Science & Mathematics - 6 July 2007

did they all die straight away or did it take along time..hundreds of years before they all died ?

2007-07-06 08:34:30 · 12 answers · asked by roan 2 in Other - Science

I really need the answer to this pendulum problem ASAP. Thank you so much!

A pendulum of length L has a bob of mass M at the end of it. The bob is attached to a spring that has a force constant k. When the bob is directly below the pendulum support, the spring is unstressed. Derive an expression for the period of this oscillating system for small-amplitude vibrations (assume there is no displacement from the horizontal). Suppose that M = 2.80 kg and L is such that in the absence of the spring the period is 2.90 s. What is the force constant k if the period of the oscillating system is 1.45 s?

2007-07-06 08:29:16 · 4 answers · asked by YoDaddyHoe 1 in Physics

2007-07-06 08:27:49 · 10 answers · asked by Cyprus.1 2 in Physics

10 gallon gas tank
28 miles to the gallon
round trip 1200 miles
average gas price $2.99 p/gallon
total gas cost of trip =

2007-07-06 08:27:41 · 12 answers · asked by Anonymous in Mathematics

Last question for the day! I swear! XD Sorry. This is my last worksheet anyway. (x-7)^2= ?

How do you do these? Can someone give me a rundown and how to do them? I guess you have to square them but I'm not getting it...

2007-07-06 08:27:33 · 10 answers · asked by Katbot 2 in Mathematics

2007-07-06 08:24:32 · 5 answers · asked by Lauren P 1 in Zoology

2007-07-06 08:16:07 · 4 answers · asked by Anonymous in Chemistry

and would they effect the nhs budget more than smoking related illnesses

2007-07-06 08:09:27 · 10 answers · asked by slh74 2 in Chemistry

2007-07-06 08:07:54 · 7 answers · asked by Anonymous in Physics

2007-07-06 08:06:14 · 5 answers · asked by . 1 in Earth Sciences & Geology

2007-07-06 08:05:11 · 3 answers · asked by abhishek b 1 in Engineering

If a sub-standard production method was employed, for indefensible reasons, then someone would be answerable, for negligence, or worse.

2007-07-06 08:04:26 · 4 answers · asked by grbpe2005 1 in Engineering

Please explain how you got your answer with physical proof. No apriori thinking please. 1+1 in real usuage.

2007-07-06 07:57:57 · 9 answers · asked by Anonymous in Mathematics

If you do think they exist, where could they be comming from. Are scientist doing research to find, if there really are aliens and UFO's? Do you think, that we will ever find out if aliens do exist?

2007-07-06 07:57:37 · 12 answers · asked by Anonymous in Astronomy & Space

has anyone read the story about this boy? do you think its real? and i yo havent google boriska boy.

2007-07-06 07:49:58 · 5 answers · asked by Anonymous in Astronomy & Space

1st question: x2 +8xy+16y2= (x+4) (x+4)
2 are squared. Is that correct then?
And I just asked a question and you guys really helped me but I don't get this

c^2 + 2cd + d^2 what are the ^ standing for? Because on my worksheet they aren't there. Thanks again guys you really are helpful!

2007-07-06 07:44:58 · 8 answers · asked by Katbot 2 in Mathematics

The larger number is 3 more than twice the smaller numbers. Find the numbers.

2007-07-06 07:39:33 · 10 answers · asked by Renee S 1 in Mathematics

concidering that i have no idea what a one-to-one function is, i find it rather difficult to asnwer this question, but my guess is -2... but i have no idea.

2007-07-06 07:36:50 · 4 answers · asked by borninaugust30 3 in Mathematics

The grey clouds have moved on and there's this large orb that I don't recognise....

2007-07-06 07:34:33 · 37 answers · asked by pirate_princess 7 in Astronomy & Space

Help?! I don't get this, this is my second sheet and I don't get this one. It's nothing like the 1st one I got. You guys helped me with it earlier today. The problems on this is x2 + 4xy +4y2 =?

The 2 are squared and the c2 in the 1st problem is squared too, can someone help me understand how to find the factors? Like what? I'm not getting this at all. I just need to see it step by step and explain and then I will be able to do the 24 other ones. Thanks you so much!

2007-07-06 07:33:27 · 13 answers · asked by Katbot 2 in Mathematics

1) Jay's salary is 2/3 of his wife's salary. In Jan., wen they both get $2000 raises, their combined income will be $49000. What are their current incomes?

2) A width of a rectangle is 6 cm less than the length. A second rectangle, with a perimeter of 54 cm, is 3 cm wider and 2 cm shorter than the first. What are the dimensions of each rectangle?

3) Victor earns $3 an hr working after school and $4 an hour wokring on Saturdays. Last week he earned $43, working a total of 13 hrs. How many hours did he work on Saturday?

could u show me how you did the question? thanks so much.

2007-07-06 07:31:02 · 6 answers · asked by Anonymous in Mathematics

ok, what would hapen if i shot a bottle rocket into a thunderstorm, and a milisecond before the rocket exploded, lighning hit it. then the rocket, with the lightning's energy corsing through it, explodes. would the lightning magnify the explosion, cancel it ot, or would the explosion be the same. I know it would never hapen, but im curious.

2007-07-06 07:29:57 · 10 answers · asked by cdeed 2 in Physics

please tell me the acurate rate of stars in the sky with proof.......so go0d luck.........

2007-07-06 07:28:03 · 13 answers · asked by Anonymous in Astronomy & Space

Just want to know if you get to know the answerers/questioners for what they contribute on Yahoo Answers. I am not asking whether you get to know them personally. For example, apparently in the category Yahoo products/ Yahoo answers they seems to know each other. However, this is not the case in the category Movies.

2007-07-06 07:25:44 · 2 answers · asked by My account has been compromised 2 in Other - Science

For people out there who don't believe:

Explain the American Flag
Explain Moon Rocks
Explain all the videos, pictures, spaceships, spacesuits.

I got you didn't I. :-)

2007-07-06 07:24:50 · 17 answers · asked by Anonymous in Astronomy & Space

At 126 K and 21 atm, compute the molar volume of oxygen gas assuming it is an ideal gas.

2007-07-06 07:24:20 · 0 answers · asked by g2hn 3 in Chemistry

2007-07-06 07:23:35 · 10 answers · asked by Anonymous in Astronomy & Space

2007-07-06 07:22:07 · 2 answers · asked by F J 1 in Earth Sciences & Geology

Using the law of corresponding states, calculate the molar volume of oxygen gas at 126 K and 21 atm.

2007-07-06 07:21:47 · 3 answers · asked by g2hn 3 in Chemistry

I have seen these only a couple of times...a GIGANTIC BLACK FLY...when I say 'gigantic', I MEAN IT..we are talking TWO INCHES LONG. I saw it flying around like some kind of black shadow, and thought it was some type of moth, until it landed at the edge of a puddle for a few moments and I managed to get close enough to see it was a FLY, with a head that closely resembled that of a horsefly, with those big hemispherical eyes pressed closely together. It looked like an insect version of Darth Vader! I am in Southern Ontario. Anyone know what these are?

2007-07-06 07:19:09 · 1 answers · asked by Lili M 2 in Zoology