Real Physics, not 9/11 "Truther Physics"

Some “truthers” claim it’s impossible to move more with less.  This is false.

When I was in late Jr. high, early high school, my dad gave me a BB gun, and I would often use aluminum soda cans as a target- numerous soda cans fell victim to the BB gun. The fact of the matter is if that tiny little BB pellet hit the aluminum can just right, the aluminum can would go flying, and a BB pellet is less massive than an aluminum can, as seen from the following:

Airgun Glossary of Terms

A steel BB’s weighs 0.35g (0.0007 lbs), while a lead BB weighs about 0.52g (0.001144 lbs), as you can see here.

The volume of a 12 oz (remember, these are FLUID ounces which are NOT the same as the ounces used for weight) aluminum soda can is about 355 cubic centimeters Any chemistry book will tell you that one cubic centimeter is equal to one milliliter. If you don’t believe me, go to Science Made Simple, put 1.00 where it says “for the number, in the box marked “from” select cubic centimeters, and in the box marked “to,” put milliliters, select the number of decimal places you want in the answer and click “convert now” and you’ll get this answer: Result of your conversion: 1.0 cubic centimeters or cc is equal to 1.00 milliliters or ml. Therefore, 355 cubic centimeters is equal to 355 milliliters.

We know the volume of the aluminum can and look up the density here.

The density of aluminum is 2.70 grams/ cubic centimeter, and as stated previously, 1 cubic centimeter = 1 milliliter, so density of aluminum can also be written as 2.70 g/mL. Any physics book will tell you that density is equal to mass divided by volume, written as d = m/v. We already know the density and volume of the can, so we merely need to find the mass. If we multiply both sides of the equation by volume ( this is BASIC algebra) we find that the mass = density times volume ( m = dv), so the mass of the aluminum can would be 2.70 grams/milliliter times 355 milliliters, and the milliliters cancel out, leaving us with grams for a total of 958.5 grams ( 2.11 lbs).

Clearly if a BB pellet, which weighs much LESS than an aluminum can ( both steel and lead BB’s weigh much LESS than a pound, the aluminum can is slightly more than 2 pounds) is able to send an aluminum can flying, then it is indeed possible to move more with less. The truth is that, given sufficient velocity, a small, light object CAN move a large, heavy one.

Now see: Yet More Real World Physics, not “Truther” Physics


Posted January 24, 2008 by Victor Chabala in Real 9/11 Facts

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