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[ShadowHammer]

Ptw

You just year-necro'd a thread to ptw.

.-. Some one just sent me a link to it
I didn't know it was dead
I didn't get a warning for it



Can I still ask random science questions?

Might as well make the necro worth it, so go ahead.

[Redzephyr01]

If an exact copy of the moon appeared in orbit around the earth along with the regular moon, and then the copy vanished after 10 minutes, would it have any lasting effects on earth's orbit?

[Cryxis, Prince of Doom]

What would happen if a black hole the weight of the moon ((approximately the size of a grain of sand)) were to impact the earth?

[Il Palazzo]

What would happen if a black hole the weight of the moon ((approximately the size of a grain of sand)) were to impact the earth?

If an exact copy of the moon appeared in orbit around the earth along with the regular moon, and then the copy vanished after 10 minutes, would it have any lasting effects on earth's orbit?

What do you think would happen?

[Cryxis, Prince of Doom]

E: Probably begin to rip the earth apart as it grew, slowly sucking in chunks of matter and heating everything up as it got sucked it and setting the world ablaze while it took in the small amount of matter it's even horizon would be able to take in

I dunno

[Il Palazzo]

No, but if you try and answer your own question it'll be easier to ascertain your level of knowledge and tailor the answer accordingly.
This is no mean-spirited crap, just a honest attempt at meaningful communication.

Besides, it's always much more satisfying and productive if you manage to reach the answer yourself rather than being spoonfed.

[Cryxis, Prince of Doom]

E: Probably begin to rip the earth apart as it grew, slowly sucking in chunks of matter and heating everything up as it got sucked it and setting the world ablaze while it took in the small amount of matter it's even horizon would be able to take in

I dunno

...
I edited
I thought you asked what would happen not what we thought
Sorry

[Itnetlolor]

What about a black hole the weight of the moon impacting the moon? What then?

EDIT:
Then again, simplified, it would be more: What would happen if a black hole of equal mass to a solid mass were to collide with said solid mass?

[Akura]

When I saw the thread title, I thought it said "The Internet Psychics Thread".

What about a black hole the weight of the moon impacting the moon? What then?

EDIT:
Then again, simplified, it would be more: What would happen if a black hole of equal mass to a solid mass were to collide with said solid mass?

I don't know a whole lot about physics, especially compared to what I've seen in this thread(hence my diappointment that it's not a psychics thread), but I imagine that an impact of an object of same mass but smaller size(and thus, more dense) compared to the object it hits, the object hit is gonna have a nice hole through it.

[Arx]

I think it would depend on the velocity. This is all based on intuition.

At high speeds, the black hole would punch through the object, leaving a narrow hole on one side and a wide hole on the other following a sort of bell curve as the black hole's event horizon increases by sucking in the other mass's matter, assuming the black hole doesn't disintegrate due to the sudden mass gain (which I think is a thing that can happen, but I'm not sure). After it exited, the other mass would probably be drawn into a sort of tail behind it.

If it went slowly, it would just consume the other mass. I think.

[Sheb]

Wouldn't it depend much on the black hole size: too small and it'd evaporate almost isntantly, too big and it's eat the whole other mass.

[TheDarkStar]

At interplanetary speeds (roughly 11 km/s [Earth escape velocity] to 72 km/s [orbiting at Earth speed in the opposite direction]), it would easily liquify (and then devour) the planet. At intersteller speeds, it might be able to pass all the way through.

Fake-edit: putting the numbers into the kinetic energy formula, an 11 km/s impact would yield 8.891 x 10³² joules, enough to liberate every particle of the planet from the gravity of every other particle (although it's only four times the required amount). That's without adding the mass of the black hole, though, so it may not quite be enough.

[Itnetlolor]

Wouldn't it depend much on the black hole size: too small and it'd evaporate almost instantly, too big and it's eat the whole other mass.

For some reason, I'm looking at this like throwing an ice cube at a water balloon (then again, remove the balloon part, and just throwing the ice at the ball of water). Same substance, but still the same mass, but at different densities.

I recently watched a video of boiling nitrogen and solid nitrogen; so I had this in mind.

[My Name is Immaterial]

PTW.
Also, somewhat relevant thing I did.
Another somewhat relevant thing I did:

I'm a native San Diegan, but I'm away from home at college, and I did some math for an essay. I wanted to share my findings with you.
Because they broke my head.

Spoiler (click to show/hide)

A report by Surf-First and the Surfrider Foundation showed that surfers visit the beach 144 times a year per person on average and spend a mean of $58 per visit. We shall determine the number of surfers in San Diego and their economic impact, because we can.

San Diego’s population is 3.2 million, 8.3% of California’s population, as of 2013, as of 2008, 68.5% of all Californians live in coastal counties and 1.1 million Californians surf. Assuming even distribution, which is a silly assumption, but it is one that must be made for this calculation to work, we can see how many San Diegans surf, which is approximately 136,000.

To make some more silly assumptions, we apply the values received from a voluntary survey to the entire population, showing that there are 19.6 million individual visits a year, and that 1.1 billion dollars are spent by surfers per year in San Diego.

That’s a ridiculous amount of money. If San Diego’s beaches are closed for one day, $3,117,446.93 in sales, parking permits, taxes, meals, gas, gear and anything they might spend it on is lost because surfers could not visit the beach.

And that’s just surfers! Those numbers are ignoring other beachgoers!

I need a minute for my brain to reset.

Spoiler: Numbers/Tl;dr: (click to show/hide)

136,000 San Diegans surf.
They visit the beach 19.6 times a year, combined.
Their surf visits contribute over 1 billion dollars a year to the local economy.
That's over 3 million dollars a day.

Sources provided at request.

[Sergarr]

I think it would depend on the velocity. This is all based on intuition.

At high speeds, the black hole would punch through the object, leaving a narrow hole on one side and a wide hole on the other following a sort of bell curve as the black hole's event horizon increases by sucking in the other mass's matter, assuming the black hole doesn't disintegrate due to the sudden mass gain (which I think is a thing that can happen, but I'm not sure). After it exited, the other mass would probably be drawn into a sort of tail behind it.

If it went slowly, it would just consume the other mass. I think.

Actually, it wouldn't. One fun thing about black holes is that they suck so much, that they can't suck everything at once, as the matter sucked in starts to radiate violently. This puts an upper limit on how fast can a black hole grow.

Most likely the Moon will explode.