2,772 reputation
11334
bio website nattinger.net
location Cambridge, MA
age 27
visits member for 2 years, 2 months
seen 1 hour ago

I'm an elected moderator on Science Fiction and Fantasy and moderator pro tempore on The Great Outdoors, and I'm also active on several other SE sites.

profile for Kevin on Stack Exchange, a network of free, community-driven Q&A sites

I am an iOS Software Engineer at Fitbit, Inc.


Mar
1
comment Where can I find help identifying an owl by its call?
For anyone interested, there is a meta discussion going on the topicality of this question.
Feb
21
comment How do I get started duck hunting?
First, you have to find an old NES...
Feb
14
comment Best way to illuminate a tent?
I assume by "torch" you mean what we Americans would call a "flashlight." Our torches would be quite dangerous in a tent.
Feb
13
comment How to tell if water is likely to have cryptosporidium?
I'm not sure enough to post as an answer, but I suspect the only way is if there is a warning about it, usually from some government agency.
Feb
12
comment Which will keep my food colder longer, draining the melted ice water, or leaving it in the cooler?
At meltB, if (as you are saying) there is less heat energy in cooler B, the ice will NOT be all melted unless it was already fully melted in cooler A. It takes the exact same amount of energy to melt the exact same amount of ice, regardless of conditions.
Feb
12
comment Which will keep my food colder longer, draining the melted ice water, or leaving it in the cooler?
E=(3/2)kT, so T=(2/3)(E/k). If k were constant, the temperature would be directly proportional to your (still incorrect) graphs. However, the average k of the drained cooler is dropping, so the temperature is increasing even faster. (Though, as I said, not until the ice is all melted.)
Feb
12
comment Which will keep my food colder longer, draining the melted ice water, or leaving it in the cooler?
Oh, and I should mention, the temperature doesn't increase linearly, they will both be at a constant 32 until all ice is melted (except small jumps for draining the ice in the appropriate cooler), after which the temperature difference will decay exponentially (with the water-filled cooler rising much more slowly).
Feb
12
comment Which will keep my food colder longer, draining the melted ice water, or leaving it in the cooler?
"Both leak heat at the same rate," and "at meltB there is less heat energy in cooler B than in cooler A," but "B's ice will be completely melted before A's ice is." Those can't all be true. In fact, the amount of ice in the cooler depends entirely on how much heat energy there is in the cooler, so by acknowledging that there will be more heat energy in the drained cooler, you are actually saying that the ice in it will melt faster.
Feb
10
comment Which will keep my food colder longer, draining the melted ice water, or leaving it in the cooler?
Also, the fact that the water is still at freezing will inhibit bacteria from growing.
Feb
10
comment Which will keep my food colder longer, draining the melted ice water, or leaving it in the cooler?
"and has a temperature above 32 degrees Fahrenheit" - Wrong. Water with ice in it will remain at 32F until all the ice is melted (assuming it's not being heated so rapidly convection can't even things out - and if that's the case, you have bigger problems with your cooler).
Feb
10
comment What hand and finger exercises help with climbing?
All good advice, thanks.
Feb
9
comment Is the “Rule of 3” proven for food?
Interesting. Last I heard was two for each of those.
Feb
8
comment Will bug repellent repel deer?
If you can smell it, you can be sure the game can. What you really need is a repellent they won't mind.
Feb
8
comment What proven alternatives are there to DEET?
@RussellSteen It was primarily in there to retain a complete list, but I've removed it.
Feb
3
comment What essential items should go in a small first aid kit?
@RussellSteen Good point, I've updated to reflect that.
Feb
1
comment Do iodine water treatment tablets have negative effects?
Regarding alternatives, see this related question
Feb
1
comment How can I make/improvise a rope on a trip?
@jay you're right, I've also added location.
Feb
1
comment How can I make/improvise a rope on a trip?
@berry120 certainly not climbing, though perhaps a separate question could be asked about getting down when you drop a rope. I've clarified.
Feb
1
comment How to avoid exploding rocks
Sandstone is a particularly bad rock too.
Feb
1
comment Are there any cheap 1:25K electronic maps for the UK or Europe?
@Shog9 It's not too localized; if the problem is the shopping aspect, it should be reopened and re-closed as off-topic.