{"id":7232,"date":"2015-03-04T23:12:56","date_gmt":"2015-03-04T22:12:56","guid":{"rendered":"http:\/\/testumgebung.eureka-konzepte.de\/en\/why-the-thing-floats\/"},"modified":"2016-08-30T09:55:18","modified_gmt":"2016-08-30T07:55:18","slug":"why-the-thing-floats","status":"publish","type":"post","link":"https:\/\/www.secumar.com\/en\/why-the-thing-floats\/","title":{"rendered":"Why the thing floats!"},"content":{"rendered":"

Why does a ship not sink \u2013 even if it\u2019s heavy and made of steel? How do elephants swim and even concrete can be made to float?
\n
\nThese questions are always being asked, yet it\u2019s nothing to do with magic, more about the laws of physics and nature.<\/p>\n

Whether it floats or not is less to do with its weight as measured in air on land, just as an aircraft carrier is heavy, its weight alone does not signify if it will float or sink.<\/p>\n

It\u2019s different in water. Its buoyancy is dependent upon its density \u2013 that is the relationship between its weight and volume. If the total density of the object is less than water, it will float \u2013 just as will a large concrete barge because it holds enough air that the total density is less than water.<\/p>\n

The ancient Greek philosopher and scientist Archimedes looked at it another way: In his famous Principle he states: \u201cAny object, wholly or partially immersed in a fluid, is buoyed up by a force equal to the weight of the fluid displaced by the object.\u201d That means if an object displaces more than its weight in water, it will float.<\/p>\n

When applied to lifejacket construction, it means of course that you don\u2019t need to create enough buoyancy to float the entire body, but just to keep the head at the correct distance and attitude above the surface to breathe properly.<\/p>\n

See how the cartoonist W. Hartung describes it with his character, the old seadog Willi Secumaat…<\/p>\n

\"Prologue\"<\/a>

Prologue<\/p><\/div>\n

\"1.<\/a>

1. Built and conditioned for swimming\u2019s art
Is hero, Willi Secumaat<\/p><\/div>\n

\"2.<\/a>

2. Here he is in undressed state,
We can measure Willi\u2019s weight<\/p><\/div>\n

\n
\"3.<\/a>

3. If we drop him in the Drink
We can see he does not sink<\/p><\/div>\n

\"4.<\/a>

4. However so he should not expire
A little buoyancy we still require<\/p><\/div>\n

\"5.<\/a>

5. Now togged up with boots and jacket,
You\u2019ll see he now weighs quite a packet,<\/p><\/div>\n

\n
\"6.<\/a>

6. But as his kits holds lots of air
He floats quite well with some to spare<\/p><\/div>\n

\"7.<\/a>

7. And then from the clothing the air is purged
He\u2019s still afloat but slightly submerged!<\/p><\/div>\n

\"8.<\/a>

8. Now we\u2019ve lifted him out of the water
And see he weighs much more than he ought\u2019a!<\/p><\/div>\n

\n
\"9.<\/a>

9. So here\u2019s Willi, in the swim
Strong and smiling, see him grin<\/p><\/div>\n

\"10.<\/a>

10. But once he\u2019s tired and loses his strength
He soon slips under over a length.<\/p><\/div>\n

\"11.<\/a>

11. So there he lies not quite dead,
But all tipped forward by the weight of his head<\/p><\/div>\n

\n
\"12.<\/a>

12. There is however a collar he can use
To support his head, should he choose,<\/p><\/div>\n

\"13.<\/a>

13. A floating lifebelt will however
Support him in a way that\u2019s not too clever.<\/p><\/div>\n

\"14.<\/a>

14. A skinny front and heavy collar
The head goes forward and the body will follow<\/p><\/div>\n

\n
\"15.<\/a>

15. And even if unconscious he should lie
On his back with neck support, held high.<\/p><\/div>\n

\"16.<\/a>

16. And now with SECUMAR safety kit,
Willi\u2019s togged up and really fit.<\/p><\/div>\n

\"Epilogue\"<\/a>

Epilogue<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"

Why does a ship not sink \u2013 even if it\u2019s heavy and made of steel? How do elephants swim and even concrete can be made to float?<\/p>\n","protected":false},"author":5,"featured_media":20579,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_searchwp_excluded":"","editor_plus_copied_stylings":"{}","footnotes":"","_links_to":"","_links_to_target":""},"categories":[1635],"tags":[],"class_list":["post-7232","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-willi-secumaat-en"],"acf":[],"yoast_head":"\nWhy the thing floats! - SECUMAR<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.secumar.com\/en\/why-the-thing-floats\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Why the thing floats! - SECUMAR\" \/>\n<meta property=\"og:description\" content=\"Why does a ship not sink \u2013 even if it\u2019s heavy and made of steel? 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