A thread for thoughts and questions that randomly pop into your head.

If Quantum computing becomes feasible would it spell the end of crypto currency as it may mean its much easier to mine
Plus I wonder if you were a sysop of a supercomputer could you fiddle the books say its booked out and mine it.

I wonder if rocket builders can get insurance if they blow up/goes wrong or is the very nature of it mean its uninsurable

Cymek said:

A thread for thoughts and questions that randomly pop into your head.

If Quantum computing becomes feasible would it spell the end of crypto currency as it may mean its much easier to mine
Plus I wonder if you were a sysop of a supercomputer could you fiddle the books say its booked out and mine it.

I wonder if rocket builders can get insurance if they blow up/goes wrong or is the very nature of it mean its uninsurable

It’s often said that the Sun casts sharp-edged shadows on the Moon. The sun Is a disc so why doesn’t it cast umbra and penumbra shadows?

• I wonder if rocket builders can get insurance if they blow up/goes wrong or is the very nature of it mean its uninsurable

I wouldn’t have thought insurance was possible…

furious said:

• I wonder if rocket builders can get insurance if they blow up/goes wrong or is the very nature of it mean its uninsurable

I wouldn’t have thought insurance was possible…

Why not? The risks are certainly well known.

sibeen said:

furious said:

• I wonder if rocket builders can get insurance if they blow up/goes wrong or is the very nature of it mean its uninsurable

I wouldn’t have thought insurance was possible…

Why not? The risks are certainly well known.

well, might be possible but could be prohibitively expensive…

furious said:

• I wonder if rocket builders can get insurance if they blow up/goes wrong or is the very nature of it mean its uninsurable

I wouldn’t have thought insurance was possible…

Qantas didn’t insure their fleet. The premiums would have about the equivalent of one aircraft per year.

sibeen said:

furious said:

• I wonder if rocket builders can get insurance if they blow up/goes wrong or is the very nature of it mean its uninsurable

I wouldn’t have thought insurance was possible…

Why not? The risks are certainly well known.

Yep. There’d be an actuary somewhere who could calculate the right premium.

furious said:

• I wonder if rocket builders can get insurance if they blow up/goes wrong or is the very nature of it mean its uninsurable

I wouldn’t have thought insurance was possible…

No so they must wear the cost if it blows up

Tamb said:

furious said:

• I wonder if rocket builders can get insurance if they blow up/goes wrong or is the very nature of it mean its uninsurable

I wouldn’t have thought insurance was possible…

Qantas didn’t insure their fleet. The premiums would have about the equivalent of one aircraft per year.

They would probably have third party insurance. Surely…

Cymek said:

furious said:

• I wonder if rocket builders can get insurance if they blow up/goes wrong or is the very nature of it mean its uninsurable

I wouldn’t have thought insurance was possible…

No so they must wear the cost if it blows up

Astronauts and passengers as well perhaps, they sign a clause you accept the risks

furious said:

sibeen said:

furious said:

• I wonder if rocket builders can get insurance if they blow up/goes wrong or is the very nature of it mean its uninsurable

I wouldn’t have thought insurance was possible…

Why not? The risks are certainly well known.

well, might be possible but could be prohibitively expensive…

Yes, it would be that.

furious said:

Tamb said:

furious said:

• I wonder if rocket builders can get insurance if they blow up/goes wrong or is the very nature of it mean its uninsurable

I wouldn’t have thought insurance was possible…

Qantas didn’t insure their fleet. The premiums would have about the equivalent of one aircraft per year.

They would probably have third party insurance. Surely…

Yes. It was just the aircraft which were uninsured.

Tamb said:

Cymek said:

A thread for thoughts and questions that randomly pop into your head.

If Quantum computing becomes feasible would it spell the end of crypto currency as it may mean its much easier to mine
Plus I wonder if you were a sysop of a supercomputer could you fiddle the books say its booked out and mine it.

I wonder if rocket builders can get insurance if they blow up/goes wrong or is the very nature of it mean its uninsurable

It’s often said that the Sun casts sharp-edged shadows on the Moon. The sun Is a disc so why doesn’t it cast umbra and penumbra shadows?

That’s an interesting question, Tamb.

Michael V said:

Tamb said:

Cymek said:

A thread for thoughts and questions that randomly pop into your head.

If Quantum computing becomes feasible would it spell the end of crypto currency as it may mean its much easier to mine
Plus I wonder if you were a sysop of a supercomputer could you fiddle the books say its booked out and mine it.

I wonder if rocket builders can get insurance if they blow up/goes wrong or is the very nature of it mean its uninsurable

It’s often said that the Sun casts sharp-edged shadows on the Moon. The sun Is a disc so why doesn’t it cast umbra and penumbra shadows?

