Commands
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Queries
7.75 ms
Query time
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Failed Queries
| # | Time | Connection | Command |
|---|---|---|---|
| 1 | 0.77 ms | cache | CONNECT redis.internal 6379 5 <null> 5 5 |
| 2 | 0.47 ms | cache | SELECT 0 |
| 3 | 0.32 ms | cache | MGET wJo3GJ9dRH:data > anonymous-media > id=6356,locale=en,domain=www |
| 4 | 2.21 ms | cache | INFO Memory |
| 5 | 0.04 ms | cache | MULTI 2 |
| 6 | 0.14 ms | cache | SETEX wJo3GJ9dRH:data > anonymous-media > id=6356,locale=en,domain=www 2678399 �}�A �_ Oa:2:{i:0;s:13:"cache-service";i:1;s:36:"cache-service-data > anonymous-media";}a:15:{s:2:"id";i:809;s:5:"title";s:21:"Video: Sink or Float?";s:4:"slug";s:19:"video-sink-or-float";s:9:"mediaType";s:5:"video";s:14:"thumbnailSizes";a:3:{s:9:"node_pack";s:157:"https://www.preprod-yousg3q-etbsswybjvlic.fr-3.platformsh.site/media-cache/media_thumbnail_node_pack/uploads/media/thumbnails/809-6545f44da20d5534933868.webp";s:10:"suggestion";s:158:"https://www.preprod-yousg3q-etbsswybjvlic.fr-3.platformsh.site/media-cache/media_thumbnail_suggestion/uploads/media/thumbnails/809-6545f44da20d5534933868.webp";s:5:"title";s:153:"https://www.preprod-yousg3q-etbsswybjvlic.fr-3.platformsh.site/media-cache/media_thumbnail_title/uploads/media/thumbnails/809-6545f44da20d5534933868.webp";}s:19:"thumbnailBackground";s:7:"#f487b9";s:11:"publishedAt";O:17:"DateTimeImmutable":3:{s:4:"date";s:26:"2015-08-05 00:00:00.000000";s:13:"timezone_type";i:3;s:8:"timezone";s:3:"UTC";}s:8:"isExpert";b:0;s:5:"goals";N;s:5:"width";i:550;s:6:"height";i:440;s:11:"description";s:1907:"<p>All objects have a mass.</p> <p>The greater the mass, the greater the weight.</p> <p>Weight is the gravitational force that pulls an object downwards.</p> <p>But if we plunge an object in water, its weight seems less, as if the object had become lighter.</p> <p>In fact, its mass, and therefore its weight remain the same.</p> <p>However, a new force counteracts the weight.</p> <p>This force is called the buoyant force or simply buoyancy. The object experiences the combined action of both forces.</p> <p>If the buoyant force is less than the weight, the object falls, it sinks.</p> <p>Inversely, if the buoyant force is greater than the object’s weight, it goes up.</p> <p>The object floats when these two forces are balanced.</p> <p>In any case, buoyancy is oriented upwards.</p> <p>Would it be possible to increase this force enough to make a heavy object float?</p> <p>The answer is « yes ! »</p> <p>The Greek scholar Archimedes found the solution.</p> <p>“A body immersed in a fluid whether fully or partially immersed, is equal to the weight of the fluid that the body displaces”</p> <p>Let’s consider an example. When an object sinks in water, it displaces water.</p> <p>The volume of water displaced is equal to the immersed volume of the object.</p> <p>The bigger the object, the more water is displaced.</p> <p>Archimedes asserted that the weight of the volume of water displaced is exactly equal to the buoyant force except that this force goes upward.</p> <p>For buoyancy, the shape is as important as the mass</p> <p>A compact mass displaces very little water, whereas a ship, given its shape, displaces a lot of water.</p> <p>The greater the immersed volume, the greater the intensity of the buoyant force.</p> <p>Thus, a light object can sink whereas a very heavy object can float.