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2. Card stock - Wikipedia

   en.wikipedia.org/wiki/Card_stock

   Most nations describe paper in terms of grammage—the weight in grams of one sheet of the paper measuring one square meter.. Other people, especially in the United States, describe paper in terms of pound weight—the weight in pounds per ream (500 sheets) of the paper with a given area (based on historical production sizes before trimming): for card stock, this is 20 by 26 in (508 by 660 mm ...

3. Grammage - Wikipedia

   en.wikipedia.org/wiki/Grammage

   Grammage and basis weight, in the pulp and paper industry, are the area density of a paper product, that is, its mass per unit of area. Two ways of expressing grammage are commonly used: Expressed in grams (g) per square metre (g/m 2 ), regardless of its thickness ( caliper ). [1] This is the measure used in most parts of the world.

4. Mass versus weight - Wikipedia

   en.wikipedia.org/wiki/Mass_versus_weight

   The mass of an object is a measure of the object’s inertial property, or the amount of matter it contains. The weight of an object is a measure of the force exerted on the object by gravity, or the force needed to support it. The pull of gravity on the earth gives an object a downward acceleration of about 9.8 m/s 2.

5. Paperboard - Wikipedia

   en.wikipedia.org/wiki/Paperboard

   Paperboard is a thick paper -based material. While there is no rigid differentiation between paper and paperboard, paperboard is generally thicker (usually over 0.30 mm, 0.012 in, or 12 points) than paper and has certain superior attributes such as foldability and rigidity. According to ISO standards, paperboard is a paper with a grammage above ...

6. Amazon is responsible for hazardous items sold by third-party ...

   www.aol.com/news/amazon-responsible-hazardous...

   July 30, 2024 at 1:55 PM. Amazon is responsible under federal safety law for hazardous products sold on its platform by third-party sellers and shipped by the company, a U.S. government agency ...

7. 21 grams experiment - Wikipedia

   en.wikipedia.org/wiki/21_grams_experiment

   21 grams experiment. The 21 grams experiment refers to a study published in 1907 by Duncan MacDougall, a physician from Haverhill, Massachusetts. MacDougall hypothesized that souls have physical weight, and attempted to measure the mass lost by a human when the soul departed the body. MacDougall attempted to measure the mass change of six ...