That’s an interesting question, Tamb.

maybe it does and the low atmosphere means they’re still sharper than on earth

SCIENCE said:

Michael V said:

Tamb said:

It’s often said that the Sun casts sharp-edged shadows on the Moon. The sun Is a disc so why doesn’t it cast umbra and penumbra shadows?

That’s an interesting question, Tamb.

maybe it does and the low atmosphere means they’re still sharper than on earth

I’ve put my thinking cap on and done some reading. I’m convinced by geometry that sun-cast Umbral and Penumbral Shadows occur on the moon. Shadow boundaries will be sharp rather than diffuse, because there is no atmosphere. The interior of the umbral shadow will be uncoloured. (The umbral shadow on earth is faintly blue, due to atmospheric Raleigh Scattering.)

I am unsure about colouring of the penumbral shadows. I am also unsure whether or not penumbral interference effects seen on Earth will be observed on the moon.

Michael V said:

SCIENCE said:

Michael V said:

That’s an interesting question, Tamb.

maybe it does and the low atmosphere means they’re still sharper than on earth

I’ve put my thinking cap on and done some reading. I’m convinced by geometry that sun-cast Umbral and Penumbral Shadows occur on the moon. Shadow boundaries will be sharp rather than diffuse, because there is no atmosphere. The interior of the umbral shadow will be uncoloured. (The umbral shadow on earth is faintly blue, due to atmospheric Raleigh Scattering.)

I am unsure about colouring of the penumbral shadows. I am also unsure whether or not penumbral interference effects seen on Earth will be observed on the moon.

Thanks for the input. Maybe if we could get some moon shadows images.

Tamb said:

Michael V said:

SCIENCE said:

maybe it does and the low atmosphere means they’re still sharper than on earth

I’ve put my thinking cap on and done some reading. I’m convinced by geometry that sun-cast Umbral and Penumbral Shadows occur on the moon. Shadow boundaries will be sharp rather than diffuse, because there is no atmosphere. The interior of the umbral shadow will be uncoloured. (The umbral shadow on earth is faintly blue, due to atmospheric Raleigh Scattering.)

I am unsure about colouring of the penumbral shadows. I am also unsure whether or not penumbral interference effects seen on Earth will be observed on the moon.

Thanks for the input. Maybe if we could get some moon shadows images.

I think I can see penumbral shadows in this image entitled “Shadow astronauts: Dave Scott and Jim Irwin on the Apollo 15 mission, 1971. Credit: NASA”

https://phys.org/news/2019-03-shadows-moon-tale-ephemeral.html

Michael V said:

Tamb said:

Michael V said:

I’ve put my thinking cap on and done some reading. I’m convinced by geometry that sun-cast Umbral and Penumbral Shadows occur on the moon. Shadow boundaries will be sharp rather than diffuse, because there is no atmosphere. The interior of the umbral shadow will be uncoloured. (The umbral shadow on earth is faintly blue, due to atmospheric Raleigh Scattering.)

I am unsure about colouring of the penumbral shadows. I am also unsure whether or not penumbral interference effects seen on Earth will be observed on the moon.

Thanks for the input. Maybe if we could get some moon shadows images.

I think I can see penumbral shadows in this image entitled “Shadow astronauts: Dave Scott and Jim Irwin on the Apollo 15 mission, 1971. Credit: NASA”

https://phys.org/news/2019-03-shadows-moon-tale-ephemeral.html

And this one too, from the same source.

https://phys.org/news/2019-03-shadows-moon-tale-ephemeral.html

What a strange piece

Ian said:

https://phys.org/news/2019-03-shadows-moon-tale-ephemeral.html

What a strange piece

Yes, it is odd. But it had the photos…

I wonder which is the rarest emotion humans feel or even if some exist we haven’t experienced as they are tied to a something no one has achieved

Cymek said:

I wonder which is the rarest emotion humans feel or even if some exist we haven’t experienced as they are tied to a something no one has achieved

Elation is fairly rare.

Tamb said:

Cymek said:

I wonder which is the rarest emotion humans feel or even if some exist we haven’t experienced as they are tied to a something no one has achieved

Elation is fairly rare.

Yes I was thinking something like that, say you experience it if you see the Earth from orbit or even from the moon.

Cymek said:

I wonder which is the rarest emotion humans feel or even if some exist we haven’t experienced as they are tied to a something no one has achieved

Nirvana…

Cymek said:

Tamb said:

Cymek said:

I wonder which is the rarest emotion humans feel or even if some exist we haven’t experienced as they are tied to a something no one has achieved

Elation is fairly rare.

Yes I was thinking something like that, say you experience it if you see the Earth from orbit or even from the moon.

I wonder if robots will develop emotions in the future?

furious said:

Cymek said:

I wonder which is the rarest emotion humans feel or even if some exist we haven’t experienced as they are tied to a something no one has achieved

Nirvana…

LSD?

