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In the Nanga Parbat there is a high altitude gap/saddle called "Bazhin Gap". What does "Bazhin" refer to? Local dialect? A name of a person? The expression seems to be mentioned for the first time in the 1930ies. Any lead is appreciated. GEEZER nil nisi bene 10:18, 21 April 2014 (UTC)
I had some leftovers that I was going to save in the fridge, but my mom says don't do that since they are still warm. I'm supposed to leave them on the counter til they reach room temperature before refrigerating. She says the same thing when we buy warm stuff from the store. What's the issue here? Does the quicker temperature change mess up the food in some way? Does putting the warm stuff (just an unfinished meal, not anything large) in the fridge temporarily warm up the fridge interior enough to speed the spoilage of other food in the fridge? Or is the whole thing just silly? Thanks. 98.207.66.10 ( talk) 19:33, 21 April 2014 (UTC)
Thanks, I see. At least this identifies the issue, of warm food in the fridge transferring heat to other food. Of course letting the warm food sit outside the fridge probably attracts even more bacteria, but whatever. 98.207.66.10 ( talk) 01:09, 22 April 2014 (UTC)
Actually, newer model fridges may not be as good in dealing with this problem than older models. The newer models are a lot more energy efficient due to better insulation, but that means that the fridge doesn't run its engine as often as the older models. If you place a hot object in such a newer model fridge then the temperature in the neighborhood of the hot object will rise a lot more before the engine will run. If the engine only runs once every hour, then the heat from the hot object would have had to trigger the thermostat to run the engine, but that means that the stuff in the direct neighborhood of the object will have been heated well above the ideal temperature. In contrast, if you have an inefficient fridge that runs its engine every five minutes, then the heat from the object is irrelevant. There is then a large heat flux from the environment moving into the fridge that is almost constantly being pumped out.
What I do is I place hot objects in the freezing compartment of the fridge for about 15 minutes to cool them down to about 5 C (the time depends on the size of the object). The thermostat of the fridge reacts immediately to anything placed there and it's also well isolated from other stuff in the fridge (I don't use the freezing compartment of the fridge for storage at all). Count Iblis ( talk) 17:20, 24 April 2014 (UTC)
I have read the article on hypoxia, but it did not answer my questions. What are the cumulative effects of marginal hypoxia? What would the main symptoms be? Thank you. — Preceding unsigned comment added by 62.56.71.197 ( talk) 21:45, 21 April 2014 (UTC)
Steel gasoline (UK: petrol) tanks of cars and motorcycles that have internal rust are difficult to clean, access is only via by small openings and most of the inner surface is out of sight. Vinegar which is mainly dilute Acetic acid is suggested in online videos as a rust remover so I experimented by letting the head of a rusty screw soak overnight in a teaspoonful of concentrated "Vinegar Essence 35%" which is cheap (and is probably safer than an industrial chemical such as phosphoric acid). The pictures show my results which are promising. The questions are:
Science desk | ||
---|---|---|
< April 20 | << Mar | April | May >> | April 22 > |
Welcome to the Wikipedia Science Reference Desk Archives |
---|
The page you are currently viewing is an archive page. While you can leave answers for any questions shown below, please ask new questions on one of the current reference desk pages. |
In the Nanga Parbat there is a high altitude gap/saddle called "Bazhin Gap". What does "Bazhin" refer to? Local dialect? A name of a person? The expression seems to be mentioned for the first time in the 1930ies. Any lead is appreciated. GEEZER nil nisi bene 10:18, 21 April 2014 (UTC)
I had some leftovers that I was going to save in the fridge, but my mom says don't do that since they are still warm. I'm supposed to leave them on the counter til they reach room temperature before refrigerating. She says the same thing when we buy warm stuff from the store. What's the issue here? Does the quicker temperature change mess up the food in some way? Does putting the warm stuff (just an unfinished meal, not anything large) in the fridge temporarily warm up the fridge interior enough to speed the spoilage of other food in the fridge? Or is the whole thing just silly? Thanks. 98.207.66.10 ( talk) 19:33, 21 April 2014 (UTC)
Thanks, I see. At least this identifies the issue, of warm food in the fridge transferring heat to other food. Of course letting the warm food sit outside the fridge probably attracts even more bacteria, but whatever. 98.207.66.10 ( talk) 01:09, 22 April 2014 (UTC)
Actually, newer model fridges may not be as good in dealing with this problem than older models. The newer models are a lot more energy efficient due to better insulation, but that means that the fridge doesn't run its engine as often as the older models. If you place a hot object in such a newer model fridge then the temperature in the neighborhood of the hot object will rise a lot more before the engine will run. If the engine only runs once every hour, then the heat from the hot object would have had to trigger the thermostat to run the engine, but that means that the stuff in the direct neighborhood of the object will have been heated well above the ideal temperature. In contrast, if you have an inefficient fridge that runs its engine every five minutes, then the heat from the object is irrelevant. There is then a large heat flux from the environment moving into the fridge that is almost constantly being pumped out.
What I do is I place hot objects in the freezing compartment of the fridge for about 15 minutes to cool them down to about 5 C (the time depends on the size of the object). The thermostat of the fridge reacts immediately to anything placed there and it's also well isolated from other stuff in the fridge (I don't use the freezing compartment of the fridge for storage at all). Count Iblis ( talk) 17:20, 24 April 2014 (UTC)
I have read the article on hypoxia, but it did not answer my questions. What are the cumulative effects of marginal hypoxia? What would the main symptoms be? Thank you. — Preceding unsigned comment added by 62.56.71.197 ( talk) 21:45, 21 April 2014 (UTC)
Steel gasoline (UK: petrol) tanks of cars and motorcycles that have internal rust are difficult to clean, access is only via by small openings and most of the inner surface is out of sight. Vinegar which is mainly dilute Acetic acid is suggested in online videos as a rust remover so I experimented by letting the head of a rusty screw soak overnight in a teaspoonful of concentrated "Vinegar Essence 35%" which is cheap (and is probably safer than an industrial chemical such as phosphoric acid). The pictures show my results which are promising. The questions are: