alt Hacker NewsWarm objects actually do weigh more than their counterfactual cold versions haha. The stress energy tensor is the quantity to look at here.
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neuroelectron • 06/16/2025
I didn't know this, thanks for sharing.
https://herebeanswers.com/things-weigh-heavier-or-lighter-wh...
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Relevant paper: https://iopscience.iop.org/article/10.1088/0143-0807/8/2/006...
Abstract: "According to the weak form of the equivalence principle all objects fall at the same rate in a gravitational field. However, recent calculations in finite-temperature quantum field theory have revealed that at T>0 heavier and/or colder objects actually fall faster than their lighter and/or warmer counterparts. This unexpected result is demonstrated using elementary quantum mechanical arguments."
Downloadable here: https://www.academia.edu/download/109363694/download.pdf