Cymek said:

Tamb said:

Cymek said:

I wonder which is the rarest emotion humans feel or even if some exist we haven’t experienced as they are tied to a something no one has achieved

Elation is fairly rare.

Yes I was thinking something like that, say you experience it if you see the Earth from orbit or even from the moon.

I wouldn’t think that would be elation. Happiness perhaps.

furious said:

• I wonder if rocket builders can get insurance if they blow up/goes wrong or is the very nature of it mean its uninsurable

I wouldn’t have thought insurance was possible…

It’s the exact opposite. Rocket and satellite builders are not allowed to launch without insurance. It’s one of the legal requirements.

And that’s one reason why rocket launches are so expensive, this insurance is not cheap.

furious said:

• I wonder if rocket builders can get insurance if they blow up/goes wrong or is the very nature of it mean its uninsurable

I wouldn’t have thought insurance was possible…

It’s the exact opposite. Rocket and satellite builders are not allowed to launch without insurance. It’s one of the legal requirements.

And that’s one reason why rocket launches are so expensive, this insurance is not cheap.

> It’s often said that the Sun casts sharp-edged shadows on the Moon. The sun Is a disc so why doesn’t it cast umbra and penumbra shadows?

It does, but the edges of the transition zone are sharp. Much sharper than if the sunlight passed through an atmosphere first.

> If Quantum computing becomes feasible would it spell the end of crypto currency as it may mean its much easier to mine

Depends on the encryption system. When one code gets broken in public you throw it away and use another one.

> Plus I wonder if you were a sysop of a supercomputer could you fiddle the books say its booked out and mine it.

It’s a variant on hacking.

If I knew what you meant by “mine” then I could answer those questions more easily. I know of “data mining” but you seem to have something else in mind as well.

Something a coworker mentioned to me that she finds strange is people asking how you are when they greet you, she said her culture don’t do it (she is from the Philippines)

I said it (I think anyway) not something they really care about its just like an automated greeting and they don’t want the real answer just a I’m good/fine.

Is that really the case or I am just cynical

Cymek said:

Something a coworker mentioned to me that she finds strange is people asking how you are when they greet you, she said her culture don’t do it (she is from the Philippines)

I said it (I think anyway) not something they really care about its just like an automated greeting and they don’t want the real answer just a I’m good/fine.

Is that really the case or I am just cynical

Yep. The standard ‘Airgarn?’ is not really intended to be answered in any detail, IME.

Rule 303 said:

Cymek said:

Something a coworker mentioned to me that she finds strange is people asking how you are when they greet you, she said her culture don’t do it (she is from the Philippines)

I said it (I think anyway) not something they really care about its just like an automated greeting and they don’t want the real answer just a I’m good/fine.

Is that really the case or I am just cynical

Yep. The standard ‘Airgarn?’ is not really intended to be answered in any detail, IME.

Standing up. As you can see.

roughbarked said:

Rule 303 said:

Cymek said:

Something a coworker mentioned to me that she finds strange is people asking how you are when they greet you, she said her culture don’t do it (she is from the Philippines)

I said it (I think anyway) not something they really care about its just like an automated greeting and they don’t want the real answer just a I’m good/fine.

Is that really the case or I am just cynical

Yep. The standard ‘Airgarn?’ is not really intended to be answered in any detail, IME.

Standing up. As you can see.

I don’t bother with it.

Tamb said:

roughbarked said:

Rule 303 said:

Yep. The standard ‘Airgarn?’ is not really intended to be answered in any detail, IME.

Standing up. As you can see.

I don’t bother with it.

No I don’t either

roughbarked said:

Rule 303 said:

Cymek said:

Something a coworker mentioned to me that she finds strange is people asking how you are when they greet you, she said her culture don’t do it (she is from the Philippines)

I said it (I think anyway) not something they really care about its just like an automated greeting and they don’t want the real answer just a I’m good/fine.

Is that really the case or I am just cynical

Yep. The standard ‘Airgarn?’ is not really intended to be answered in any detail, IME.

Standing up. As you can see.

May have mentioned this before.

Back in my UK days I had a colleague whose standard greeting was:

You’re alright,
How am I?

Cymek said:

Tamb said:

roughbarked said:

Standing up. As you can see.

I don’t bother with it.

No I don’t either

Often hear it answered with the same question.
It is just a greeting.

The Rev Dodgson said:

roughbarked said:

Rule 303 said:

Yep. The standard ‘Airgarn?’ is not really intended to be answered in any detail, IME.

Standing up. As you can see.

May have mentioned this before.

Back in my UK days I had a colleague whose standard greeting was:

You’re alright,
How am I?

or how do I look?

Cymek said:

Tamb said:

roughbarked said:

Standing up. As you can see.

