Recent comments in /f/todayilearned

Guardax OP t1_jdrd9zr wrote

Jimmy Carter had a very detailed knowledge about what he was protecting, and rebuffed GOP Alaska Senator Ted Stevens trying to sneak in changes to better help land developers:

> We never would have had the Alaska lands bill, which doubled the size of the National Park Service. Carter was down on his hands and knees with the maps on the floor of the Oval Office, and when Ted Stevens, the senator from Alaska, came in and tried to buffalo him and tell him, ‘I’ll vote for the bill if you exclude these areas,’ Carter said, ‘No, those are the headwaters of this, and there’s habitat there.’ In a limo on the way back to Capitol Hill, Stevens said to an aide, ‘That son of a bitch knows as much about my state as I do.’ If he hadn’t done that, that bill would have been gutted and the developers would have gotten their way.

Source: https://www.outsideonline.com/outdoor-adventure/environment/jimmy-carter-outdoors-president/

280

The_Flurr t1_jdrcp2x wrote

0

Different_Bake_7 t1_jdrbulf wrote

The first simplest transistors were invented, which is basically a tiny voltage driven electric switch, but they weren't that small, considering today the smallest of integrated circuit chips, can contain millions of transistors ! They were however smaller than vacuum tubes, hence the first portable transistor radio. uniac and ENIAC were the first mainframe IBM computers, that ran on both tubes and solid state components, yet filled up an entire room !.... And about a tenth as powerful as a Commodore 64 !

so yeah..... Technology was stone age back in the 60s.

2

nrkbarnetv t1_jdr8yio wrote

That specifically talks about eye exercises as adults, and nothing on the effects of (a lack of/ eye stimulation while growing up.

This is typical contrarianism, you pat yourself on the back for finding something tangentially relevant to the topic to dispute a claim.

If you do the opposite Google search, you'll find multiple articles and studies about the importance of eye stimulation in children. Myopia in children is and has been on the rise due to a lack of stimulation.

This finding is recorded in countries who started screening children for myopia years ago, and have statistics to back up that yes, we are indeed seeing increased myopia in children and thus the population in general.

This does not mean eye "exercises" work on adults. Which is what the Harvard article is about.

15

omnichad t1_jdr836d wrote

Your skin and sweat are already the same temperature. Just as you say later on, thermal energy is used to change state to vapor. Because water and skin conduct heat, it will equalize and cool your skin.

Just plain circulating liquid cooling is a closed loop without a state change. Unless you are talking about refrigeration. Then compressed gas is hotter than ambient and then equalizes with surrounding air outside the radiator. And then when the refrigerant is depressurized, it has a lower thermal density than ambient air and can chill things.

0

I2eB6L t1_jdr7sn3 wrote

Everyones argueing my use of the word "make". Im not trying to be scientific, so please can we understand words have multiple uses. The mother makes the baby and everything the do with it. Yes, the father does something, yes, the cells take over themselves. But the mother provides the location and the initial nutrients. We use "make" for situations like this

0

Dubanx t1_jdr6l6f wrote

>Your skin and sweat equalise in temperature until the sweat evaporates or is wicked away.

That doesn't even make sense. Your sweat literally comes from your body. It starts at the exact same temperature as your body. It can't take warmth from your body until it's the same temperature as the rest of your body since it was already at body temperature to begin with.

Sweating is entirely a form of evaporative cooling. Even the wikipedia articles says as much.

Buy a bottle of canned air and spray it. You can feel the bottle cool down dramatically to the point where it can cause frostbite as the compressed liquid inside turns to vapor. To the point where the bottle will stop working if you run it for too long.

Take a cooler full of ice, place a thermometer in it, and add salt. Since the ice will melt without heat being added the water will drop in temperature dramatically compared to the ice you started with.

Here is a god damn youtube video of someone freezing water by boiling it in a vacuum.

0