This is a trick question. Disregard of speed or force, if time is not a contraint, both can will travel endlessly because there is no friction in space! Just that one may reach earlier than the other (which was not specify in the question).


This is one massive mystery yet to be solved. There are many theories. If we could actually dig a hole and test it, scientist would solve one of the biggest physic mystery ever!!

lol, many fun question can be had by manipulating numbers until infinity

erm,some interesting question again,
regarding big bang theory states that universe is keep expanding, however since speed of light is the fastest,will it possible light travel pass through beyond the expansion of universe?

another question,
is there any exact smallest thing in universe?
e.g (arraging according to size)atom-->proton-->electron-->a->b-->c-->like there is no smallest particle?

as it is now, the string is the smallest in theory

Q: if metabolism is a process that generates/renews cells in our body, why are we ageing anyway?

...1st engineering technology problem, as now, human race doesnt hv such equipment to dig such hole...ie 90 degree straight into another side of earth.

yes, if u can make the tunnel vacuum ... u accelerate to the centre, after bypass the centre, u decelerate and then u reach another end

Q: How'd they get all the ice in a bottled water through that little tiny hole?

This post has been edited by mylife4nerzhul: Jun 25 2009, 07:35 AM

Cells have a built in self destruct mechanism. They stop replicating after a number times.

Damage to the dna can occur due to environmental factors. When the dna is damaged, it is very likely that the resulting cell created from it will not be working as it was originally intended.

that is an interesting one. I've not come across a question regarding the expansion of the universe & light before. Totally clueless

the smallest particle we know of now are quarks. quarks make up atoms.

a theory can't prove anything. models can

our DNA is coded to age, so we're just following orders.

by freezing it after the water is in the bottle ?

The answers is yes


Einstein was the one who said speed of light was the ultimate limit. At speed of light, the relative time with respect to the observer stops and the mass of the object becomes "infinite".
But you see.. you have to go beyond Einstein.



New scientists keep coming out every century or so.

Before Copernicus, Galileo.. the so called "scientists" at that time believed that the Sun revolved around the Earth. Not to mentioned that way before that, the Earth was thought to be flat. Drop that.

But the outlook of the people changed as new scientists come every century and prove new theories.

It is very hard to convince people.
For instance, before Wrights brothers, flying was an impossibility. Going to space or other planets was thought to be more than impossible!
Breaking 100km/h barrier was again impossible

Every century, we break new limits and bring totally new theories

Newton thought "time is like an arrow.. from start to the end, everything is predetermined"

Then Einstein came later and said "time is like a river.. can slow down.. can speed up.. and can fork"


Einstein is the scientist of the 20th century.

Who is coming after Einstein with a whole new concept?

Who is coming 5000 years from now with a totally new concept that breaks every physics law stated in every textbook written today??

Every theory has limits. Einsteinium theory breaks Newtonian limits.


Going beyond speed of light is impossible up to Einsteinium Law. But what's after Einstein?



The point is... don't simply say impossible.
Your great grand children could probably be laughing at you in the future for saying now that speed of light is the ultimate speed

This post has been edited by prolog: Jun 29 2009, 04:22 PM

Why do we dream? What is the soul?

This post has been edited by Deadlocks: Jul 2 2009, 04:45 AM

It can't. The compressibility of water is a function of pressure and temperature as the pressure is increased the compressibility decreases. . At 0 °C in the limit of zero pressure the compressibility. The low compressibility of water in particular, leads to it often being assumed as incompressible.

i remember watching discovery science about this.its possible to go to anywhere on earth on 40 mins by underground train.digging a hole at one point through the earth and the next hole on the other side can be at any point on earth.time taken to travel to anywher around earth will still be 40 mins.the tunnel is vacuum so the train wont lose momentum due to air friction.but in reality its still impossible to execute this

Nope..
The core is the densest part. At the center of the core, you would feel weightless.
But there would be enough momentum to overshoot the center point.
You would stop start decelerating as soon as you've passed the center point of the sphere.


You would swing back and forth like a pendulum..
Assuming no friction (no air), it would be an endless swing.

Assuming friction, you would be brought to rest after some time at the core..
Since earth is covered by atmosphere, there would indeed be friction.
Moon has no atmosphere. So it would be a complete vacuum on the moon.




To understand the concept, try attaching an iron ball at the end of a long thread and swinging it. This is only from my A-Levels physics knowledge (I took in 2004)








ps:

It's just a common sense
Why everone cannot answer this?
It is not unsolved like some people claimed

By the way, the Earth's inner core is liquid.
It is impossible to dig a hole.

But it might be possible on our moon and other planets

This post has been edited by prolog: Jul 12 2009, 01:33 PM

Funny... No one puts quotations for what they say wan... For this question, check this out-
Water State in Space

I like this topic.. And I found 3 questions to answer so far that intrigued me.

To answer your question simply.. NO, water will not have a lower freezing point at lower pressure. But it will have a lower freezing point at HIGHER pressure. Boiling and Freezing are in fact 2 states of matter.. gas and solid. So To turn something into gas we need less pressure(or increased energy to loosen the bonds) and to turn something solid we would need more pressure(or reduced the energy to compact them together). Under extreme low pressure bonds between molecules are more easily severed(loosened) allowing them to move around more[GAS], and under extreme high pressure space between molecules decrease not allowing them to move much[SOLID]

I hope my explanation was clear. I'm not a very good teacher..haha

2nd Question was
I might not be able to answer your question but I will tell you something quite related to what you were asking. You mentioned the word "fall" in your question. Now falling is the pull of gravity on a certain object, and gravity is actually the space on which an object with mass has distorted. So in theory if you could dig to the center of the earth, you would not be able to dig back out. Gravitational pull increases as you reach the center, and lets assume you dont get crushed, you wouldnt be able to dig out because you would have to use force > gravity.

Another answer not constructed very well. =P
CLICKME Just to add a little extra fun to this topic. See where you end up if you dig from your own backyard. (Malaysians end up in Peru)


Last Question was
Why are we aging? Lets see if I can explain this..
When we are born, we are not born perfect. Our DNA is not perfect. We are born with flaws, tiny flaws that we dont see when we are young, but each time our cells regenerate we make a copy from the already flawed design, and as times goes by and the process repeats countless number of times we are able to see those flaws more clearly. That, in essence is what we call aging. Here's an example, take an original printed copy of a book, photocopy it(1), then photocopy(2) the photocopy(1), and photocopy(3) the photocopy(2), and repeat. What you will get is a blur. And that is what happens to our cells as well, only difference is that we have a much better quality photocopier machine.
But also take note, that not all of our cells renew themselves, and those cells are subject to wear and tear, so they deteriorate.


I had fun replying to this post. But I dont really have any questions yet. I'll be back as soon as I have any ^^

This post has been edited by Mesosmagnet: Aug 26 2009, 06:17 PM