Science & Mathematics - 5 September 2007

to the next upper energy level.so imagine a black paint on a car in the sun being heated up.
so the sun gives electrons,and the paint atoms consume it and the electrons in the atoms of the paint go to the next energy level..right
so if it goes to next energy level it gains energy
so how is that we feel the heat .because according to the thery heat is given out only when energy is lost


im really confused about this

2007-09-05 13:40:25 · 2 answers · asked by ppohyhh 1 in Chemistry

And what is it?

2007-09-05 13:39:02 · 5 answers · asked by joezen777 5 in Astronomy & Space

I know there is a vein that runs down your legs. I was wondering, if the docter accidently cuts it during surgery, what happens to you?

2007-09-05 13:38:21 · 11 answers · asked by Anonymous in Medicine

divide 100 loaves among 10 men including a boatman, a foreman and a doorkeeper, who receive double portions. What is the share of each?

2007-09-05 13:37:16 · 4 answers · asked by youhavestolenmy♥ 1 in Mathematics

A rectangular plate has a length of (21.8 ± 0.2) cm and a width of (9.2 ± 0.1) cm. Calculate the area of the plate, including its uncertainty.

So far I got 200.6 ± ?? sq. cm

I'm just not sure how to find the uncertainty.

2007-09-05 13:37:14 · 2 answers · asked by Anonymous in Physics

who discovered the brain

2007-09-05 13:37:05 · 2 answers · asked by sanchezma1 1 in Medicine

2007-09-05 13:36:51 · 8 answers · asked by czech-fam@sbcglobal.net 1 in Astronomy & Space

Which had the greater displacement, the player or the ball?

2007-09-05 13:36:30 · 1 answers · asked by J L 2 in Physics

2007-09-05 13:35:51 · 8 answers · asked by Cady W 1 in Other - Science

The legs of a right /\ measure 3cm and 4cm. In another /\, one leg measures 4cm and the hypotenuse measures 5cm.
a. are the /\s congruent?
why? please explain

2007-09-05 13:34:08 · 3 answers · asked by Anonymous in Mathematics

2007-09-05 13:32:06 · 1 answers · asked by mermer r 1 in Physics

even integers exceeds twice the least by 38. what are the integers?

2007-09-05 13:29:50 · 5 answers · asked by hana s 1 in Mathematics

e.g copper malachite, copper chrome,copper oxide.copper sulphides, copper bonite

2007-09-05 13:28:30 · 2 answers · asked by Clement c 1 in Earth Sciences & Geology

BO2, KCl, NH3, C6H12O6..... and also any tips on how to figure this out on my own... thanks!

2007-09-05 13:27:08 · 4 answers · asked by Anonymous in Biology

I'm stuck on these 3 problems.

1.) The time t (in seconds) that it takes for a pendulum to complete one period is approximately t = 1.1 square root of L, where L is the length (in feet) of the pendulum. How long is the period of a pendulum of the length 10 ft?

2.) The time t (in seconds) that it takes for a rock to fall a distance d (in meters) is approximately t = 0.45 square root of d. How long does it take for the rock to fall a distance of 200 m?

3.) Explain why n square root of a (little n in front of the square root) and a real nth root of a need not have the same value.

PLEASE HELP! I will give best answer!

2007-09-05 13:25:16 · 4 answers · asked by charmedrules10 2 in Mathematics

2007-09-05 13:21:04 · 12 answers · asked by cheerbabe4095 1 in Astronomy & Space

I need help with Earth Science, and thats one of the questions in the book. But I cant find the answer anywhere. Please help!

