Commons:Valued image candidates/SnowMeltingOnPavingStones.jpg

SnowMeltingOnPavingStones.jpg

promoted

Image
Nominated by	Martinvl (talk) on 2018-03-20 13:01 (UTC)
Scope	Nominated as the most valued image on Commons within the scope: Effect of different materials on Heat conduction
Used in	Global usage af:Warmtegeleiding de:Wärmeleitung es:Conducción de calor it:Conducibilità termica nl:Thermische geleidbaarheid pt:Condução térmica
Reason	On four of the articles listed above, this image is the lede image as it shows the effects of heat conductivity in a way that a lay person can understand it. -- Martinvl (talk)
Review (criteria)	Comment, how confident are we that the file description and scope are correct here? Could it be that this image is not showing the effect of the earth's heat being conducted through the concrete, but the effect of the heat retention properties or the chemical composition of the concrete? -- DeFacto (talk). 18:54, 20 March 2018 (UTC) @DeFacto: We can discount your suggestion of the chemical composition of the concrete. If the chemical composition of the concrete was of importance, it would react every time that there was rain or snow and I know for a fact that those stones have been there for at least 24 years and have shown no signs of any chemical "corrosion". That leaves the suggestion that residual heat in the concrete could have been responsible. The best "proof" that I had was when I was walking the dog this afternoon. The pavements were virtually clear apart from a short stretch that went over a culvert that carried a stream. That section of pavement had ice on it. I attribute the ice to the fact that there was a hollow under the bridge which prevented the earth's heat from being conducted to the pavement. Finally, I did a few calculations which convinced me that there was not enough residual heat to melt the ice. You can do them yourself - the information that you need is at Latent heat, Thermal conduction and Heat capacity. Martinvl (talk) 20:26, 20 March 2018 (UTC)  Support. I suppose this is one of the best examples of heat conduction easily understood by the common man. Voltmetro 11:00, 22 March 2018 (UTC) Result: 1 support, 0 oppose => promoted. -- DeFacto (talk). 17:21, 24 March 2018 (UTC)