Science: Everything explained by PV=nRT, F=ma=Gm(1)•m(2)/r^2

[aparch]

Re: Science: Everything explained by PV=nRT, F=ma=Gm(1)•m(2)/r^2

I think it was Scooby who posted an article a few weeks back about how the Dutch have engineered levees and dikes to divert flood waters away from population centers, and how something of that scale would never work in the US because of the political climate.

Welp, it appears to be taking a grassroots effort to get that started, and I came across this article where a costal town in North Carolina did such a project. And it worked.

https://www.csmonitor.com/USA/Societ...&kwp_1=1368849

Hat tip to Facebook's creepy algorithms that suggested this specific article for me because a couple friends like Christian Science Monitor.

[ScoobyDoo]

Re: Science: Everything explained by PV=nRT, F=ma=Gm(1)•m(2)/r^2

I think it was Scooby who posted an article a few weeks back about how the Dutch have engineered levees and dikes to divert flood waters away from population centers, and how something of that scale would never work in the US because of the political climate.

Welp, it appears to be taking a grassroots effort to get that started, and I came across this article where a costal town in North Carolina did such a project. And it worked.

https://www.csmonitor.com/USA/Societ...&kwp_1=1368849

Hat tip to Facebook's creepy algorithms that suggested this specific article for me because a couple friends like Christian Science Monitor.

I did and I appreciate that find. It proves what I was saying. I love Engineering and I love Science. This country can go **** itself.

[FlagDUDE08]

Re: Science: Everything explained by PV=nRT, F=ma=Gm(1)•m(2)/r^2

Another argument against 5G. https://www.naturalblaze.com/2018/10...ol-system.html

[LynahFan]

Re: Science: Everything explained by PV=nRT, F=ma=Gm(1)•m(2)/r^2

Another argument against 5G. https://www.naturalblaze.com/2018/10...ol-system.html

....which will be convincing only to those who are already convinced. OMG - did you know that a flashlight emits photons, the same things emitted by laser weapons???? BAN FLASHLIGHTS!

[joecct]

Re: Science: Everything explained by PV=nRT, F=ma=Gm(1)•m(2)/r^2

SpaceX just launched and landed from Vandenberg AFB on the left coast.

I can sort of work out the math when they launch and recover from the Cape as the earth is rotating towards the booster as it returns.

But the earth is moving *away* from the booster when launching from California. Plus, they launch in a SSW direction which means they need more juice to get back to the launchpad.

How the F do they do it? Math is appreciated, but leave the calculus to a 1.0 level.

[dxmnkd316]

Re: Science: Everything explained by PV=nRT, F=ma=Gm(1)•m(2)/r^2

Um, the physics doesn’t quite work that way. The same reason if you throw a tennis ball up in a car it continues it’s trajectory and doesn’t slow down because the earth is spinning. I

Someone smarter than me can correct me, but the reason we don’t launch much from the west coast is because if **** happens it doesn’t rain down into the US landmass.

[joecct]

Re: Science: Everything explained by PV=nRT, F=ma=Gm(1)•m(2)/r^2

Well the Russkis had a booster failure this AM launching a Soyuz to the ISS. Both astro/cosmonauts returned safely to terra firma.

Will this speed up NASA to get off the dime and certify SpaceX and Boeing as man capable to launch to the ISS?

Nah.

[GrinCDXX]

Re: Science: Everything explained by PV=nRT, F=ma=Gm(1)•m(2)/r^2

Well the Russkis had a booster failure this AM launching a Soyuz to the ISS. Both astro/cosmonauts returned safely to terra firma.

Will this speed up NASA to get off the dime and certify SpaceX and Boeing as man capable to launch to the ISS?

Nah.

That would be a really dumb response to something like this

[JF_Gophers]

Um, the physics doesn’t quite work that way. The same reason if you throw a tennis ball up in a car it continues it’s trajectory and doesn’t slow down because the earth is spinning. I

Someone smarter than me can correct me, but the reason we don’t launch much from the west coast is because if **** happens it doesn’t rain down into the US landmass.

The earth rotates west to east. So anything launched vertically, that was slowed down while in flight would fall into the pacific ocean.

But rockets are only launched vertically for the beginning of a flight. They then arc to attempt to gain orbit. The vertical part is just to get through the thickest atmosphere as quickly as possible.

[Slap Shot]

Re: Science: Everything explained by PV=nRT, F=ma=Gm(1)•m(2)/r^2

The earth rotates west to east. So anything launched vertically, that was slowed down while in flight would fall into the pacific ocean.

But rockets are only launched vertically for the beginning of a flight. They then arc to attempt to gain orbit. The vertical part is just to get through the thickest atmosphere as quickly as possible.

Duh, everyone knows that.

[GrinCDXX]

Re: Science: Everything explained by PV=nRT, F=ma=Gm(1)•m(2)/r^2

SpaceX just launched and landed from Vandenberg AFB on the left coast.

I can sort of work out the math when they launch and recover from the Cape as the earth is rotating towards the booster as it returns.

But the earth is moving *away* from the booster when launching from California. Plus, they launch in a SSW direction which means they need more juice to get back to the launchpad.

How the F do they do it? Math is appreciated, but leave the calculus to a 1.0 level.

I think the problem mostly just simplifies down to how long did they have to burn the first stage for a given mission profile. In this case, the relatively small payload combined with the relatively low orbit were enough to overcome the fact that they weren't getting any boost from the Earth's rotation.

[Jimjamesak]

Duh, everyone knows that.

I did. But I also played Kerbal Space Program.

[RaceBoarder]

Re: Science: Everything explained by PV=nRT, F=ma=Gm(1)•m(2)/r^2

This might be bad, BAD memory from HS Physics, but I thought you wanted to be as close to the equator as possible when launching. That's why we went to Florida for NASA instead of NoDak...

[joecct]

This might be bad, BAD memory from HS Physics, but I thought you wanted to be as close to the equator as possible when launching. That's why we went to Florida for NASA instead of NoDak...

We launch over the North Pole from NoDak.

[dxmnkd316]

Re: Science: Everything explained by PV=nRT, F=ma=Gm(1)•m(2)/r^2

Isn’t that because of the radial velocity being at max at the equator?