Drafts, humidity and radiant (+ conductive) heat.

What you experience, and what determines your level of thermal comfort, is how quickly your body loses heat to the environment. Your body is constantly producing heat in the process of staying alive and has to get rid of it, but it doesn't want to lose heat too quickly either - if it does, that's when you feel cold.

The (average) temperature of the air around you is a major influence in all this, but it's far from the only one.

Let's start with drafts. Recall that I said that your body is dumping heat to its surroundings. This includes the air directly near your body. As a result, this air heats up. Now, if the air is relatively still (doesn't move much), then this results in a kind of blanket of warmer air forming around your body over time, which slows down your body's heat loss. On the other hand, if the air is moving, then the air warmed by your body gets blown away and replaced with cooler air. As a result, you will feel colder, even though the average temperature in the room is the same. So, one possibility is that your parents' house could be more prone to drafts. This could be simply because of things like gaps in the construction that let outside air in (e.g. gaps around doors or windows), but another possibility is poor insulation. Cold floors, walls and windows cause air to cool down and sink. The sinking air causes other air to move in to take its place, and thus a thermal draft is born. Whatever the cause, these drafts will make you feel colder, even if you measure the same temperature on a thermometer.

Next up, humidity. This is a pretty simple one. Humid air has a larger capacity to absorb heat than dry air. So, humid cold air will sap heat away from your body faster than dry cold air of the same temperature (on the other hand, humid air will make it harder for your body to cool down in a hot environment - so high humidity is always bad for thermal comfort). If your parents’ place is more humid, then it will feel colder at 14°C than your own house does.

Finally, there’s the effect of radiant heat. All warm things (i.e. warmer than absolute 0) radiate heat in the infrared spectrum, including walls, windows, floors and furniture. Your body absorbs this radiant heat. So, the more radiant heat you receive from your surroundings, the warmer you will feel. This, by the way, is also why you feel warmer when the radiators are on, versus when they are off, even if the temperature of the room is the same. Why does this matter? Well, the temperature that your thermostat or thermometer measures is the air temperature in the room. Mostly, everything in the room will be at that same temperature. However, walls, floors and windows might be quite a bit colder, especially if (again) you have poor insulation (and/or if you have many walls with the outside, rather than walls with neighboring houses or apartments). So even if the air temperature is 14°C, if your walls, floors and windows are all at (say) 9°C, that means you receive less radiant heat from them than if they were at 12°C or even 14°C. In short, your parents might have colder walls, floors and windows than you do at home, and so you are receiving less heat from your surroundings there.

This latter point is exacerbated if you are in direct contact with these cold surfaces, which is mainly a problem with cold floors. In that case the issue isn’t just a lack radiant heat – you’ll also be losing heat through conductive heat transfer.

(On a final note, I'm surprised that 14°C would ever feel warm and comfortable to you. That seems very chilly to me even in a well-insulated house. )

I want to take another approach here.

There are some changes we can make to geography that are cost effective.

Forestry and agriculture changes can make effective changes to microclimate.

If we plant trees alongside a river in an area that was formerly cropland along the river, we MAY reduce evaporation of the river water by giving it shade.

If we plant crops known for stabalizing soil, we may be able to reduce desertification in some instances.

The trick is to tailor your solution to fit your problem.

I live in an area where dykes were build to change tidal floodplains into agricultural areas. I'm sure it changed the microclimate over the last 300 years.

• The number of places where this can be helpful is low.

• Many places people want to change climate there is no cost effective solution.

• So many unintended consequences when you are changing places that have developed over thousands of years regarding ecology and plant and animal species. Do you really want to cause species to go extinct?

• cost effectiveness. - there are less expensive ways to approace the problem.

Is it okay to consume sugar in the form of natural foods such as fruits or should these be limited?

My theory is that sugar makes kids really really happy. Which makes them hyper.

I don't let my kid have sugar except for small treats after meals or on special occasions because sugar is terrible for everyone. Eating less sugar also makes healthier things like fruit taste sweeter so they're more attractive options

That's not the question. The question is literally "Why do most airlines still use 2-pin audio jacks for the in-flight entertainment systems on their planes?"

Well back when she was bathing you, it was probably about as big as she'd ever seen.

(I'm saying your dad has a little willie too. :D)

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This is the real answer. Also drinking soda right before brushing your teeth diminishes the effect of brushing because of the residual sugars in your mouth.

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Children can be easily wound up and get hyper/ energized easily. This equates to them not being able to sleep/ you not able to get them to bed. Sleep is very critical (frankly for everyone) for a childs growth and development. Giving them sugar and caffeine before bed is like dumping gas on a fire and wondering why it's not going out.

The question isnt why they're not changing to Bluetooth. It's why they use dual 3.5s instead of a single 3.5.

I've been on almost 20 flights the last 5 years and they have all had the standard single 3.5mm jack that's compatible with most headphones.

There’s a lot of people posting about sugar rushes and things like that. So I wanted to offer something different

As someone in food science. Sugar is one of the worst things out their for your health to eat. Yes in nature sugar exists but our bodies have to deal with much higher doses (read amounts) of sugar alllll at once. So the act of clearing that out of your blood is not good when you have to go into this extreme everyday. It’s also crazy how good companies have gotten at customizing sugar to their needs(what makes food more addictive/tasty).

They work, they're simple to set up and use, they're cheap, and if something goes wrong you can quickly replace the headset.

Let's say an airline switched to Bluetooth. First, they'd have to upgrade every entertainment console on every plane in their fleet and buy new headsets. That's expensive. Worse, you're guaranteed to have problems with the new setup. Bluetooth isn't as reliable as a wire. There will be incidences where a passenger's headset doesn't connect to the console, or does but there's no audio. The only people to turn to are the flight attendants and they aren't tech support. 2-pin headsets are easy to use. If something goes wrong they're either not plugged in or need to be replaced. Both can be easily done by the flight attendants.

Less food = more air

Grade/terrain. Depending on laws usually 4% is max safe grade otherwise dangerous in winter etc. roads are needed to zigzag up slopes. Erosion is also an issue

If your sense of humour is that dry, maybe you should keep digging for water.

But there is usually caffeine in soda.

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I don't let my kids have sugar at night because they've already had dinner and brushed their teeth

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Thanks!

Thanks for taking the time to share all that. More recently, an infamous chap was called Osama...and near the end of his life, the news began calling him Usama.

Same with Khadaffi/Gudaffi

A small distinction, but it reflects the difficulty in translating a foreign name into english...

Even if this in itself might be a myth, kids shouldn't be drinking or eating any highly processed foods that are high in sugar. Not even adults should. Kids shouldn't drink fruit juices either. They aren't as healthy as some people think.