9. A lemon-powered spaceship

Curious Cases

BBC

Technology, Science

4.8 • 4.1K Ratings

🗓️ 7 December 2024

⏱️ 31 minutes

🔗️ Recording | iTunes | RSS

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Summary

Fruit-powered batteries are the ultimate school science experiment, but they’re normally used to power a pocket calculator. This week’s listener wants to know if they could do more, and sends the team on a quest to discover whether they could used to send a rocket into space?

Professor Saiful Islam is the Guinness World Record holder for the highest voltage from a fruit-based battery, but disappoints the team when he reveals they produce very little power. He used 3,000 of them and only managed a measly 2 Watts. Given that spaceships are famously difficult to get off the ground, it seems a lemon battery might just fail the acid test.

Author Randall Munroe is undeterred and suggests alternative ways to get energy from citrus, including burying them to make oil. Then the team discuss the pros and cons of switching to a lemon-based diet.

For battery expert Paul Shearing, all this raises a serious question, about how we will power the planes of the future. He suggests solar power could play a part in short-haul flights and discusses some of the exciting battery materials being tested today.

Contributors:

Randall Munroe, author Professor Paul Shearing, Oxford University Professor Saiful Islam, Oxford University

Producer: Marijke Peters Executive Producer: Alexandra Feachem A BBC Studios Audio Production

Transcript

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0:00.0	You're about to listen to a BBC podcast, but this is about something else you might enjoy.
0:05.4	My name's Katie Lecky and I'm an assistant commissioner for on demand music on BBC Sounds.
0:10.8	The BBC has an incredible musical heritage and culture and as a music lover, I love being part of that.
0:17.5	With music on sounds, we offer collections and mixes for everything, from workouts to
0:22.4	helping you nod off, boogie in your kitchen, or even just a moment of calm. And they're all put
0:28.3	together by people who know their stuff. So if you want some expertly curated music in your life,
0:35.0	check out BBC Sounds.
0:41.3	BBC Sounds, music, radio, podcasts.
0:45.7	I'm Hannah Frye.
0:46.9	And I'm Dara O'Brien.
0:48.5	And this is Curious Cases.
0:50.6	The show will we take your quirkiest questions?
0:52.1	Your crunchiest conundrums.
0:53.0	And then we solve them.
0:54.5	With the power of science.
0:55.6	I mean, do we always solve them?
0:57.5	I mean, the hit rate's pretty low.
0:59.3	But it is with science. It is with science.
1:03.9	We are joined today in the Curious Casas Studio,
1:06.6	not only by me and Dar O'Brien,
1:08.5	whose drink you can hear clanking in the background,
1:10.5	but also by two pieces of fruit.
	...

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