Southerly by David Haywood

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Southerly: Energy Special, Part 1: What is Energy, Anyway?

15 Responses

  • David Haywood,

    From the PA Radio discussion thread...

    Emma Hart wrote:

    I may be shallow, and I am, but I really wanted visuals for this.

    Well, I can't help but agree that it would make life a lot easier. Science/engineering is totally visual for me, so it really gives me gyp to try and do it on the radio.

    However, bonus visuals are actually available in the transcript.

    Andrew Feltoe wrote:

    David this is brilliant -- I was reliving my high school physics classes through your podcast. Keep it up and well done.

    Dude, if it was anything like my high school physics class -- then my sincere apologies!

    ... although it does give me an idea for my next programme: "Can anyone remember the definition of energy? Anyone? Anyone? Anyone? Anyone? Anyone? Anyone?", etc.

    But very glad if it all made sense...

    Dunsandel • Since Nov 2006 • 1156 posts Report Reply

  • Deborah,

    E = mc squared (no superscript available) where m = mass and c = the speed of light.

    And I didn't even do high school physics.

    Proud to be a Nerd!

    New Lynn • Since Nov 2006 • 1447 posts Report Reply

  • Paul Williams,

    Hmm, isn't that the formula for the relationship between kinetic energy and mass etc - a mechanism for measurement rather than a definition? A definition of energy would depend on the kind of energy, kinetic, chemical, gravitational etc and would describe the effects of energy...

    Sydney • Since Nov 2006 • 2273 posts Report Reply

  • David Haywood,

    E=mc^2

    It's the equation that tells you how much you get if mass is converted into energy (or vice versa). I seem to remember that the mass of the original atomic bomb was one gram less following explosion (i.e. if you gathered together all the bits of exploded bomb and weighed it) -- that gram of mass having been converted into energy.

    In other words, you get a very large amount of energy from a very small amount of mass.

    [But, actually, I was (jocularly) referring to the definition of energy given in my programme. In which case, you guys fail my listening comprehension test (just kidding).]

    Dunsandel • Since Nov 2006 • 1156 posts Report Reply

  • Paul Williams,

    Sorry David, got distracted by trying to be a know-it-all (and failed)!

    BTW, if anyone wants an easy intro to the theory and a very entertaining read, David Bodanis's E=MC2 is a fantastic book. It is the "biography" of the the theory of relatively that explains the current understanding of each element of the equation through an overview of its historical development.

    Sydney • Since Nov 2006 • 2273 posts Report Reply

  • Deborah,

    I did read your transcript, but only after I posted my reply.

    I guess I fail the test. I'm going to attribute that to my mind being addled by eclipse watching.

    New Lynn • Since Nov 2006 • 1447 posts Report Reply

  • David Haywood,

    Deborah wrote:

    I'm going to attribute that to my mind being addled by eclipse watching.

    Fair enough, dude! My mind was so addled by a screaming baby (so loud that even hardened Plunket nurses cover their ears and go: "Oh my God, that's loud") that, alas, I didn't even manage the eclipse.

    By the way, did anyone see the 'Campbell Live' piece on the lunar eclipse -- where the journalist interviewed an astrologer. I believe this is the worst piece of television journalism I have ever seen. It makes me think that death penalty advocates might actually have a point (in the case of TV3 journalists, at any rate).

    Dunsandel • Since Nov 2006 • 1156 posts Report Reply

  • InternationalObserver,

    yeah, I'm a long time 3 News watcher, but lately ... WTF?

    Since Jun 2007 • 909 posts Report Reply

  • Don Christie,

    [Sound of thunderstorm]

    "Thunder. Enter the three Witches".

    Not saying I was disappointed with the rest of the transcipt, just that my expectations had been heightened somewhat.

    Wellington • Since Nov 2006 • 1645 posts Report Reply

  • Jeremy Andrew,

    By the way, did anyone see the 'Campbell Live' piece on the lunar eclipse -- where the journalist interviewed an astrologer.

    No one ever went broke underestimating the intelligence of the viewing public - to paraphrase Henry Mencken.

    Hamiltron - City of the F… • Since Nov 2006 • 900 posts Report Reply

  • Bart Janssen,

    So how much energy was consumed getting David to Auckland to climb the sky tower? Always presuming he actually did climb that tower?

    And as a matter of curiosity and in the interest of encouraging home science experiments

    How much energy does a screaming baby use?

    ooo and is there a way of capturing that energy? Visions of the looming energy crises solved....

    cheers
    Bart

    Auckland • Since Nov 2006 • 4461 posts Report Reply

  • merc,

    Speaking of TV3, Samantha looks like she has the right stuff for journalism these days,
    http://www.nzherald.co.nz/section/1/story.cfm?c_id=1&objectid=10460522
    I wonder if John's promo shot will feature him in his undies next?

    Since Dec 2006 • 2471 posts Report Reply

  • Emma Hart,

    I wonder if John's promo shot will feature him in his undies next?

    Assuming you mean John Campbell, we can hope. I know some women who have some serious mind-pron issues with that suit.

    Science/engineering is totally visual for me, so it really gives me gyp to try and do it on the radio.

    Honestly, I just wanted to see how knackered you really were.

    Christchurch • Since Nov 2006 • 4651 posts Report Reply

  • David Haywood,

    Bart Janssen wrote:

    Always presuming he actually did climb that tower?

    Bart, I believe you would be termed a radio-presenter-climbs-Skytower denier. It was (ahem) over a year ago, so the first sentence was added in afterwards, but I did it all right (and with measurements -- see graph in transcript).

    I refer you to an extract from my diary of that day...

    I was slightly disconcerted when Sally (the Skytower manager) asked some detailed questions about my medical history. She finished off by saying: "But I suppose you’ve been training for weeks to do this?"

    Me: Um, not exactly... [then to reassure her] but I've climbed stairs before.

    The possibility that I might have underestimated the amount of physical fitness required was underscored by Graham -- the chap who was delegated as my minder for the climb -- who asked if I wanted to do stretching exercises beforehand.

    Graham looked young and extremely fit, and mentioned casually that he spent an hour at the gym every day. I had unhappy visions of him telling his family about how he took some fat guy up the Skytower, who walked at the rate of a sloth, and died of a heart attack half-way up. And they would all have a big laugh about it.

    But, happily, he was a wreck by the end of the climb, and had to go home to recover in bed. And surprisingly –- despite a lifetime of zero physical activity and a pint-a-day habit –- I felt pretty good. So good that I ran up the last three flights of stairs just to see if I could.

    Dunsandel • Since Nov 2006 • 1156 posts Report Reply

  • andrew llewellyn,

    [Sound of thunderstorm]

    I love the way you use props & sound effects...

    By golly I may have to listen to it! But is it anything like the piece I once heard of this guy eating a HUGE bacon sandwich (or two) and then using his new iPOD thingy to measure exactly how long to work the calories off with a run?

    Halfway through "Bleeurgh... I'm throwing up now... "

    Priceless.

    Since Nov 2006 • 2075 posts Report Reply

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