The Three Branches of US Government. Issues. The United States has three branches of government: the executive, the legislative and the judicial. Each of these branches has a distinct and essential role in the function of the government, and they were established in Articles 1 (legislative), 2 (executive) and 3 (judicial) of the U.S. Constitution.
By 2005 the aluminium can weighed about 14.7 grams. Cans are getting lighter all the time. Today, aluminium cans are about 30% lighter than they were 25 years ago. Thinner, stronger sections are now being used with less metal, less energy and more savings in weight.
On the other hand, if your gas consumption is sometimes the limiting factor on your bottom time, you might choose a larger tank like the high-pressure steel 100 (HP100). The aluminum 100 is the largest aluminum tank available, but at a weight of 40 pounds, is considered quite heavy. The HP100 is the same weight as aluminum AL80, but has a service pressure of 3442 psi. The HP100 is the most popular steel tank choosen by sport divers.