet Washcloth In Space - What Happens When You Wring It?

International Space Station commander Chris Hadfield soaks a washcloth, gives it a twist, and...well, you'll see.