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Mary, Mass and Melting

Our first T-shirt winner, Mary Wild, joins us to chat about helping Charlie with mass, weight and gravity and also to share a practical she loves: Specific Latent Heat of fusion for Ice.

S02E06 Timestamps

  • Introducing our guest Mary Wild (@MaryWild) @ 01:10
  • Physics in the News – Static Spiders @ 02:15
  • Charlie’s audio diary @ 05:06
  • Mass and Weight @ 07:00
  • Forces at a Distance @ 12:30
  • Weightlessness @ 16:40
  • Mary’s Practical In Memoriam (PIM) Specific Latent Heat (Fusion) of Ice @ 21:09

Summary

We are joined by Mary Wild, a teacher in West Sussex. She kicks of with a Physics in the News that she fears might not be recent: Spiders use electrostatics to float! We then hear from Charlie the non-specialist who poses some tricky questions about forces: mass ad weight and non-contact forces.

Mary likes to show the Hammer and Feather dropped on the Moon (Brian Cox updates it in this video) and Adam Hart-Davis dropping tomatoes (Thomas can’t find that video). Stephen Hawking on the Vomit Comet. @DanWestPhD found Robin’s favourite video on gravity courtesy of the excellent channel Veritasium.

We close with Mary’s favourite demo/practical. Determining the specific latent heat of fusion for Ice -> Water by melting ice in a funnel using an immersion heater. Don’t forget to run it without the heater and subtract the volume of water melted by the room!

Ways to teach… Ionising Radiation

Please share your ideas about teaching Ionising Radiation. Tweet us @physicstp with the hash tag #tptpir , use the contact form below, our Instagram account @physics_teaching_podcast or email us contact at thephysicsteacohingpodcast dot com! After tweeting about this we already have seen a brilliant video about dealing with radiation issues in Russia (Thank you David Cotton @Newmanphysics).

Join in!

Please share ideas or successes – or indeed questions – on our Facebook Page: https://fb.me/physicstp .  You can also message us via our website contact form at the.physicsteachingpodcast.com, Twitter @physicstp, email using  the address given in the podcast (if we remember) or by leaving a voice memo using WhatsApp or Telegram to the phone number in our Twitter profile, +44 7898 814716 (don’t call the number, nobody will answer, just hold down the microphone icon and speak your message or upload an mp3 or ogg). Don’t forget to tell us your name because we may use your audio in a future episode.

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6. What happens when your jelly won’t hold your weight? Is it time to lose some mass?

Jelly chair aftermath

Thomas and Robin got together in the same room for a chat this week. Don’t worry, as a good physicist and a good engineer they avoided eye contact*. The big news last week was the redefinition of the kilogram which was originally based on the mass of Napoleon’s leg**, but latterly on a  lump of metal held in what looked suspiciously like a cake container. So we discussed misconceptions about mass and weight and about one of Thomas’ favourite experiments: the jelly chair.

*Well, that’s an unhelpful stereotype!  In fact we were highly empathetic and talked about our feelings extensively.

**completely made up

Competition! 

Now we have listeners, AND an Instagram page (@physics_teaching_podcast) we thought we would encourage you to share the podcast by having our first competition. Win a beautiful podcast T-shirt (in the colour of your choice) by interacting! To win, tell us why you like listening. There are many ways to do this:

Thomas and Robin will pick a winner in a couple of weeks.

It remains an enthralling and inspiring adventure making this podcast for you.  You’ve already taken it in directions we weren’t expecting; it really is your podcast, so please get in touch: teachers of physics are our very favourite breed of hero!

Join in!

Please share ideas or successes – or indeed questions – on our Facebook Page: https://fb.me/physicstp .  You can also message us via our website contact form at the.physicsteachingpodcast.com, Twitter @physicstp, email using  the address given in the podcast (if we remember) or by leaving a voice memo using WhatsApp or Telegram to the phone number in our Twitter profile, +44 7898 814716 (don’t call the number, nobody will answer, just hold down the microphone icon and speak your message or upload an mp3 or ogg). Don’t forget to tell us your name because we may use your audio in a future episode.

Music

The music is used under the Attribution-NonCommercial 3.0 International License

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