{"product_id":"what-weighs-more-massimiliano-sassoli-de-bianchi-9781445299570","title":"What weighs more: 1 kg of iron or 1 kg of feathers?","description":"Once, when I was still a child, my father asked me: \"Which weighs more: 1 kilo of iron or 1 kilo of feathers?\" I remember that sure of myself I answered him quickly: \"Surely 1 kilo of iron weighs more, dad, because metal things, like the armor of medieval knights, are very heavy, while the feathers that decorate birds' wings are very light\". I can't tell you how disappointed I was when I heard him say: \"No my son, that's wrong: they weigh the same, because 1 kilo is always 1 kilo!\" Maybe because of the evening trick questions from my dad, when I grew up I decided to become a physicist, and to my big surprise I discovered that I was right when I was a child. Indeed: On the Earth, even if only by a little, 1 kilo of iron weighs more than 1 kilo of feathers! Don't worry, the sawdust that I have in my head has not caught on fire! But I hope that I have made you curious and that now you will want to come hunting with me for this strange and heavy mistake.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eAuthor:\u003c\/b\u003e Massimiliano Sassoli de Bianchi\u003cbr\u003e\u003cb\u003eISBN-10:\u003c\/b\u003e 1445299577\u003cbr\u003e\u003cb\u003eISBN-13:\u003c\/b\u003e 9781445299570\u003cbr\u003e\u003cb\u003ePublisher:\u003c\/b\u003e Lulu.com\u003cbr\u003e\u003cb\u003eLanguage:\u003c\/b\u003e English\u003cbr\u003e\u003cb\u003ePublished:\u003c\/b\u003e 10\/24\/2009\u003cbr\u003e\u003cb\u003ePages:\u003c\/b\u003e 164\u003cbr\u003e\u003cb\u003eFormat:\u003c\/b\u003e Paperback\u003cbr\u003e\u003cb\u003eWeight:\u003c\/b\u003e 0.27lbs\u003cbr\u003e\u003cb\u003eSize:\u003c\/b\u003e 7.00h x 4.25w x 0.35d","brand":"Massimiliano Sassoli de Bianchi","offers":[{"title":"Paperback","offer_id":47305244115199,"sku":"9781445299570","price":15.12,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0662\/2982\/9887\/files\/img_b9520a55-3586-4184-9db3-5679f7cd0d5c.jpg?v=1758830352","url":"https:\/\/www.whiterainbookhouse.com\/products\/what-weighs-more-massimiliano-sassoli-de-bianchi-9781445299570","provider":"WR Book House","version":"1.0","type":"link"}