Thermogravimetry and the Negative Temperature Dependence of Gravity

Dmitriev, A. L.

doi:10.5539/apr.v7n6p43

Cited by 4 publications

(3 citation statements)

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“…We may use all obtained mean values to compute a 3σ mean experimental limit of .// < 1.8 × 10 . This rules out the anomalies claimed by Dmitriev [6][7][8] and Liangzao [9] by more than two orders of magnitude.…”

Section: Discussionsupporting

confidence: 72%

“…The initial experiment was improved by Shaw and Davy [5] reporting < 2 × 10 " . Some 80 years later, Dmitriev [6][7][8] re-analyzed the Shaw and Davy experiment by looking for a connection between elastic forces and gravitational acceleration that should lead to a much larger than classically expected mass-temperature relationship. He performed weight experiments with a variety of mostly metallic samples that were heated up by an electrical or chemical heater or even by ultrasonic means.…”

Section: Introductionmentioning

confidence: 99%

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Testing the influence of temperature on mass at high temperatures

Hentsch

Hutsch

2021

Measurement

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Special relativity predicts a very small influence of temperature on mass of around ∆ ≈ 10 . More than 100 years ago, experiments were performed that revealed a limit of <10 -8 for changes of a few degree at room temperature. A similar limit was obtained with a magnetic suspension balance at cryogenic temperatures. Recently, some measurements claim to have seen a negative dependence at the 10 -6 level for a variety of metal samples at room temperature, which would be of interest e.g. to explain variations in the measurement of the gravitational constant. We have performed measurements with an analytical balance in vacuum and with a commercial thermogravimetric balance in argon and obtained a 3σ limit of < 1.8 × 10 for both metallic (Cu, Pt) and non-metallic (Al2O3) samples ranging from room temperature to above 1000°C. This extends previous measurements to the high-temperature regime and rules out all claimed anomalies by more than two orders of magnitude.

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Section: Discussionsupporting

confidence: 72%

Section: Introductionmentioning

confidence: 99%

Testing the influence of temperature on mass at high temperatures

Hentsch

Hutsch

2021

Measurement

View full text Add to dashboard Cite

show abstract

“…Effects of buoyancy, convection, air currents, influence of external electric and magnetic fields (Raizer, 1991) traditionally explain its characteristic shape. Experimentally proven influence of body temperature on its weight (Dmitriev, Nikushchenko, & Snegov, 2003;Dmitriev, 2008;Dmitriev & Bulgakova, 2013;Dmitriev, 2015) gives the grounds to consider a question of extent of impact of a gravitational field of the Earth on a shape of an electric discharge. High temperatures, till tens of thousands K , in the channel of a free electric discharge at low pressure of about 0.1 atm support it.…”

mentioning

confidence: 99%