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Questions answered by robdashu  USA   (Expert Rank: 109) Member has an expert rating of 100+
 

The earth and other planets where formed from leftover matter stuck in our suns orbit. I'm just wondering if having an earth twice the size as ours now would be more beneficial to the complexity of life or worse? Like the more diversity there is the higher the complexity can get so earths wide diversity plays a huge roll in how we got to where we are now so what we could do with a planet twice as large would be astonishing if we could adapt to the extra gravity. If we where going to look for other life on different planets what stars would be the best to look at? Our sun is perfect for our planet but would a bigger sun possibly with the right conditions possibly host an even more complex life form? Because if are sun caught this much matter in it's orbit then an even bigger sun definitely would have caught more matter. Any thoughts about this topic right or wrong would help thanks?

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Question found in Science In General
Your thought experiment cannot be completed without making further assumptions. If I were to assume, for instance, that the increased gravity of larger systems caused limitations on the design variations that worked for mobility, I would think there would be less diversity.

You ask some interesting questions, but they are mostly unanswerable either because of the way you have framed them, or because the answers are not agreed by cosmologists.

Another for instance: if you start asking about quantum mechanics, you better know higher [WAY higher] math if you really want to get an understanding of it. The more advanced constructs in physics and astronomy do not lend themselves to easy conceptualization using the English language - the language of math is required for complete accuracy and understanding.

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Thanks that helps alot

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When sea level is measured is displacement caused by sea going vessels or sunken vessels taken into account?

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Question found in Science In General
I recently heard on Discovery or somewhere else relatively reliable that the volume of water in earth's oceans is equal to the volume of earth's moon.

That makes the displacement of ships so small as to be immaterial, probably smaller than our measurement uncertainty.

We used to call that "bugdust"!

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Puzzling thing that all matter isn't in a sphere around an empty origin where all matter was made, I mean if their was 1 big creation of matter then it would be in a clump right and if this energy that's moving it apart separated this matter it would move in clumps kind away from this origin but would move in every direction away from this spot and would leave a place with no matter is left. So how do we have evenly distributed matter across the universe? I don't know but maybe all the matter wasn't created all in one bang it's pretty easy to suggest this it gives you an easy thing to work with in a sense but not a really plausible idea this could have built up gradually.

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Question found in Science In General
One of the theories that was at one time in competition with the big-bang theory was based on the idea of continuous creation of matter at the center of the universe and the idea that something was being created there from unknown sources. I don't believe this has many followers as it doesn't agree with other theories that have more physical evidence - or at least are more coherent, encompassing theories.

The big-bang does seem to imply that some central point would show a lack of mass density because everything was ejected away from that point. It could certainly be argued that as the mass expanded and differentiated, that parts would take on characteristics that would cause their velocity to vary from other parts, therefore explaining the lack of an obvious "smoke ring" effect. There would be a dispersion of the matter through varying rates of speed.

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Like posibly the the matter is sourounded by this dark energy and is creating currents in space so our universe is almost like a liquid ball expanding outwords

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So I read that artical that said all the matter we know of is only 5% of what's out their the other is dark energy. Is that energy done creating matter?

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Question found in Science In General
Joe:

To say that space has no relevance without time and matter is a rather complex statement. I presume you mean that there is no way to measure one without the other - e.g. you can't measure time with using spatial displacement or some similar phenomenon like radioactive decay.

But that's rather like the question of whether the tree falling in the forest makes a sound when no one is there to hear it. Isn't it?

Rob

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When a star is dying it burns up the last of the last of the matter that's sustaining it so it colapses into itself exploding into whatever you want to call it depending on the size of the star right? And I'm guessing since a black hole has a greater gravitational pull then a star it has more matter in it just we can't see it because everything that goes into it dosent come out even light right? So my question for you is if everyones going with the big bang theory what caused the bang because as far as I know since the most matter in one place that we know of becomes a black hole then wouldnt the big bang theory be one huge Black hole? Just a guess but if you had that super massive black hole and it really sucked in everything into it matter and space and it had nothing else to pull in that gravitational force could somehow reverse itself. Sorry for the question I'm 16 and really have alot on my mind if you could clear things up for me that would be great thanks.

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Question found in Science In General
I'm not an expert.

But, I believe that when the amount of matter in a black hole reaches a certain point, the density of the matter can get no greater, and a "rebound effect" of some sort occurs. It may have to do with "weak" nuclear forces or something. When you get the matter packed that densely, new forces become stronger than the gravitational pull of the black hole, and cause it to reverse direction with a big bang!

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Dear sir or madam, on my loptop a message pops up from time to time. It says, your system is low on virtual memory. Windows is increasing the size of your virtual memory paging file. What does this mean and shouldIi be worried? Many thanks Sammy.

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Question found in Computers For Beginners
Not to worry - it's only informational.

It means that your computer is limited in how much it can perform at once by the amount of memory (RAM) that your computer has. Newer operating systems operate better with larger memory amount. One Megabute of RAM will usually suffice.

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I have recently bought a Chinese 125cc called a Haotian vixen125. When I look underneath it I see there are 2 tubes that don't lead anywhere they're just hollow tubes that look out of place. My last Chinese bike was a 50cc Yiying and I remember seeing the same thing with that. Is this a problem or not?

liambetney@hotmail.co.uk

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Question found in Motorcycles
Don't know for sure; could be something like battery overflow tubes so acid won't get on the bike if the battery overheats.

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Why cant a big bird like an ostrich fly?

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Question found in Science In General
As an animal increases in size, it's mass increases with it; the mass increases exponentially as the cube of the length. (Have patience: the bird answer is toward the end.)

. If we think of an animal in as an idealized square or round object (which we can easily calculate the volume of) and the legs (supports as columns (for the same reason), we can see what's going on.

- mass is proportional to (length) cubed

- the cross-sectional area of the support determines it's strength

- this cross-sectional area of the column increases in an exponential fashion also, but in this case, proportional to the square of the length

Area = (pi) (radius) squared

So, the mass increases as the cube of the length, whereas the strength of it's supports increases only as the square of the length.

Similarly with the issue of flight. Lift is proportional to surface area of the wing. The surface area increases with the square of the length, as does the cross-sectional area in the example above (Somehow the support example seems more intuitive.)

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Are there any business's that thrive in times of a recession, and if so, why is this?

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Question found in Business & Economy In General
Any service industry that extends the life of an asset that has a significant cost:
for example:

Shoe repair
Appliance repair
Auto repair
computer repair

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I have a time computer, bought it just before they went bust. I am still getting a logo on startup saying time registration. It will not go off till I click on later. help mally

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Question found in Computers In General
You can go to the System Configuration Utility in Windows (see windows help), and turn on or off the loading of services and startup programs when the computer is started. All you have to do is figure out which one of the programs or services performs this time function.

good luck

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thanks ever so much i have been fed up of this logo for almost 2 years your a god send thanks malcolm. and merry xmas.

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