3,846 pounds (SI Units)
Depends on the size.
40g
That depends on the size of the key and what it is made of.
It can cost as much as about 300 dollars to re-key the average car. This varies depending on the type of ignition and the type of key.
3 grams
Density is a characteristic property of a substance.The density of a substance is the relationship between the mass of the substance and how much space it takes up (volume).
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A medieval key would typically weigh around 2-4 ounces, depending on the size and material used. Keys during this time were often made of iron or bronze.
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The amount that a Lexus dealership charges to make an additional key for a Lexus car depends on the year and model of the car.