To be fair, the diversity of BBQ sauces is enormous. Ketchup (or other tomato base) is not even required. The above recipe falls well within the bounds of BBQ sauce.

Right, like I said reassessments do need to happen and that is a tricky issue. But houses that have just sold should be easy to assess.

Any open market sale should be close enough. I mean obviously if you sell it to your friend or family member for $1 that shouldn't count.

If a home sold for $X it should automatically be reassessed at $X. Not a penny more or a penny less. I don't understand why it doesn't work this way, it's just obvious. Property taxes are based on the market value, and you have just established an exact market value. Obviously reassessments still need to take place and that's still a thorny issue, but if a house has just sold it seems open and shut.

No, the main fear at stadiums is bombs. Well that, and people sneaking in without paying. I'm actually very surprised to hear that there isn't much security at European stadiums.

Basically this.

They were primarily sent to recover Allied supplies that had been sent to Russia before it withdrew from the war and to aid the Czechoslovak Legion, who were trying to escape Russia (which is an amazing story of it's own).

Basically the Siberian Anabasis.

Also making Czechoslovakia the only nation to be undefeated in naval combat!

A bike pump is cheap and most will work with car tires.

So why is this the most effective way of compressing fusion fuel?

Archaeological and linguistic evidence points overwhelmingly elsewhere. The prevailing hypothesis on the origin of Indo-European languages is the Kurgan Hypothesis. It suggests an origin in the Pontic steppe among a migratory people, who then spread westward into Europe and east and then south into Persia and India.

They didn't exactly choose, their hand was forced by the American Revolution. Before the American Revolution, they very much considered North America to be the most important part of their overseas empire. Their holdings in India consisted of a few trading posts and they had just recently acquired Bengal. After the American Revolution they had lost the core of their North American holdings, so their attention shifted to India. They rapidly expanded their territory in India until they controlled nearly the entire subcontinent, and to secure their trade routes to India they also conquered South Africa.

Thus the British Empire is divided into two eras: the [First British Empire](https://en.wikipedia.org/wiki/British_Empire#%22First%22_British_Empire_(1707%E2%80%931783)), focused on North America, and the [Second British Empire](https://en.wikipedia.org/wiki/British_Empire#Rise_of_the_%22Second%22_British_Empire_(1783%E2%80%931815)), focused on India.

Getting the mass of a planet is very difficult and can basically only be done by observing gravity, so it would be circular to use the planet's mass to calculate gravity. Instead you you can observe the orbit of something like a moon around the planet, based on the distance from the planet and time of the orbit you can easily calculate gravity.

> Step 1 is to measure the mass of the planet. This is surprisingly easy. Just need to catch a view of some object in orbit around the planet (like a moon) or passing near the planet (like a comet). If you can a couple of good observations, preferable over several weeks, you can calculate the mass of the planet using newton's laws of motion.

Measuring the mass of a planet is actually very hard, but observing a moon tells you the gravitational acceleration, which is what we actually want here. So we just cut out mass altogether and calculate surface gravity based on the gravity that we observe pulling on the moon.

You're also 0.5% lighter by moving from one of the poles to the equator, because of centrifugal forces and because the Earth bulges at the equator.

It's actually very difficult, because we have to derive it from gravity, and measuring gravity is very difficult. Actually, measuring the acceleration due to gravity is quite easy, that's what /u/lacgibra described. The trouble is measuring the gravitational constant. Of all the fundamental physical constants, the gravitational constant is the one that is known to the least accuracy. The classic experiment for this is Cavendish's experiment, and indeed this was originally conducted in order to estimate the mass of the Earth. This is still basically the technique used, but with much more precise equipment.

Fun fact: We know the mass of the other planets as a ratio to the mass of the Earth much more precisely than we know their absolute mass. This is because the uncertainty in the gravitational constant is greater than the uncertainty in the acceleration due to the planets that we can measure.

For a planet sized object you can safely assume that the center of mass will effectively be it's geometric center.

The Khmer Rouge started the war by raiding Vietnamese villages, but the Vietnamese invasion and occupation of Cambodia, which was the vast vast majority of the war, was not a defensive operation. I don't know if maybe you're taking this as some kind of moral judgement, because it's definitely not. It's just a fact that an invasion is inherently offensive.

Die a hero or live long enough to see yourself become the villain. Kennedy chose the first.

> Maybe Bush II should have read the memo?

Well Saddam was genuinely unpopular. There's a reason his regime collapsed nearly overnight and most of the Iraqi army simply fled. The problem in Iraq was our complete lack of understanding of the factional tensions and our inability to establish a competent and popular government.

Cambodians were happy to get rid of the Khmer Rouge, but they were not happy with the Vietnamese puppet government or the Vietnamese soldiers who remained for years. There is a reason that the Third Indochina War lasted 16 years and ended with Vietnam's withdrawal.

He's not talking about the Vietnam War, he's talking about the Third Indochina War, in which Vietnam invaded and occupied Cambodia. Vietnam was very much not fighting a defensive war there.

> So occasionally some dark matter will go through Earth. How much is unknown

It's actually pretty easy to estimate. Since we know the average density of dark matter in the galaxy, and we know that it's essentially uniformly distributed (it doesn't clump up like regular matter), we know that the density is the same around Earth. It's negligible compared to the mass of the earth, but enough that you can assume there is constantly dark matter passing through your body.

> The electromagnetic interaction between the mystery particle and the photon puts the particle in a different state than it was before. This is generally what we mean when we say that observing a quantum state "changes the outcome".

This is the observer effect, and while it is also an issue when trying to make very small or very precise measurements, it is unrelated to the quantum physics question of what exactly an "observation" is for the purposes of wavefunction collapse.