2007-09-05 13:20:51 · 10 answers · asked by meatless_mind 2 in Astronomy & Space

How would you change this parametric equation to Cartesian?

x = sin(2πt)
y = cos(2πt)

2007-09-05 13:17:09 · 3 answers · asked by AdrianG430 1 in Mathematics

plz help i dont understand if can can u also explain how to solve these problems.....11-4x which is equal to and greater than 12....and the 2nd one is 2x-15=8

2007-09-05 13:16:16 · 2 answers · asked by ash_rash_13 1 in Mathematics

okay so my school is retarded and they're still changing schedules 2 weeks into the new school year ): .....they switched me out of chemistry honors and put me into physics honors.....as of right now i am completely lost in that class....becuase i missed most if not all of chapter 1.....i kind of understand the formulas.... from chapter1 that talk about velosity and so on.....but now we've moved on to chapter 2 which talks about vectors and stuff...and i'm scared that it will only get harder...i've tried getting out but....my consulor told there is no room in my schedule.....will it get easier....or only get harder....i've only been there for 3 days?....and it's not like i'm super not smart.....please any advice?

2007-09-05 13:14:18 · 7 answers · asked by iRock 1 in Physics

*Not for creationists

http://en.wikipedia.org/w/index.php?title=Timeline_of_evolution&oldid=143698541

How interesting is that?! I don't care if some of that stuff isn't right but that is so interesting to read.

2007-09-05 13:13:48 · 1 answers · asked by Anonymous in Other - Science

I can get the correct integral but when I calculate the definite integral using the limits of integration I get the wrong answer. I know you have to change the limits of integration during the problem since you use u-substitution but I still get the problem wrong. I would really appreciate any help!

2007-09-05 13:11:12 · 1 answers · asked by mjs3382 1 in Mathematics

Two elevators stopped athe the sixth floor are making a decent to the first floor. The slow elevator takes two minutes to reach a floor. The fast elevator takes one minute to reach a floor. There are people waiting on each floor for an elevator and the elevator that reaches the floor first must pick up the passengers. It takes three minutes to pick up the passengers. If both elevators start on the sixth floor and the same time, which will reacht the first floor first? How long does it take?

2007-09-05 13:09:17 · 8 answers · asked by Anonymous in Mathematics

I have had first hand experience with things like psi balls and premonitions. I have also tried pyrokenisis and levitation. I just truly want to know why dont you believe? There is proof of people being able to see the future there is prove of people being able to levitate and i myself have been able to show other people my psi balls. Also if we only use like 9% of our brains or something like that, how do u know that the other 91% isnt the ability to levitate or use other "super human powers". There is also videos of African shamans being able to levitate. Chi which some people think is fake has been scientificaly proven to be real. A chinese monk was put under a thermal heat sencors and they discovered that he could control unexplained energy movments in the form of heat throughout his body. That is what chi is and that is what most skeptics also think is fake. So after all of this typing to sum it all up why don't you believe?

2007-09-05 13:01:44 · 29 answers · asked by Anonymous in Parapsychology

help me solve this plz..

y=x-7 and 2x+y=8

2007-09-05 12:58:04 · 4 answers · asked by Anonymous in Mathematics

When scientists forcefully answer that life cannot exit on Mars, due it's conditions, I think they aren't thinking clearly.

What makes them say tht beings cannot live there. Jyust because we can't doesnt mean other cannot! I mean, so it may be at certain times extremely cold/hot, but could evolution and adaption solve tht(tht might take a while, tho) And also, they always point out tht no one can breathe because of the lack of oxygen.C'mon! What if the anatomy of such a creature could handle the air of Mars!?! nuff said, your thoughts???

2007-09-05 12:57:11 · 5 answers · asked by r u serious 1 in Astronomy & Space

science

2007-09-05 12:55:49 · 2 answers · asked by Anonymous in Earth Sciences & Geology

a stone is dropped from a roof. a second stone is dropped 1.5 seconds later. how far apart are the stones when the second stone reaches a speed of 12 m/s

2007-09-05 12:53:39 · 1 answers · asked by Anonymous in Physics

2007-09-05 12:53:20 · 2 answers · asked by ash_rash_13 1 in Mathematics

Can liquid helium be stored indefinitely in a sealed container? I need to permanently seal a superconducting magnet in liquid helium. A persistent current will be induced in the superconductor and it is said that it will persist forever, theoretically. This has an immensely important application. But I just want to ensure the container won't blow up, once it's permanently sealed. Also, what material would the container be made of?

2007-09-05 12:50:15 · 4 answers · asked by Flash Gordon 4 in Physics