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20 Really Random Facts [Pic]

Hits: 10936 | Rating: (3.1) | Category: Weird | Added by: kitteh9lives
Page: 1 2 Next >   Jump to: Bottom    Last Post
5Cats
Male, 50-59, Canada
 25847 Posts
Friday, June 14, 2013 8:38:11 PM
@Kain1 Nope! Not trolling.
In a vacuum, yes. BUT light is affected by gravity. And gravity is affected by density. And the speed light travels at does vary according to the medium (usually a vacuum of course).

My problem with the "gains mass" idea is that this would require easily changing energy into matter and then BACK, easily! Bzzt!

I think it's easier to change the speed of light (via density) than to convert mass & energy around. Just like I can "move the moon" eh?

The Energy increases, the Mass stays the same so the Speed of Light (squared) is INCREASED to keep it balanced...


I did get it "arse backwards" in my explanation below, it <increases> due to more density (gravitic effects). SPEEDS UP in a "relative way" eh?
Again, it's such a tiny number it's incomprehensibly small!

Kain1
Male, 18-29, Europe
 1463 Posts
Friday, June 14, 2013 7:25:03 PM
Unless of course you're just trolling.. in which case, joke's on me.. tee hee..

Kain1
Male, 18-29, Europe
 1463 Posts
Friday, June 14, 2013 7:24:40 PM
The falling book thing should have read:
"bla bla bla.. (assuming a perfect vacuum)"..
In a perfect vacuum, it's about 42 minutes to fall through the earth to the other side, only by the influence of gravity. Drag messes up all the beautiful math. Stop ruining the cool physics !..

5Cats: The entire theory of relativity is based on the assumption that the speed of light in a vacuum is a universal constant, and does not depend at all on how you're moving through the universe, or what kind of field you're in. So no, the speed of light doesn't change.. therefore, the mass must.

If you compress a spring, you add potential energy to it by distorting the molecular bonds away from their ground state. when you release it, it jumps up, because the molecular bonds go back into their original configuration. This stored potential energy is still real energy, and still factors into the E = m*c^2 equation..

ferdyfred
Male, 40-49, Europe
 11341 Posts
Friday, June 14, 2013 3:23:12 PM
Far too many people here asking google questions

5Cats
Male, 50-59, Canada
 25847 Posts
Friday, June 14, 2013 1:49:29 PM
E=MC^2

The Energy increases, the Mass stays the same so the Speed of Light (squared) is reduced to keep it balanced...

The higher density alters the fabric of space/time which slows light (in that RELATIVE way, eh?).

5Cats
Male, 50-59, Canada
 25847 Posts
Friday, June 14, 2013 1:47:10 PM
I think (but have not looked it up) that when you compress the spring you change it's DENSITY: the same mass is now in a (slightly) smaller volume. I mean the walls of the spring itself get smaller, not just the spring "getting shorter" eh?
More density = greater distortion in the space/time field which affects... the speed of light! After all, it's not a "constant" it's subject to various variables, including dents in the fabric of space-time.
Again, it's literally impossible to measure as it is such a TINY number.

Just like when you move a 10 pound weight you've moved the Moon. You can calculate it... but never measure anything THAT small! Not to mention 1,000 other unknown variables...

freddyferret
Male, 40-49, Midwest US
 11734 Posts
Friday, June 14, 2013 12:32:17 PM
@Lednar - it depends on whether you're using the long scale or short scale. Either one is correct, it's dependent upon the scale being used. Using the short scale, your version of one trillion is called a quintillion.

Get your facts straight and shove the 'murica bullpoo up your wanker ass.

richanddead
Male, 18-29, Eastern US
 1961 Posts
Friday, June 14, 2013 10:00:30 AM
@Gerry1of1: to simplify what @pazerlenis said, because the spring has more potential energy from the force of compression, it makes the mass increases and therefore the weight does as well. It would work the same way if you threw the spring at someone, it would weigh more than if it was still. Or if you said a hot spring weighs more than a cold spring, obviously because hot springs are big.



Lednar
Male, 18-29, Europe
 109 Posts
Friday, June 14, 2013 8:34:18 AM
Here in Europe one billion = 1.000.000.000.000
and one trillion = 1.000.000.000.000.000.000

Sometimes I think 'muricans use those words because they just sound fancy.

pazerlenis
Male, 40-49, Western US
 987 Posts
Friday, June 14, 2013 6:57:05 AM
"How can a spring weigh more when compressed."

A compressed spring does have a bit more mass due to stored energy. HOWEVER. the amount is so small you could never measure it.

Say: 1000 J = 1000 kg*m^2/s^2
E = Mc^2
1000 = M * (3 * 10^8)^2
10^3 = m * 9 * 10^16
M = 1 * 10^3/9* 10^16 = 0.11 * 10^-13 kg = 0.00000000000001 kg

I did not just copy/paste that from yahoo answers...

Gerry1of1
Male, 50-59, Western US
 33910 Posts
Friday, June 14, 2013 6:33:59 AM

How can a spring weigh more when compressed.
You're not counting the weight compressing it, just the spring itself. ... I don't recon that one.

wiscesq
Male, 30-39, Midwest US
 87 Posts
Friday, June 14, 2013 6:07:56 AM
I'm pretty sure you couldn't actually dig a hole to the center of the earth. I think at some point, long before you reached the center, the pressure would be so great that you simply could not keep any kind of hole open no matter what materials or engineering design you used.

