insane_alien

in the ideal case of a perfect newtonian fluid then yes, exherting an infinite pressure will cause an infinite flow. in reality you'll run into all sorts of problems that prevent this occuring. fusion, collapse into a black hole etc. etc.

what happened to Radon? and why did we get so crap with naming elements?

whether or not that is the case it answers no questions.

i'm talking about all isotopes. they can all be formed naturally as a result of natural nuclear reactions. I don't follow about the pressures. or your maths. 8 cubed is 512 not 64. what units do the pressures have? why are they octaves? where the hell does tones come in? what happened to the definition of a chemical element by the number of protons? you know something that actually makes a difference to the chemical properties? why would xenon help tissue regeneration? it is chemically inert. i guess my point with the proton drive was more that 'this technology already exists so how can it be a future invention?'

Your proton drive also sounds a hell of a lot like our current ion drives. different reaction mass fair enough but essentially the same.

what is your definition of 'isotope'? it doesn't seem to match our current definition as there are way more than 49 isotopes known. (roughly 3000 currently but only 905 have half lives longer than 1 hour also you appear to use 2 definitions of 'element' there. please clarify.

no, these are often, but by no means always equivalent. temperature plays a huge role.

air is denser at lower altitudes. gavity does affect the trajectory of air particles. this isn't noticable down here because they tend to hit off other particles in a very short distance. soundwaves aren't because they have no mass.

well, the thing going wrong is that you are using ping flooding which pretty damn silly and usually ineffectual and probably comes under some computer misuse or other. there are numerous ways to defend against ping flooding, the most common method is to simply ignore the ping packets (especially if they are from outside the local network. but then again, 1000 packets isn't so much. anything other than dial-up would be able to absorb the load with relative ease. infact as it is a server it probably means it hasa far better internet connection than you do which means you'll never be able to DOS attack it like that. stop being a script kiddy. nobody likes them.

no, maximum particle velocity would not be 340 m/s you could still build a gun that has a muzzle velocity of 900m/s and fire it. from the bats perception the bullet arrived before the gun was fired but this is not actually the case. and you can't exclude light even if it can't be percieved. it is still there, photons are still exchanged and are required for there to be matter.

its baloney. there are other threads on this use the search function.

see, thats some of the information you do store. you might not know you've stored it though which hypnosis can help with(but it doesn't always work). but you couldn't look at a tree and recall the location of every leaf. or which bricks on a wall were discoloured or the distribution of chewing gum on the pavement (sidewalk for the yanks). you would see all these things but your brain wouldn't even begin to try and store them unless you were conciously trying. information like a registration plate or a face is 'important' information to your survival mechanisms so we've evolved to remember stuff like that (well, maybe not the registration plates) because it can be useful. although it is doubtful that this information would have a long retention time unless something else was associated with it.

99% of the information your eye takes in is discarded. the rest of the information is heavily compressed and lossy at that. i imagine it is pretty much the same for your other senses as well. while your brain has a tremendous storage capacity, it is finite. if every detail of sensory experience was permanently stored then you'd be out of room after a few years at the most.

disadvantages would be death. thin about it, if your heart is pumping as slow as possible and your veins are dilated then you have extremely low blood pressure. dangerously low. at the very least you are looking at permanent unconciousness if this pill is somhow permanent.

1. We can kill all other animals on Earth, whenever we want. No animal can kill us, unless it catches us asleep. Or while we're being careless or stupid. Or politically correct. blatantly false. plenty of animals can kill us, plenty of plants, insects and bacteria that can kill us too.

i believe there have been bacteria discovered in deep veins of rock that have been uncovered by deep mines in south africa.

safety margin. the longer a journey, the more likely you will encounter delays

attack of the killer tomatoes.

time = distance/ speed

Ah, yeah, probably wasn't clear in my posts that I was using expiry as date after which it is 'not fresh'. sorry. medicines are easier than foods as it is typically one or two chemicals(active ingredient and an inert filler usually) in a very well sealed package and with plenty of quality control at the manufacturing end. It removes a great deal of the variables found in foods which are more complex and have less rigorous standards.

the important fact to note here is the difference between a calorie and a Calorie. you might notice that foods and drinks the energy content is given in Calories while that definition is for a calorie. it helps to look at the short hand, a calorie is 'cal' and a Calorie is 'kcal' the value on the food is 1000*bigger than the thermochemical calorie. so that pint of water with 1000 thermochemical calories only corresponds to 1 food Calorie. so he'd need to drink 1000 pints of water to get the effect he is looking for.

well of course there are reasons that food expires. bacterial growth, degradation of chemicals within the food etc. The whole problem is that there are so many variables that affect the shelf life that it is almost impossible to predict. In order to get a truly accurate picture you'd have to spend millions on stability trials. and even then, it would be impossible to reduce the data you get from those trials down to something so simple as 'this product will expire in x days' and yes, different foods manufactured in different conditions will have different expiry dates. and even the same foods manufactured in the same conditions can and will have different (exact) expiry dates. and then there is storage. the temperature and humidity can have a massive impact upon how soon a food will become rancid. for a college project you'll probably want to reduce this to one or two variables and a few types of food(as you are probably limited in time you should pick something with a short shelf life). when a food will expire is the million dollar question among food manufacturers.

expiry date is almost never a calculated value. what typically happens is they take a sample of the product (preferably from several batches) and to stability testing. They'll store the product in a variety of conditions and test the quality at set intervals. They'll take the average and put in a safety factor (15% is bandied about a lot) and then whap it on the packaging. so for milk, they'll take maybe 100 bottles, store twenty each in different conditions and then take one bottle from each location every day and test it for 20 days. but then then a michel says, sometimes it's government mandated regardless of reality and sometimes companies will just guess. I wouldn't really call expiry dates calculated, more vague rule of thumb guideline that applies in certain circumstances. I can take any product and make it expire long before the expiry date says it should and i can keep it fresh long after the expiry date says it should have turned to mush. If you can come up with a way to accurately predict expiry dates then many many companies will be willing to pay you lots and lots of money.

again, no. when you seperate the material into its component parts it is no longer that material. for instance, if we take ice, cool it to near absolute zero and split it into solid hydrogen and solid oxygen then melt the hydrogen and oxygen then recombine in a way the product will be solid phase water, you still haven't melted the water, you've melted hydrogen and oxygen, but not water. same applies to composite materials such as wood or cars.

no i wouldn't. the reason being, while those compounds may melt perfectly fine individually, they may not melt fine when together. not only that, but the range of different melting and boiling points is likely to mean that upon recombination you will again end up with a multiphase system. you haven't got a simple melting process there, you have separation, melting, recombination. and again, there are many components of wood that it is impossible to melt as they would not survive the temperatures involved.