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Man, I slept like a log. I do remember hearing quite a bit of thundering and showering during the night and throughout the morning. Didn't matter to me much, I wasn't going to walk to school during a thundershower.
So it's a bit later in the day than I had expected. Brought my camera along just incase I bump into JI, and I've just been warned by KNZ that he's upgraded his camera since last we met..
Got the barfridge from Dusty who was kind enough to drive it to my place. The fridge was pluged in, and some of our stuff was hastily shoved into the tiny box in the hopes that most of our food will be preserved for a few more days. I checked it out this morning, and it seems as if everything is going fine, the Eggo waffles are somewhat frozen, the maple syrup is cold, and the butter was soft. (I left the butter in the broken fridge.)
Oh yeah, I didn't get sick last night so I guess the syrup (and the rest of my food) was okay. To answer MJO's question, the syrup wasn't cloudy, nor were there little strands of.. stuff in it (which happened to some syrup I had once and I got sick - more probably because I thought I was going to be sick rather than actually getting physically sick.
To answer Laz's observation that water beads up on the car windows. You should remember that car windows (and the rest of the car) are usually coated with a wax or similar substance to force the water to clump up into tiny droplets so that they would easilly roll off the window (or the rest of the car, you don't want water sitting around to long if you don't want rust). If you examine the front windshield of the care closely, you can see that the water in the areas where the windshield wipers do not go over tend to clump together. However, the water on the parts of the windshield where the wipers actually do traverse tends to be runny, and doesn't clump together. That's because the wipers have scraped off the wax over time, and exposed the glass underneath. (Many years of careful study went into this - yes, yes, I was a bored little child.)
Also, the water may not actually flow out of the bottle and all around the glass (if it were opened) because by then, the cohesive forces may be strong enough to win over the adhesive forces. Finally, if one does throw water against the wall of the space shuttle, it does not necessarily mean that the water will spread against the wall. Depends on how adhesive the water is to the wall. If they wax the walls (for example) the water should be repelled, or at least ball up when it does hit the wall.
Anyway, I have some club stuff to attend to and another question from Science Teasers to pose. This should be a quick and easy one:
Floating Teaser:
Which is heavier: a full cup of water with a piece of wood floating in it, or a full cup of water without the wood?
Enjoy!
The sun shines and I'm amazed that it's turned into a beautiful day! I don't know where all the clouds went but it's a hot, hazy, and humid day out there now. Great time to go to the beach or something. Anyway, got most of the club stuff done. I have this nagging feeling that I forgot something but..
Oh well, the show setup is in an hour or so so I think I should see how much work I can get done until then.
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I have been informed that I should go and pick up the AV key despite the fact that I'm not a grad student anymore. Hmm. Will this work? Probably. Is it wise? Maybe. Is it necessary? That's relative. Do I care? Not really. Why am I talking about it? For posterity.
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Look at the can of worms I opened. I think it's time to answer this question. I'll only quote the last part of the solution (the first part deals with an experiment you can do):
As you can see, putting the wood in the full cup of water does not make the cup heavier. The wood and water it displaces are equal in weight. That's why the wood floats.
So this time both MJO and Growly are right! Congratulations! I thought this question would be easy after the solution to the first question I posed a couple of days ago. Anyway, I'll pose the next question on Monday, so those of you who don't usually surf on the weekends won't be left out of this science-fest.
Just stepped out of the show for an hour or so to update this page and.. that's about it I guess. JI didn't show up, so I never got around to using my camera. We were delayed by fifteen minutes because one of the fluorescent bulbs blew up and scattered glass over the area where our AV equipment was supposed to go (we waited a while for plant-ops to clean it up before cleaning it up ourselves). No, no.. it didn't blow up while we were there, it was already all over the area by the time we got there. We were actually able to find most of the pieces for the plastic cover for the light fixture and I tried to put it back together to see if it was an accident or if someone deliberatly threw something up there to knock it down. Our results were inconclusive (at least I had no idea). But it was something to pass the time.
Geez, there's quite a bit of lightning up there in the sky. It hasn't started raining yet and I can't hear the thunder, but it's only a matter of time before the storm hits us. What a crazy week it's been for rain.