Essersmith
Male, 18-29, Europe
 273 Posts
Friday, June 14, 2013 5:52:50 AM
@Pumba not to mention crushed... and so would the poor lad digging the hole.

Essersmith
Male, 18-29, Europe
 273 Posts
Friday, June 14, 2013 5:49:11 AM
@zep

"Lets think bigger: if you dug a hole to the center of the Earth and dropped a book Down, it would take 45 mins to Reach the bottom:"

Well if you want to be technical, its not stated where exactly this bottom is.
The gravitational pull also varies depending on Your distance from the Source.
So even if we were at the bottom of this hole, its unlikely that it would take 45 minutes as the gravitational pull would be greater than on the surface.

pumba62
Male, 40-49, Canada
 966 Posts
Friday, June 14, 2013 5:47:12 AM
All the calculations for the falling book are incorrect ! It would catch fir long before it reached the bottom

Wendypants
Female, 30-39, Canada
 2098 Posts
Friday, June 14, 2013 5:04:51 AM
In reference to the moon/ocean floor thing...
that's why it bugs me when I hear that space is 'the final frontier' (despite being a Star Trek fan) ... nope, we still haven't fully explored the oceans yet. AFTER that it's space.

zeplin4u
Male, 40-49, Eastern US
 72 Posts
Friday, June 14, 2013 4:42:33 AM
You all need to reread the fact, it says; "if you dig a hole to the center of the Earth", OK, so now you are at the center of the Earth, it will now take that book 45 min to fall to your feet.

Essersmith
Male, 18-29, Europe
 273 Posts
Friday, June 14, 2013 3:03:07 AM
The growing mass that it has passed, and the gravitational pull that it would cause, would likely be miniscule as the main pull comes from the dense inner core. Its very likely that it would have an effect on the books velocity but unlikely that it would actually change the result greatly.. much less change it to 45minutes.

Essersmith
Male, 18-29, Europe
 273 Posts
Friday, June 14, 2013 2:56:19 AM
@Cory and Wibble.

A very quick calculation sets the random fact to be quite off.

The average radius of Earth is about 6371 km.
Assuming the terminal velocity of a book is ~200km/hour the same as any given Object without effecient friction reducing facilities.

6370000m/200000m/hr = 31.9hr =1.3 days

Assumptions: 15 Seconds to Reach terminal velocity not taken into consideration but this would add time not reduce.
Variance in air friction not taken into consideration but this would likely slow it Down further.


wibble4321
Male, 30-39, Asia
 332 Posts
Friday, June 14, 2013 2:25:06 AM
Corydoras, sorry, no. As it sinks below the surface of the earth there is increasingly mass above it. The mass of the earth above the book begins to apply an increasingly strong gravitational pull in the opposite direction. At the centre of the earth there is no gravity (caused by the Earth) because the mass of the Earth is evenly distributed all around the centre pulling equally. Gravity is not a single localised 'thing' an object doesn't have one spot where gravity exists - gravitational pull is exerted by everything that has mass.

Re-reading your text I wonder if you have not taken into account terminal velocity? The book has a drag coefficient that slows it - it cannot reach that speed. It will initially accelerate a 9.81m/s2 until the drag overcomes the acceleration.

Corydoras87
Male, 18-29, Europe
 638 Posts
Friday, June 14, 2013 2:10:50 AM
wibble4321, you got it wrong, it would not take that long, in fact, it would still increase in speed until it reached the center, just this increase would be lower and lower the closer to the center it is. On the earths surface an object drops with around 10 meters/s². As it reaches more and more depth, the part of the earth that it has passed starts pulling more and more on it, reducing the rate in which the speed of the item increases, but it will only ever start slowing down when the book reaches the center of gravity (and would continue to fall to the other side of the earth). Think of it like a linear pendulum

wibble4321
Male, 30-39, Asia
 332 Posts
Friday, June 14, 2013 12:43:15 AM
Fun facts. Number 5 is a little off base however. If the book took 45 minutes to 'fall' to the centre of the Earth, it would have to be travelling at an average of approximately 5200 miles per hour, which would be impossible. In reality it would take a huge amount of time to fall, as the closer you get to the centre of the Earth, the smaller gravity becomes until you reach the centre where it is zero. The book (or any object) will therefore continue to slow due to air resistance all the way to the centre. It would take an inordinately long time for any object to fall to the centre.

Squrlz4Sale
Male, 40-49, Eastern US
 6018 Posts
Friday, June 14, 2013 12:17:51 AM
@ Ollie: Thanks, Ollie. I was hoping you'd explained the spring thing in a way I could understand--and sure enough you did. =^.^=

drawman61
Male, 50-59, Europe
 6099 Posts
Thursday, June 13, 2013 11:47:11 PM
We know more about the moon than we do about the ocean floor. Yeah, and we've been there just as often, too. That's sarcasm for never.

carmium
Female, 50-59, Canada
 6406 Posts
Thursday, June 13, 2013 11:14:49 PM
I wonder where you buy a full-size model whale heart...

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