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From: Thomas Heger <ttt_heg@web.de>
Newsgroups: sci.physics.relativity
Subject: Re: What composes the mass of an electron?
Date: Sun, 3 Nov 2024 06:58:58 +0100
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Am Freitag000001, 01.11.2024 um 22:13 schrieb kinak:
> rhertz wrote:
>> A definition of mass, as found in Google:
>>
>> "Mass is a measurement of the amount of matter or substance in an
>> object.
>> It's the total amount of protons, neutrons, and electrons in an object."
> 
> --------------------------------
> 
> More or less as per my school books of seventy yeass ago.

The definition from above is wrong, because mass is NOT a measure for 
the number of protons or similar.

Mass is a measure for resistance to acceleration.

The 'amount of matter' is not measured in kg but in mol.

TH