I don’t bother with it.

No I don’t either

Hence my standard reply to your “Greetings”: “G’day cymeck.” Not “Good morning cymeck, how are you today?”

Rule 303 said:

Cymek said:

Something a coworker mentioned to me that she finds strange is people asking how you are when they greet you, she said her culture don’t do it (she is from the Philippines)

I said it (I think anyway) not something they really care about its just like an automated greeting and they don’t want the real answer just a I’m good/fine.

Is that really the case or I am just cynical

Yep. The standard ‘Airgarn?’ is not really intended to be answered in any detail, IME.

I do these days. Just today when asked that, I launched into my medical illnesses.
The person asking didn’t listen, but then I didn’t expect them to.
I don’t listen to them when they launch into their legal problems when I ask ‘airgarn?’.

The Rev Dodgson said:

roughbarked said:

Rule 303 said:

Yep. The standard ‘Airgarn?’ is not really intended to be answered in any detail, IME.

Standing up. As you can see.

May have mentioned this before.

Back in my UK days I had a colleague whose standard greeting was:

You’re alright,
How am I?

Both shrinks obviously.

mollwollfumble said:

Rule 303 said:

Cymek said:

Something a coworker mentioned to me that she finds strange is people asking how you are when they greet you, she said her culture don’t do it (she is from the Philippines)

I said it (I think anyway) not something they really care about its just like an automated greeting and they don’t want the real answer just a I’m good/fine.

Is that really the case or I am just cynical

Yep. The standard ‘Airgarn?’ is not really intended to be answered in any detail, IME.

I do these days. Just today when asked that, I launched into my medical illnesses.
The person asking didn’t listen, but then I didn’t expect them to.
I don’t listen to them when they launch into their legal problems when I ask ‘airgarn?’.

I find it gives a chance to get all the complaints out of the way before starting the real conversation.

I’m sure there’s a famous piece of Australian bush literature about this. Goes something like:

“… right whinger …”
“… how’d i be? How’d you think I’d be”
“… my wife … my cattle … my …”
“and you ask me how I’d be”.

Cymek said:

Something a coworker mentioned to me that she finds strange is people asking how you are when they greet you, she said her culture don’t do it (she is from the Philippines)

I said it (I think anyway) not something they really care about its just like an automated greeting and they don’t want the real answer just a I’m good/fine.

Is that really the case or I am just cynical

complex subject but of own culture, more regional, some of it just acknowledgement of someone in near field, humans sense things differently depending on proximity (many animals do, sense presence), and depends if moving toward each other, cross paths whatever, but a lot of such things are an affirmation of non-hostility, really

you could humorously take it mean how’s this life thing and the value of minding your own business

how ya goin’ can be a substantially muted inquiry, lends to

Tamb said:

Cymek said:

A thread for thoughts and questions that randomly pop into your head.

If Quantum computing becomes feasible would it spell the end of crypto currency as it may mean its much easier to mine
Plus I wonder if you were a sysop of a supercomputer could you fiddle the books say its booked out and mine it.

I wonder if rocket builders can get insurance if they blow up/goes wrong or is the very nature of it mean its uninsurable

It’s often said that the Sun casts sharp-edged shadows on the Moon. The sun Is a disc so why doesn’t it cast umbra and penumbra shadows?

The sun and earth do cast an umbra and penumbra on the moon.

dv said:

Tamb said:

Cymek said:

A thread for thoughts and questions that randomly pop into your head.

If Quantum computing becomes feasible would it spell the end of crypto currency as it may mean its much easier to mine
Plus I wonder if you were a sysop of a supercomputer could you fiddle the books say its booked out and mine it.

I wonder if rocket builders can get insurance if they blow up/goes wrong or is the very nature of it mean its uninsurable

It’s often said that the Sun casts sharp-edged shadows on the Moon. The sun Is a disc so why doesn’t it cast umbra and penumbra shadows?

The sun and earth do cast an umbra and penumbra on the moon.

Then why are they referred to as sharp edged?

Tamb said:

dv said:

Tamb said:

It’s often said that the Sun casts sharp-edged shadows on the Moon. The sun Is a disc so why doesn’t it cast umbra and penumbra shadows?

The sun and earth do cast an umbra and penumbra on the moon.

Then why are they referred to as sharp edged?

¿ref

Tamb said:

dv said:

Tamb said:

It’s often said that the Sun casts sharp-edged shadows on the Moon. The sun Is a disc so why doesn’t it cast umbra and penumbra shadows?

The sun and earth do cast an umbra and penumbra on the moon.

Then why are they referred to as sharp edged?

The penumbra is huge, much bigger than the moon itself, so perhaps the gradient in shade is so slight that some authors neglect it.

On the right is the picture of the moon passing through the earth’s penumbra.