Science & Mathematics - 19 June 2006

There are 30 children in a class. 12 of them can play badminton, 8 of them can play table tennis. Find the greatest possible no. of children that can play neither of the 2 games.

2006-06-19 21:34:20 · 19 answers · asked by Anonymous in Mathematics

A water plant grew very fast such that it doubled the area of the water surface that it covered every minute. It was brought to a 100m 50m pond at 11 am. At 12 noon, it managed to cover the entire pond. Find the time when it covered at quarter of the pond.

2006-06-19 21:31:56 · 7 answers · asked by Anonymous in Mathematics

If so, what is a rational explanation for the phenomena? What are some of the theories of the cause?

2006-06-19 21:29:00 · 5 answers · asked by chuche 2 in Other - Science

2006-06-19 21:28:10 · 3 answers · asked by zzzlordcharmyzzz 1 in Mathematics

Just tell me anything.

2006-06-19 21:23:30 · 16 answers · asked by jenn 3 in Weather

2006-06-19 21:17:09 · 25 answers · asked by woot!! 3 in Physics

2006-06-19 21:16:52 · 13 answers · asked by biswaspp 1 in Physics

2006-06-19 21:15:56 · 8 answers · asked by Anonymous in Geography

2006-06-19 21:06:50 · 2 answers · asked by STANLEY G 1 in Mathematics

2006-06-19 21:05:31 · 6 answers · asked by navidoooooo 1 in Geography

2006-06-19 21:05:21 · 4 answers · asked by thinkblue_p 1 in Engineering

2006-06-19 21:03:23 · 8 answers · asked by ankush_wah 1 in Chemistry

organic chemistry

2006-06-19 21:00:09 · 6 answers · asked by messiah 1 in Chemistry

2006-06-19 20:47:16 · 11 answers · asked by DiTz! 1 in Mathematics

what i bought was just $97 so I gave them back $1 each. That means I only owe them $49 each. But when you add up $49 and $49 you come up with $98. I only have $1 left.

Where is the other $1 dollar???

Somebody asked me this but I was dumbfounded with this question. Please help.

2006-06-19 20:42:51 · 22 answers · asked by Rachel H 2 in Mathematics

2006-06-19 20:39:04 · 4 answers · asked by Anonymous in Other - Science

Five tapes cost as much as two CD'S at the Tape and CD exchange. Carla bought four tapes andd two Cd's for 27 dollars. How much does a CD cost?



Can you please explain how you would work this problem out?
and type out all of your work so I can understand it?
And what is an appropiate equation for this problem?

2006-06-19 20:38:58 · 32 answers · asked by cocomademoiselle 5 in Mathematics

2006-06-19 20:33:52 · 11 answers · asked by amrita_dinakar 1 in Engineering

2006-06-19 20:31:17 · 10 answers · asked by ronald m 2 in Other - Science

And if so, do different fish feed different times, because I know the best time to catch catfish is at midnight/ or noon especially if it is raining?

2006-06-19 20:30:38 · 2 answers · asked by careercollegestudent69 4 in Other - Science

I change my dogs water everyday, sometimes twice a day. Tonight I found 3 maggots in her water. She sleeps in the garage at night, and goes to the bathroom on newspaper. Everyday I let her out and clean up the paper, and wash off the spot where the paper was, then put fresh paper down. Every weekend I hose down the entire garage floor and wait for it to dry before I put her back in the garage. (I found one maggot doing that last weekend) Also we don't keep trash in there because she gets into it and tears it up. So the garage is pretty clean.

I just worry that maybe she's sick or something. Maybe there's some type of worms that dogs can get that look like maggots?

2006-06-19 20:28:37 · 9 answers · asked by jakeypants2000 2 in Other - Science

2006-06-19 20:27:31 · 9 answers · asked by Anonymous in Physics

2006-06-19 20:23:24 · 5 answers · asked by amrita_dinakar 1 in Engineering

If the sun were to suddenly vanish, how long would it take for the Earth to stop feeling the sun's graviational pull? Instanteneous? Speed of Light? Somewhere in between?

