The h Bar

enumaris

12:01 AM

O___O

Cup Fever

have you guys seen this?

1

Q: Why is the Croatian football team so successful despite having a population of only 4 million people?

Not only did they crush Argentina by 3-0 in this 2018 world cup, they also humiliated another traditional 'football power' England and made it to the finals despite their population being less than ten percent that of England's and despite not having the high profile soccer leagues that the other...

Avantgarde

haha

So more population = better team?

Wait, how is England a football power

danielunderwood

Didn't you see how well the US did?

Nick Alexeev

@Avantgarde I'm curious, why UV?

Cup Fever

Also China and India

@NickAlexeev E = hf

Nick Alexeev

12:19 AM

There was a lased developed for the F-35, and a LaWS (fielded by the Navy). I wasn't able to find a reference for the wavelength.

Airborne laser (ABL) was IR.

Emilio Pisanty

1:04 AM

@NickAlexeev nope, it is not.

18

Q: Are engineering questions appropriate for this site?

Often we get questions of the form "How to build this particular device?" or "Why was this design implemented in such-and-such product?" Are these questions appropriate for Physics Stackexchange?

discussion faq scope

danielunderwood

1:41 AM

Are there any good uses of a Lagrangian's freedom to add a total derivative?

Ender Look

2:02 AM

Could I make a question? If we have Earth and we cut into two halves, then we separate them a few meters, would each half attract with gravity the other half or they are too close that gravity doesn't work? (I've read that in the Earth's core there isn't gravity because it pulls from everywhere) Would in this scenario the same happen?

Avnish Kabaj

4:41 AM

@EnderLook no

The core is at the center

Cows

5:20 AM

Today's code takes the biscuit

David Z

6:55 AM

@EnderLook Gravity still works in the Earth's core. It's just that it pulls on you in all directions equally(ish), which means that all cancels out and you don't actually feel anything. Unlike on the surface where the gravity is just pulling you down, and that way you feel it.

Loong

8:48 AM

3

Q: How come we don’t put a huge windmill-like machine in space?

I am new to this sight, but since space being a vacuum there is little to no air resistance at all making a windmill spin forever. There is no wind in space however, if you spin it once, it should keep spinning for a long long time. Now to create energy in a windmill you need the propeller blades...

energy vacuum rotation

And it's a HNQ. :-|

user351417

10:02 AM

Well, we've seen that a huge number of the HNQs from Physics SE have been closed/put on hold over the past week. They usually seem to show no prior research or ask for opinions.

John Rennie

@Chair simple questions often end up on the HNQ list because lots of people look at them. If you write some complicated question about QFT or GR it has very little chance of getting on the HNQ because very few people will look at it.

Somewhere in the meta is a post from me moaning and groaning about this.

user351417

Yeah I've seen that post ;) But there are tonnes of on-topic easy popscience questions...

user351417

The surprising thing is the number of HNQs which are off-topic.

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