title: jQuery object are immutable?
body: <p>Hello a new noob on jQuery here and I was wondering if jQuery objects are immutable. 
  For example:</p>
  
  <pre><code>var obj1 = $("&lt;tag&gt;&lt;/tag&gt;");
  var obj2 = obj1.append("something");
  </code></pre>
  
  <p>Will obj1 and obj2 be the same meaning obj2 will reference obj1? </p>
  
  <p>UPDATE:</p>
  
  <p>The above example kind of scratches the surface of what i want to know, a more accurate question is : If i chain function from the jQuery api will they return the same object or a new one (as the case with strings in Java)?</p>