Been perusing the journals, and I see that Laz has a Counter-Strike story up. I might as well relate a story of my own, although mine isn't as heroic (I was there personally when he was the last terrorist on 747 and wiped out three cts single-handedly). I've learned to attack when people are reloading, and I've learned to aim for the head. What I have learned the most is that the sniper-rifle is king in dust. As a counter-terrorist, I usually got an MP5 and rushed into this killing zone to hold off the terrorists from rushing into our area and bombing one of our two targets. This failed quite miserably. Our team members were okay, but we were uncoordinated, and poorly equiped. After a few aggravating deaths, I went all out and bought myself an Arctic Warfare Sniper Rifle. I planted myself on one end of the entrances that allowed me to look across the entire building and waited. I'm glad friendly fire was off, because I could see through my scope the wave of people congragating in the killing zone. Wasting no time, I let a bullet fly. One terrorist fell. Another bullet. Another terrorist dies. Soon, more terrorists tried rushing through, and while some of my men were holding them off, one of my bullets passed through a teammate and takes down two more terrorists. It was a shooting gallery, and I went from four kills to nineteen kills in three frames. By then, they had learned their lesson and stopped rushing the killing zone.
Man that was a confidence booster, one of these days though, I'll see if I can pull a Laz..
Sparky's been busy as well, with a little story about her day at work and some Tonyisms. (Hmm.. Tonyism.) Anyway, on the way back to the office from the show, I ended up walking behind these two girls. One of them glanced back to see who was following them (I wasn't following! Honest!) but I didn't recognize her. The other girl I didn't really pay attention to until she held the door open for me. I had already headed towards the other door, but I thought she might look like.. er.. that girl I have a crush on. I should've double checked because it's going to bother me for a while. How come when you start getting intersted in someone you tend ot see that person everywhere you go? Or at least you think you see that person everywhere you go.
Well, actually.. no. Not every girl. Most though. There are some who.. I probably know so well that it's hard for me to mistake someone else for that person. I'm not going to say who tho.
Time for me to head back. It still looks ominous out there, but usually I get a ride. Till tomorrow!
Friday, May 12, 2000 at 16:57:57 (UTC)
No wood, silly. Both are "full" so assume the same volume of (water+wood). Since the wood is "floating" it has a lower density, that is mass per volume. Therefore the cup's better off without the wood there. Probably tastes better too.
FlyingS<e-mail>
Friday, May 12, 2000 at 19:25:11 (UTC)
I agree with darcy - the cup without wood is heavier.
The thing that tripped me up was that there is less water involved in the wood+water case (if we assume that by "full cup of water" means full to the brim).
Dr. Hwanalytic
Friday, May 12, 2000 at 20:08:56 (UTC)
What!?! That makes no sense! The wood will only displace water equal to its WEIGHT - the rest of the wood will be above water. So the only water cup will have the weight of X ml of water, the cup with wood will have (X-weight of wood) ml of water, PLUS the weight of the wood.
The two cups should weight the same amount, unless the wood is being held under the surface by an outside force!
Mister Man Mikeo
Friday, May 12, 2000 at 20:14:43 (UTC)
*sigh*
doesn't anybody understand Archimedes Principle!?
the water displaced by the wood has to be of equal weight to the wood if the block is floating, according to the Principle.
Thus, they WEIGH THE SAME in both circumstances.
The volumes have nothing to do with it, since the wood is of unknown shape!
Reg of Samos<e-mail>
Friday, May 12, 2000 at 20:32:04 (UTC)
Mikeo - if the piece of wood is fully submerged (but floating), would you then agree that the wood+water combination is less than the all_water combination?
By "floating in the water", I thought it was fully submerged...
I suppose if it's floating on the surface of the water, then yeah.. the weight should be the same.
Dr. Hwanalytic
Friday, May 12, 2000 at 21:02:40 (UTC)
I think Hwanalytic should be stripped of his doctorate!
Even if the volumes before and after are the same, the amount of water displaced STILL has to be the same weight as the wood. Total weight is the same!
to demonstrate why "density" is irrelevant to things floating or not: take a piece of plywood and place it in water edge-first... that is, don't place it in the water like a raft, but rather as a knife cuts a cake.
See if it doesn't freakin' sink until the whole board is submerged (and no further). By contrast, the "raft" shaped piece of wood will barely sink at all, since its cross section is so much larger.
Reg of Samos<e-mail>