November 14
What is a Dye Front?
I'm working on a PCR and I need to divide the distance of the bands that I have by the Dye Front, but our teacher never explained what this looks like. Can someone give an explanation or a diagram? Thanks. M@$+ @ Ju ~ ♠ 00:29, 14 November 2007 (UTC)
labrador coat
Is it normal for a labrador puppy to have a thickest fur along its "back"? (My dog-related English speaking is not the best, I hope you understand it anyway). Thanks in advance. 217.129.241.186 00:30, 14 November 2007 (UTC)
Chemtrail Crazies, why is the bandwagon so big?
In my opinion the whole chemtrail phenomenon is a load of bollox. From what I've seen from online research is that those who believe in chemtrails piece together unrelated elements onto a big illogical ball of *cough*. I don't know of anyone on MCAGCC 29 Palms running around with black lung desise and their hedaches are from working with the Marine Corps or PTSD. What I want to know is how people hear these illogical reffrences to contrails being poison and then they fall for it the second they hear about it? Is it that people in general are just that gullible or the bandwagon effect at it's best, because thats all I can think of. This may seem like a nonsensical rant but I have a friend who claims the government is out to get us all and everyone seems to believe him when he mentions chemtrails.
Polystyrene cups
What are the effects from drinking hot beverages out of Polystyrene cups? Zain Ebrahim 09:13, 14 November 2007 (UTC)
chemicel contents of ferro titanium
i would like to know the chemical contents of ferro titanium.if the compound has silica 3.64%,iron (fe2o3) 35.25%,titanium(tio2) 48%,mangansese 2.55%,tungsten(w)6.09%,molybdenum 2%,carbon 0.79%,alumina 1.93% and its bulk density is 2.476% what is this material called.
Help on the Antlion
Please help?
I'd like to know how to go about answering the below mentioned challenge copy 1 vs copy 2 presented to 3-12 year olds
Copy 1.I also challenge you to find a sticky substance in an antlions hole. The antlion is the larvae. The struggles of the ant to get out of the hole cause the dry sand to slide down trapping the ant. The antlion flicks sand up from below with it's pincers until the ant is within reach and it can grab the ant. Anything sticky would cause the sand granules to stick together making the antlions hole useless.
Copy 2.The Antlion Antlions think ants are so delicious, they spend their whole lives building sneaky traps in dry sunny soil for ants to fall into. They even live in these traps - and can dig one in just 15 minutes! They then prepare a gooey, sticky substance called Larvae, and wait for some unlucky ant to fall in! When the gooey Larvae traps the ants in the hole the antlion get very happy and say "yummy, a fine breakfast is served!"Any help in this regard would be much appreciated
Confused!÷
Plasma rockets
If the rocket shoots out plasma instead of fire, will it go faster? 64.236.121.129 18:04, 14 November 2007 (UTC)
Just a guess: plasma is an electrically neutral collection of charged particles. You would have to separate the charges and accelerate them out of the rocket. IT seems that since the energy of the escaping particle depends on the variable electrical field and not the fixed chemical energy of combustion, the velocity could be faster. You would have to alternate charges being expelled.
Gold Detecting
Would gold show up on a metal detector? What kinds of metals show up?
Is it possible for gold to come grow back (I know its not like a tree) but be created again from the place it was taken. If the same elements that created it the first time could create it again, or once it is taken and the place picked dry gold remains gone from that place forever?
I had never heard of stars creating gold before, that is very interesting. Just curious, how does that work, where does the gold go?
Dried Banana Chips
Do dried banana chips still contain high level of potassium similar to fresh bananas?84.66.175.242 19:23, 14 November 2007 (UTC)
Why don't they make bullets out of steel instead of lead/tungstun?
What advantages does lead have over steel bullets? 64.236.121.129 20:01, 14 November 2007 (UTC)
BTW, the article sucks but there are Spearguns meant to shoot through water. But, it's quite different than a bullet. Friday (talk) 20:35, 14 November 2007 (UTC)
You have the right idea in theory, but there are several reasons why a 100% steel bullet is not a good idea. First, remember that the barrel of your weapon is likely steel as well, so the rifling grooves are not going to "bite" into the bullet as well as they would a lead or copper-jacketed one, since the grooves and the projectile are of about equal hardness. The bullet will be spun up somewhat, but not as much as is usually desirable. Along similar lines, the bullet will also wear on the grooves alot more, thus reducing their ability to bite. This is the reason you use a bronze brush when cleaning a weapon, and not a steel one... the steel brush will erode the inside of the barrel.
Now, that said, note that a common NATO bullet, the M995 Ball, uses a hard core (steel originally, tungsten now), surrounded by lead, and copper jacketed. This is the best of both worlds: soft outer parts for maximum effectiveness in the barrel with minimal erosion, followed by a very hard core which will penetrate body armor up to certain levels. Arakunem 15:25, 15 November 2007 (UTC)
Mystery of the freezing water
A few years ago in a trip to Norway early one morning, my friends and I were about to get on the road with our car. The temperature was about 0 degrees celsius or maybe below, and we found that we'd left two glass bottles with some water in the car overnight. Picking up the (sealed) bottles for taking a sip, we saw the water freeze and turn into ice in just an instant. Can anyone please explain this? Gil_mo 21:25, 14 November 2007 (UTC)
Levitating at the center of the world
There's a well in my backyard. It's lined with a material that makes it almost impervious to heat and pressure. (Pretty amazing stuff!) The well is so deep it actually runs straight through the center of the world and connects up both Antipodes. Yesterday my poor cat Mr. Cuddlypants accidently fell into the well. Am I safe to assume Mr. Cuddlypants is now levitating at the center of the world? Sappysap 22:04, 14 November 2007 (UTC)
With a name like "Mr. Cuddlypants", I suspect it isn't so much that he fell into the well, so much as he jumped . --Mdwyer 01:37, 15 November 2007 (UTC)
Maybe it’s time to play with some actual numbers:
The barometric formula says that the density of the air in the well will equal the density of liquid air at a depth of only about 55km. So the air in the well is all liquid except for about the top 55km of gaseous air! That’s only a rough approximation though, mainly due to the ideal gas law becoming increasingly inaccurate as the density approaches that of liquid air.
I’ll assume Mr. Cuddlypants’ terminal velocity in air at the surface is roughly that of a skydiver in free fall, which is about 54 m/s. Given the equation for terminal velocity, and given that the density of liquid air is about 710 times greater than air at the surface, that means that Mr. Cuddlypants’ terminal velocity at about 55km down is already down to only about 2 m/s. It’s safe to say that Mr. Cuddlypants is nowhere near the center of the earth yet.
Assuming that the earth’s density is uniform (not a great assumption), the gravitational force inside the earth is proportional to the distance from the center of the earth. The radius of the earth is about 6371km. Combining that information with the equation for terminal velocity says that Mr. Cuddlypants' terminal velocity wil
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