</p>";s:11:"suggestions";a:6:{i:0;a:9:{s:2:"id";i:441;s:5:"title";s:14:"Sink or float?";s:4:"slug";s:13:"sink-or-float";s:9:"mediaType";s:10:"simulation";s:14:"thumbnailSizes";a:3:{s:9:"node_pack";s:157:"https://www.preprod-yousg3q-etbsswybjvlic.fr-3.platformsh.site/media-cache/media_thumbnail_node_pack/uploads/media/thumbnails/441-6545f3641819d973230049.webp";s:10:"suggestion";s:158:"https://www.preprod-yousg3q-etbsswybjvlic.fr-3.platformsh.site/media-cache/media_thumbnail_suggestion/uploads/media/thumbnails/441-6545f3641819d973230049.webp";s:5:"title";s:153:"https://www.preprod-yousg3q-etbsswybjvlic.fr-3.platformsh.site/media-cache/media_thumbnail_title/uploads/media/thumbnails/441-6545f3641819d973230049.webp";}s:19:"thumbnailBackground";s:7:"#f6951d";s:11:"publishedAt";O:17:"DateTimeImmutable":3:{s:4:"date";s:26:"2015-05-11 00:00:00.000000";s:13:"timezone_type";i:3;s:8:"timezone";s:3:"UTC";}s:8:"isExpert";b:0;s:5:"goals";s:254:"<ul> <li>To classify objects according to whether they sink or float.</li> <li>To introduce the notion of density (middle school).</li> <li>To teach that a floating body displaces a volume of fluid equal in mass to the mass of the body.</li> </ul>";}i:1;a:9:{s:2:"id";i:630;s:5:"title";s:9:"Submarine";s:4:"slug";s:9:"submarine";s:9:"mediaType";s:10:"simulation";s:14:"thumbnailSizes";a:3:{s:9:"node_pack";s:157:"https://www.preprod-yousg3q-etbsswybjvlic.fr-3.platformsh.site/media-cache/media_thumbnail_node_pack/uploads/media/thumbnails/630-6545f3e2752a6430558484.webp";s:10:"suggestion";s:158:"https://www.preprod-yousg3q-etbsswybjvlic.fr-3.platformsh.site/media-cache/media_thumbnail_suggestion/uploads/media/thumbnails/630-6545f3e2752a6430558484.webp";s:5:"title";s:153:"https://www.preprod-yousg3q-etbsswybjvlic.fr-3.platformsh.site/media-cache/media_thumbnail_title/uploads/media/thumbnails/630-6545f3e2752a6430558484.webp";}s:19:"thumbnailBackground";s:7:"#b51d8e";s:11:"publishedAt";O:17:"DateTimeImmutable":3:{s:4:"date";s:26:"2015-05-11 00:00:00.000000";s:13:"timezone_type";i:3;s:8:"timezone";s:3:"UTC";}s:8:"isExpert";b:0;s:5:"goals";s:183:"<ul> <li>To study an application of buoyant force.</li> <li>To apply the fundamental principle of dynamics by studying the effects of a balance or imbalance of forces.</li> </ul>";}i:2;a:9:{s:2:"id";i:970;s:5:"title";s:7:"Iceberg";s:4:"slug";s:7:"iceberg";s:9:"mediaType";s:10:"simulation";s:14:"thumbnailSizes";a:3:{s:9:"node_pack";s:157:"https://www.preprod-yousg3q-etbsswybjvlic.fr-3.platformsh.site/media-cache/media_thumbnail_node_pack/uploads/media/thumbnails/970-6545f49099ef1313326972.webp";s:10:"suggestion";s:158:"https://www.preprod-yousg3q-etbsswybjvlic.fr-3.platformsh.site/media-cache/media_thumbnail_suggestion/uploads/media/thumbnails/970-6545f49099ef1313326972.webp";s:5:"title";s:153:"https://www.preprod-yousg3q-etbsswybjvlic.fr-3.platformsh.site/media-cache/media_thumbnail_title/uploads/media/thumbnails/970-6545f49099ef1313326972.webp";}s:19:"thumbnailBackground";s:7:"#00b7ad";s:11:"publishedAt";O:17:"DateTimeImmutable":3:{s:4:"date";s:26:"2022-02-07 00:00:00.000000";s:13:"timezone_type";i:3;s:8:"timezone";s:3:"UTC";}s:8:"isExpert";b:0;s:5:"goals";s:225:"<ul> <li>To understand why icebergs float.</li> <li>To play with the center of mass of a solid.</li> <li>To introduce the notion of force couple.</li> <li>To define the conditions for a stable equilibrium.