Grams in kilograms series#

Gravity on earth gives a body a downward acceleration of about 9.8 m/s 2. The weight of a body is a measure of the force exerted on it by gravity or the force needed to support it. The mass of a body is a measure of its inertial property or how much matter it contains. The kilogram is a cylinder of special metal about 39 millimeters wide by 39 millimeters tall that serves as the world's mass standard.įAQ - What is the difference between the terms 'mass' and 'weight'? With his immensely strong arms, Monsieur Kilogram is the master of mass.

Grams in kilograms series#

This comic book-style video animation series has been developed to help middle school students learn about the 7 SI base measurement units.

League of SI Superheroes - Monsieur Kilogram Names and symbols for decimal multiples and submultiples of the unit of mass are formed by attaching prefix names to the unit name 'gram,' and prefix symbols to the unit symbol 'g.' Learn more about this historical quirk. Learn more about the history and current definition of the kilogram.Īmong the SI base units, the kilogram (kg) is the only one whose name and symbol, for historical reasons, include a prefix. Each country that subscribed to the International Metric Convention was assigned one or more copies of the international standards these are known as National Prototype Meters and Kilograms. It was replaced after the International Metric Convention in 1875 by the International Prototype Kilogram which became the unit of mass without reference to the mass of a cubic decimeter of water or to the Kilogram of the Archives. The kilogram, originally defined as the mass of one cubic decimeter of water at the temperature of maximum density, was known as the Kilogram of the Archives. The primary standard of mass for this country is United States Prototype Kilogram 20, which is a platinum-iridium cylinder kept at NIST. The kilogram (kg) is defined by taking the fixed numerical value of the Planck constant h to be 6.62607015 ×10 −34 when expressed in the unit J s, which is equal to kg m 2 s −1, where the meter and the second are defined in terms of c and ∆ν Cs. The National Conference on Weights and Measures (NCWM).Weights & Measures Resources Expand or Collapse.Electric Vehicle Fueling and Submetering.National Working Groups Expand or Collapse Resources for Continuing Education and Training.Legal Metrology Devices Expand or Collapse.Laws and Regulations Expand or Collapse.Laboratory Metrology Expand or Collapse.

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