All living things have instinct that they are born with. Even supposedly "helpless" creatures like human babies. Yes, you need to do a lot to take care of a newborn baby, but a newborn is born with certain instincts that allow it to survive. For instance, if you put a nipple (or a bottle) in a newborn's mouth, it will instinctively suck on it. If newborns didn't have that instinct, they wouldn't be able to eat.

Of course they do make 3V batteries, like the “coin type” CR batteries that power watches. And really defeat OP’s “all electronics use 2 batteries” assertion

The reason for the inconsistency is you are assuming 1 fluid ounce of water weighs 1 ounce, and thus that 1 pint of water weighs 1 pound.

But once again the US unit system is letting you down with its lack of consistency. 1 fluid ounce of water weighs more like 1.04 ounces.

Modulus of elasticity is the relationship between applied stress, and strain.

If you try to bend wood by applying force to it, you are applying a stress, and the amount that it bends is called the strain. 1.8 million PSI is not actually that high of a modulus of elasticity, considering steel's is more like 30 million PSI.

Basically it tells you that wood is resistant to being deformed - but steel is significantly more resistant to being deformed.

While pounds are indeed a unit of force, most people treat them as a unit of mass assuming Earth's gravity.

When someone says that 1 pound is 454 grams, they mean a mass that weighs 1 lb in Earth's gravity has a mass of 454 grams.

The key reason you're missing is that planes generate lift by moving through the air. As they fly higher, the air is thinner, and thus produces less lift. Planes would eventually reach an altitude where they can no longer climb because they can no longer generate enough lift to climb any higher.

It's not terribly complicated. The contents of the can are under pressure. There's a valve on top of the can. When you open the valve, some of the contents come out because fluids flow from high pressure to low pressure.

There aren’t “like 20,” there are exactly 20 lol

We have them in Canada too, look up Trinity Western University for example. Our Charter also allows the free exercise of religion, as long as it doesn't violate the Canadian Human Rights Code

Desalination isn't particularly hard at a small scale.

The issues with desalination - the area around the plant gets saltier than the rest of the ocean (you have to dump that excess salt somewhere,) which kills all the marine life in the vicinity of the plant. Also, humans need a ton of water, so the plants need to be very large to fulfill all the domestic demand. And since the plants are at sea level, you need large pumps to get all that desalinated water into pressurized pipes - which means you need a lot of power.

If you were a horse, it’d only be one response. They can’t vomit, so when they eat something that gives them an upset stomach… they just die

Not exactly. In a rotating engine, power is engine torque multiplied by rotations per minute. Electric motors don’t produce peak power at all engine speeds, because in order to do that, they’d have to produce peak torque at 1 rpm and then have the amount of torque produced gradually decrease as the engine speeds up.

What electric motors do is produce consistent torque at all engine speeds. They still have a power curve, it just looks a bit different than an ICE.

With an ICE, you only get peak torque at a certain engine speed, and you actually get less torque when the engine is going too fast.

It’s called Helmholtz resonance. The sound is bouncing off of the bottom of the container and reverberating between the top of the container, and the top of the water. As the container fills, there’s less room for the sound waves to reverberate, which makes the waves shorter, and thus sound higher pitched

Solanaceae, or the Nightshades, are a family of flowering plants. It's a pretty broad category of plants, including things like tomatoes, eggplant, and potatoes, but also tobacco, goji berries, and a bunch of different decorative plants.

Some nightshades are poisonous (like the aptly named Deadly Nightshade - Atropa belladonna.) Some nightshades will make you hallucinate. Some have medicinal properties.

Celsius degrees and Fahrenheit are both different amounts (a difference of 1°C is a difference of 1.8F,) and the scales start at different places (0°C is 32F.)

So the actual conversion formula is that you have to multiply by 1.8 and then add 32.

> say, if the child is on a surface with ~zero friction, as if they were on ice skates

A better approximation of a frictionless surface would be standing on ice in tennis shoes. Wearing ice skates is not a frictionless surface because the blades have edges that cut into the ice.

Otherwise a great explanation.

There have been a couple of different survey systems over the years. A lot of Western North America was laid out using what are called Survey Townships - basically, you make a square that is 6 miles long by 6 miles wide. That gives you 36 square miles. An area of 1 square mile is called a "Section," so within a survey township you have 36 sections. Sections could be further subdivided into quarter-sections (160 acres,) or even smaller units at will. This is also why if you look at the map of counties in most states west of the Mississippi, most of the counties are squares.

How did you know the boundaries? The General Land Office, which was an office of the US Government during the time of westward expansion, hired surveyors to mark out the boundaries. They would literally hammer large spikes into the ground at the corners of properties.

In fact, to this day, you can often see property stakes. Nowadays they're more likely to be made of wood, but some of the old iron pins are still out there.