2006-06-19 20:20:06 · 14 answers · asked by sgissin 2 in Physics

2006-06-19 20:18:12 · 28 answers · asked by orbital 1 in Biology

2006-06-19 20:17:06 · 11 answers · asked by orbital 1 in Biology

MCCONNELL’S POST ON PIANKA:

Dr. Pianka was named the 2006 Distinguished Scientist by the Texas Academy of Science. He’s an ecologist, a “doomsday ecologist” as he puts it, with a CV several pages long and results that have changed the way ecologists think, forever. And damn is he ever entertaining to listen to.

Dr. Pianka’s talk at the TAS meeting was mostly of the problems humans are causing as we rapidly proliferate around the globe. While what he had to say is way too vast to remember it all, moreover to relay it here in this blog, the bulk of his talk was that he’s waiting for the virus that will eventually arise and kill off 90% of human population. In fact, his hope, if you can call it that, is that the ebola virus which attacks humans currently (but only through blood transmission) will mutate with the ebola virus that attacks monkeys airborne to create an airborne ebola virus that attacks humans. He’s a radical thinker, that one! I mean, he’s basically advocating for the death of all but 10% of the current population! And at the risk of sounding just as radical, I think he’s right.

Humans are far too populous. We’ve used up our resources, and we’re destroying the Earth at an accelerated pace. The more technology we create, the more damage we’re capable of doing. We now consider keeping the forest natural to save a species of catepillar more important that using that space for humans to live and till. And I’m in complete agreement with that. It’s the harsh reality that many people alive right now should be dead. And even harsher to think that the world would be better off with them dead too. My grandparents, who I love dearly and am so incredibly thankful to know, are honestly being kept alive only through the technology that we have created via medicine. The same goes for the millions of other old folk alive and kicking and will continue to do so for another 5-10 years, using up more resources. Or think of all the babies being born every hour with abnormalities that 50 years ago would have kept them from living. Now, those lives can be saved, and we pat ourselves on the backs at how smart and charitable we are as a species that we can create and sustain life. For those against cloning, etc because it’s “playing God,” how is this any different?? Life has a built-in mechanism that keeps species from becoming too overpopulated, and it wasn’t until humans started messing with the system that it went out of whack. Now that we’ve killed off the majority of all top predators, we now must take on the duty of keeping populations in check and at the same time, allowing other species a fair chance at reproduction.

It wouldn’t have been so bad 15-20 years ago when we reached that threshold of sustainability if we as humans would have learned to control our population size then. But instead, we saw the Earth’s resources as unlimited and our authority over them exclusive, and we continued to reproduce when we should’ve stop. Dr. Pianka made a very profound comment during his presentation; he said that China has the right idea by limiting reproduction at 1. We’re past the point of replacement reproduction as a species. We’re too many for the number we’re at now! We need to decline in population. A virus is probably the fairest method of extermination (though still not completely fair, I admit) because it’s nondiscriminatory as to whom it targets. Rich, poor, black, white, brown, nice, mean, religious, agnostic - we’d all be targeted equally. The only difference is who can afford medicine and even then, if it’s a mutated virus that strikes fast, humans would have only the tiniest of a chance to find a cure in time so money wouldn’t matter.

It’d be nice if humans could learn to manage our population as successively as we’ve learned to manage the population of literally every other species on this planet with whom we share. We’re very skilled when it comes to killing off deer, snakes, rabbits, and fish for population control. But we’re a stupid species when it comes to managing ourselves. An insightful observation was made during the talk that education should be the key to learning how to take care of the Earth, but the problem is that the educated have fewer children and the uneducated have many children. So eventually, the uneducated will take over the Earth. It may have already happened.

2006-06-19 20:10:27 · 16 answers · asked by lacoste 3 in Earth Sciences & Geology

2006-06-19 20:08:50 · 4 answers · asked by Am 4 in Physics

2006-06-19 20:07:57 · 4 answers · asked by scorpioash19 1 in Biology

The color white is percieved because an object reflects all the visible wavelengths. A mirror does this same thing. How do we percieve them as different? Or am I misinformed?

2006-06-19 20:05:36 · 7 answers · asked by ImagoDei 5 in Physics