Submarines - Information, videos and questions for learners by anneke

hive-122108 · @anneke · Mar 17 '20

$2.21

Submarines - Information, videos and questions for learners

<html>
<h3>What boat can go under water??</h3>
<p>https://www.youtube.com/watch?v=GNeidjOSt3s</p>
<p><a href="https://www.youtube.com/watch?v=GNeidjOSt3s">source</a></p>
<p>The submarine has a huge crew to check that everything is running smoothly.  In a big submarine, there can even be more than  100 men or women that is part of the crew.</p>
<blockquote>Submarines are used by the military as part of navy forces, protecting aircraft carriers, performing reconnaissance and carrying out other tasks. </blockquote>
<p>Sometimes people even use submarines to do research under the sea or to find wrecks of old ships.  The submarine can stay under water for months at a time.  The main reason why it will surface is to change crew or to restock the food and supplies for the crew.</p>
<p>A submarine has raised part and here you will find the telescope through which the crew can have a look to see what is going on above the water.  You will also find the radar here.  In order for a submarine to go under water, the ballast tanks will be filled with water.</p>
<p>In the 1600&#x27;s people developed &#x27;submersibles&#x27; - these were almost like a submarine, but the min difference was it could not stay under water for a long time by itself without a pipe that let in oxygen.   It can also not generate its own power.  Only in 1776 the first submarine was invented.</p>
<blockquote>The term <strong>submersible</strong> is often used to <strong>differentiate </strong>from other underwater vehicles known as <strong>submarines</strong>, in that a <strong>submarine</strong> is a fully autonomous craft, capable of renewing its own power and breathing air, whereas a <strong>submersible</strong> is usually supported by a surface vessel </blockquote>
<p>https://www.youtube.com/watch?v=BikIK4AY8oc</p>
<p><a href="https://www.youtube.com/watch?v=BikIK4AY8oc">source</a></p>
<blockquote>The first submarine not propelled by human power was the French vessel named ‘Plongeur’. Launched in 1863, it used compressed air for propulsion. </blockquote>
<p>In the 1800&#x27;s they started adding torpedoes to the submarine that could be used in warfare.</p>
<p>Jules Verne wrote a book in 1870  called &#x27;20 000 Leagues under the sea&#x27;.  This was a science fiction story, but it made a lot of people aware of what submarines could do and more people became interested in this.</p>
<p>Submarines were used during both world wars and the Germans were very successful with blocking the supply lines to the UK with their submarines which they called &#x27;U-boats&#x27;.</p>
<p>The first nuclear powered submarine was launched in 1954 and this meant that not only did the submarine move faster, it also had a much longer life expectancy before its power ran out.</p>
<p>https://www.youtube.com/watch?v=g1RTcJivvpQ</p>
<p><a href="https://www.youtube.com/watch?v=g1RTcJivvpQ">source</a></p>
<ol><li>What is a submarine?</li><li>How does it go down under the sea?</li><li>What is the function of the rudder and the propeller?</li><li>What do they use the periscope for?</li><li>What is a &#x27;sonar&#x27;?</li><li>Can you explain what is a submersible and what it is used for?</li></ol>
<p>https://imgoat.com/uploads/3db85ed909/85710.gif</p>
<p>http://i.imgur.com/a0vQdRk.png
</p>
<p>Team South Africa banner designed by @bearone
</p>
<p>                       https://imgoat.com/uploads/3db85ed909/85708.png
</p>
<p>https://steemitimages.com/640x0/https://media.discordapp.net/attachments/636539314402230272/636539524461101066/STEEMSA_logo.png?width=300&amp;height=300</p>
</html>

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