</li> </ul>";}i:3;a:9:{s:2:"id";i:822;s:5:"title";s:16:"Video: Submarine";s:4:"slug";s:15:"video-submarine";s:9:"mediaType";s:5:"video";s:14:"thumbnailSizes";a:3:{s:9:"node_pack";s:157:"https://www.preprod-yousg3q-etbsswybjvlic.fr-3.platformsh.site/media-cache/media_thumbnail_node_pack/uploads/media/thumbnails/822-6545f453502dc546521188.webp";s:10:"suggestion";s:158:"https://www.preprod-yousg3q-etbsswybjvlic.fr-3.platformsh.site/media-cache/media_thumbnail_suggestion/uploads/media/thumbnails/822-6545f453502dc546521188.webp";s:5:"title";s:153:"https://www.preprod-yousg3q-etbsswybjvlic.fr-3.platformsh.site/media-cache/media_thumbnail_title/uploads/media/thumbnails/822-6545f453502dc546521188.webp";}s:19:"thumbnailBackground";s:7:"#f6951d";s:11:"publishedAt";O:17:"DateTimeImmutable":3:{s:4:"date";s:26:"2015-08-19 00:00:00.000000";s:13:"timezone_type";i:3;s:8:"timezone";s:3:"UTC";}s:8:"isExpert";b:0;s:5:"goals";N;}i:4;a:9:{s:2:"id";i:973;s:5:"title";s:14:"Container ship";s:4:"slug";s:14:"container-ship";s:9:"mediaType";s:10:"simulation";s:14:"thumbnailSizes";a:3:{s:9:"node_pack";s:157:"https://www.preprod-yousg3q-etbsswybjvlic.fr-3.platformsh.site/media-cache/media_thumbnail_node_pack/uploads/media/thumbnails/973-6545f491a2c73309463696.webp";s:10:"suggestion";s:158:"https://www.preprod-yousg3q-etbsswybjvlic.fr-3.platformsh.site/media-cache/media_thumbnail_suggestion/uploads/media/thumbnails/973-6545f491a2c73309463696.webp";s:5:"title";s:153:"https://www.preprod-yousg3q-etbsswybjvlic.fr-3.platformsh.site/media-cache/media_thumbnail_title/uploads/media/thumbnails/973-6545f491a2c73309463696.webp";}s:19:"thumbnailBackground";s:7:"#f487b9";s:11:"publishedAt";O:17:"DateTimeImmutable":3:{s:4:"date";s:26:"2022-02-07 00:00:00.000000";s:13:"timezone_type";i:3;s:8:"timezone";s:3:"UTC";}s:8:"isExpert";b:0;s:5:"goals";s:223:"<ul> <li>To explore Archimedes' principle by loading up a sinking ship.</li> <li>To define what the volume of water displaced by a floating body is.</li> <li>To address the notion of balance of forces.</li> </ul>";}i:5;a:9:{s:2:"id";i:365;s:5:"title";s:21:"Archimede's principle";s:4:"slug";s:21:"archimede-s-principle";s:9:"mediaType";s:10:"simulation";s:14:"thumbnailSizes";a:3:{s:9:"node_pack";s:157:"https://www.preprod-yousg3q-etbsswybjvlic.fr-3.platformsh.site/media-cache/media_thumbnail_node_pack/uploads/media/thumbnails/365-6545f3378688e751580728.webp";s:10:"suggestion";s:158:"https://www.preprod-yousg3q-etbsswybjvlic.fr-3.platformsh.site/media-cache/media_thumbnail_suggestion/uploads/media/thumbnails/365-6545f3378688e751580728.webp";s:5:"title";s:153:"https://www.preprod-yousg3q-etbsswybjvlic.fr-3.platformsh.site/media-cache/media_thumbnail_title/uploads/media/thumbnails/365-6545f3378688e751580728.webp";}s:19:"thumbnailBackground";s:7:"#00b7ad";s:11:"publishedAt";O:17:"DateTimeImmutable":3:{s:4:"date";s:26:"2015-05-11 00:00:00.000000";s:13:"timezone_type";i:3;s:8:"timezone";s:3:"UTC";}s:8:"isExpert";b:0;s:5:"goals";s:225:"<ul> <li>To understand that buoyant force depends only on the volume of fluid displaced.</li> <li>To illustrate how hot air balloons fly (the hot air inside the balloon is less dense than the surrounding air.)</li> </ul>";}}s:4:"tags";a:10:{i:0;s:9:"archimede";i:1;s:8:"buoyancy";i:2;s:7:"density";i:3;s:11:"equilibrium";i:4;s:5:"float";i:5;s:6:"forces";i:6;s:9:"net force";i:7;s:4:"sink";i:8;s:9:"submarine";i:9;s:6:"weight";}s:12:"baseNodeName";s:7:"Physics";} |
| 7 | 0.05 ms | cache | SADD wJo3GJ9dRH:tagscache-service wJo3GJ9dRH:data > anonymous-media > id=6356,locale=en,domain=www |
| 8 | 0.04 ms | cache | SADD wJo3GJ9dRH:tagscache-service-data > anonymous-media wJo3GJ9dRH:data > anonymous-media > id=6356,locale=en,domain=www |
| 9 | 0.87 ms | cache | EXEC |
| 10 | 2.84 ms | cache | MGET wJo3GJ9dRH:data > locale-page-groups > locale=en |