Ask a physicist anything. (5)

[mzungu]

Is this cool or what? Watch the part at the 34th second! WOW! It even walks on ice without falling!!!!!!

YouTube - Boston Dynamics Big Dog (new video March 2008)

 

[Wiccan_Child]

That thing freaks me out. Uncanny valley, anyone?

 

[mzungu]

That thing freaks me out. Uncanny valley, anyone?

HEY that's my grandpa you talking about!!!

 

[Assyrian]

Did you see the way that man was kicking it? Is it any wonder robots turn on us?

 

[mzungu]

ASK A KING ANYTHING lol!
​

Can anyone answer the last question?
YouTube - The Bridge of Death

 

[SithDoughnut]

style.org > Estimating the Airspeed Velocity of an Unladen Swallow

 

[Deleteriousnonsense]

I thought the last question was "How do you know so much about 'swallows'?" I think the answer to that is self-evident.

 

[mzungu]

I thought the last question was "How do you know so much about 'swallows'?" I think the answer to that is self-evident.

By Jove I think you've got it

Now let's see if you can answer if Coconuts can be transported by Swallows (I bet SithDoughnut will beat you to it) :

YouTube - Are you suggesting coconuts migrate?

 

[SithDoughnut]

Coconuts weigh about a pound, swallows weigh about 5 ounces. The weight would be too much for the swallow to carry. Even if it had the weight, you'd have to consider that coconuts are not exactly going to be easy to transport by claws or a much smaller beak.

 

[mzungu]

Coconuts weigh about a pound, swallows weigh about 5 ounces. The weight would be too much for the swallow to carry. Even if it had the weight, you'd have to consider that coconuts are not exactly going to be easy to transport by claws or a much smaller beak.

 

[Gracchus]

Now I have read that if one were to fall into a black hole one would become "spaghettified", that is to say, stretched by tidal forces.

Spaghettification - Wikipedia, the free encyclopedia

But as one falls into the black hole one's speed would approach the speed of light, nicht wahr? And so then the Fitzgerald Contraction would cause one to shorten in the direction of the acceleration, and this would lessen the tidal effect.

So, my question is: Would the shortening be enough to counter the tidal effects and prevent "spagghettification"?

And if you did not fall directly into the black hole, but spiralled in, your orbital velocity at right angles to the gravitational acceleration would also increase as your orbit became smaller, and your increasing wavelength would make your position increasingly indeterminate.

Would that make you a "spaghetti-o" or would you just become a string?

(I'm sorry, but it is two thirty in the morning, and this is the time I think about things like that.)

 

[mzungu]

Now I have read that if one were to fall into a black hole one would become "spaghettified", that is to say, stretched by tidal forces.

Spaghettification - Wikipedia, the free encyclopedia

But as one falls into the black hole one's speed would approach the speed of light, nicht wahr? And so then the Fitzgerald Contraction would cause one to shorten in the direction of the acceleration, and this would lessen the tidal effect.

So, my question is: Would the shortening be enough to counter the tidal effects and prevent "spagghettification"?

And if you did not fall directly into the black hole, but spiralled in, your orbital velocity at right angles to the gravitational acceleration would also increase as your orbit became smaller, and your increasing wavelength would make your position increasingly indeterminate.

Would that make you a "spaghetti-o" or would you just become a string?

(I'm sorry, but it is two thirty in the morning, and this is the time I think about things like that.)

Unless you cross the event horizon then the tidal forces would have almost no effect on you supposing that you can survive the extreme radiation. Actually if you were to cross the event horizon then the effects would vary in accordance to if the black hole were a supermassive black hole or one of a lesser size. (The tidal forces may even be less than that of Earth's at the event horizon, depending again on the size of the black hole).

Also one person crossing the event horizon will be in a free fall and it would take less than a second to reach the singularity. Can someone calculate the eventual speed reached from the event horizon till the singularity? Could it possibly break the C barrier? Also time slows down as one approaches the singularity and I am sure this may also effect the way the tidal forces will act on the body.

Say that the feet have a slower time relative to the head. If both are travelling at C then obviously the feet will be compressed and not stretched resulting in a paradox. How can a mass be compressed while at the same time it is stretched?

I suspect that we have to delve into the quantum level in order to actually see what happens to the atomic bond!

And I always though that religion was weird!

[pong] [/pong]

 

[Wiccan_Child]

Now I have read that if one were to fall into a black hole one would become "spaghettified", that is to say, stretched by tidal forces.

Spaghettification - Wikipedia, the free encyclopedia

But as one falls into the black hole one's speed would approach the speed of light, nicht wahr? And so then the Fitzgerald Contraction would cause one to shorten in the direction of the acceleration, and this would lessen the tidal effect.

So, my question is: Would the shortening be enough to counter the tidal effects and prevent "spagghettification"?

Only if the tidal forces are sufficiently shallow - in, for example, a supermassive black hole, found in all good galactic cores.

And if you did not fall directly into the black hole, but spiralled in, your orbital velocity at right angles to the gravitational acceleration would also increase as your orbit became smaller, and your increasing wavelength would make your position increasingly indeterminate.

Would that make you a "spaghetti-o" or would you just become a string?

You'd be sort of a spiral, since you'd go in with each revolution, and your back end would follow. Plus, I'm not sure its possible to orbit a black hole as you plummet to its cold, hard depths...

 

[Steffenfield]

Ooh. I just remembered something.

I saw a video like 25 years ago about the tribulation years.

One part of it claimed that our bodies would be so heavy during this time that we could barely even move.

Is there any possible chance that the gravitational pull on Earth could ever become greater than what it already is?

 

[Assyrian]

Coconuts weigh about a pound, swallows weigh about 5 ounces. The weight would be too much for the swallow to carry. Even if it had the weight, you'd have to consider that coconuts are not exactly going to be easy to transport by claws or a much smaller beak.

So how many swallows would it take?

 

[mzungu]

So how many swallows would it take?

Convert those imperial weights into metric and I shall be happy to calculate that for you!

 

[mzungu]

Ooh. I just remembered something.

I saw a video like 25 years ago about the tribulation years.

One part of it claimed that our bodies would be so heavy during this time that we could barely even move.

Is there any possible chance that the gravitational pull on Earth could ever become greater than what it already is?

Not unless the earth increased in mass. One way to do that is to force one of the planets to collide with earth but this will annihilate all life on earth and possibly create a second moon!

Another way to feel so heavy as to fail to stand up is to stay awake for two nights and climb (by running) 200 flights of stairs. Then sit down for one hour and I guarantee you (if you are still breathing) that you will not even be able to lift a finger. You will feel as if you were made of lead.

 

[Wiccan_Child]

Ooh. I just remembered something.

I saw a video like 25 years ago about the tribulation years.

One part of it claimed that our bodies would be so heavy during this time that we could barely even move.

Is there any possible chance that the gravitational pull on Earth could ever become greater than what it already is?

The Earth would have to become more dense, or more massive, neither of which are particularly likely.

 

[mzungu]

From the best site ever:This documentary gets better by the minute. There are amazing things shown. Watch the whole thing! No one makes better documentaries than BBC
"The monkey realised he did not need to move his arm in order to control the computer.........."
http://topdocumentaryfilms.com/human-v2-0/

 

[godisreal36]

Gods word can make a murderer love instead of hate. Gods power is real. A monkey showing some intelligence doesn't surprise me. But God does, he is real.