Science & Mathematics - 10 December 2006

hello

i was wondering why do we see same stars in the sky every night
i live in europe! for example, do people in australia see other stars?
cuz i live north and they south, ?
and why are same stars in sky at winter and in summer time ?
im looking forward for some answers

2006-12-10 11:20:13 · 15 answers · asked by patrik_z 2 in Astronomy & Space

it can be like a airplane or car........and what materials do you use?

2006-12-10 11:20:01 · 3 answers · asked by Venus in Furs 5 in Engineering

For the following unbalanced equation Cu2S + O2 > Cu2O + SO2

How many moles of the second reactant O2 would be needed per mole of the first reactant Cu2 in order to complete the reaction?

What volume of oxygen gas, measured at 27.5 degrees Celsius and 0.998 atm is needed to react with 25 grams of the first reactant Cu2S?

What volume of sulfur dioxide gas is produced under the same conditions?

2006-12-10 11:19:57 · 4 answers · asked by Anonymous in Chemistry

how would you calculate the initial velocity of a soccer ball that is being kicked up in the air, and it has a velocity of 23 m/s, and the time is 2s. it was originally on the ground.

2006-12-10 11:18:26 · 3 answers · asked by starbucksluvrxoxo 3 in Physics

f(x) = 2x^2 - 36
If the following defines a one-to-one function, find the inverse.
Help please! How do you solve this?

2006-12-10 11:18:18 · 7 answers · asked by Anonymous in Mathematics

What I mean by stationary muscle contractions are exercises that don't require you to ride a bike, jog, or walk... but just remain in one place and move up and down like seesaw effect on heels/toes. Another one is reaching down toward toes and as you come up slowly contract hamstrings and gluteus muscles.

I am just curious if these stationary muscle contractions help venous blood return to the heart, preventing distentions.

2006-12-10 11:16:51 · 4 answers · asked by summation 2 in Medicine

2^x+8 = 3
Solve the exponential equation. Express the solution set in terms of natural logarithms.
How do I do this? Please show work.

2006-12-10 11:15:23 · 4 answers · asked by Anonymous in Mathematics

Please state the subunits name and formulas. ok everyone i need serious help! i would appreciate answers so much! HELP!

2006-12-10 11:14:27 · 1 answers · asked by narcissa 5 in Chemistry

Please show work. Thank you.

2006-12-10 11:13:19 · 3 answers · asked by celticevening 1 in Mathematics

what compose of magnets either natural or man made magnets (electromagnetism)

2006-12-10 11:13:05 · 4 answers · asked by DI@MOND 1 in Physics

2006-12-10 11:13:04 · 5 answers · asked by Anonymous in Physics

e^(x+8) = 3
Solve the exponential equation.

How do I do this? Please help me!!!

2006-12-10 11:12:58 · 3 answers · asked by Anonymous in Mathematics

2006-12-10 11:12:36 · 2 answers · asked by josh c 2 in Astronomy & Space

I've looked at my own sperm through a microscope, and they seem to be fairly rambunctious

2006-12-10 11:10:15 · 6 answers · asked by Johnny Angel 2 in Biology

This is for Org Chem

I don't understand nothing. This is too difficult.

I am suppose to tell which is the organic compound that the chart represents by looking at all the waves and identifying all the separate groups that form the compound.

How do I do that?????

2006-12-10 11:09:55 · 4 answers · asked by Anonymous in Chemistry

2006-12-10 11:09:46 · 3 answers · asked by NeedSASHelp 1 in Mathematics

half angle : cosine theta divide by 2= plus or minus the square root of (1-cosine theta divided by 2)
***the answer is supposed to be the sqare root of (2+ (the sqare root of 2) divided by 2) i am lost in the process???

2006-12-10 11:09:37 · 2 answers · asked by Jtothep 1 in Mathematics

i just need some of ur thougts about it

2006-12-10 11:05:14 · 1 answers · asked by another-lonely-shadow 1 in Chemistry

i live near the more snelville/lawrenceville area

do you think//or know if it will

i really want it too!!
does tht help?

2006-12-10 11:05:09 · 7 answers · asked by ~ME~ 3 in Weather

1) The dimes and quarters in Tim's piggy bank are worth $11.60. He has 32 more dimes than quarters. How many coins does he have?
2) If five times the smaller of two numbers is subtracted from twice the greater nomber, the result is 16. If the greaternumber is increased by three times the smaller number, the result is 63. What are the numbers?
Please help me solve these.

2006-12-10 11:03:14 · 5 answers · asked by Bre 2 in Mathematics

if not,then how about if the snow was packed down?

2006-12-10 11:02:51 · 10 answers · asked by wildflowerrb 2 in Weather

we broke up 5 months ago and he doesnt talk to me any more. I miss talking to him but everytime I try, he just ignores me. I don't want him back I just want to be friends again. Any advice?

2006-12-10 11:02:50 · 11 answers · asked by roxychyk 1 in Astronomy & Space

I am a intern for an interior designer. I would like to know the standared mesurments for doors and windows because I do not know. I have done reaserch on google and found nothing! Please help me so I do not get fired!

2006-12-10 11:01:49 · 1 answers · asked by Reach for the Stars! 3 in Engineering

As usual, BEST ANSWER gets 10 POINTS!!

I need a free, really good and trustful resource online about the radioactive element, polonium 218. i am trying to do my own work so help me please!!

for more chance to win 10pts, help me answer some difficult questions: specifically how it is used; how is the radioactivity being used and why use that type of element. thanks.

2006-12-10 11:01:33 · 3 answers · asked by julia k 2 in Chemistry

2006-12-10 11:01:30 · 5 answers · asked by nojy14 2 in Mathematics

will it be easier or harder than college? like will you be solving equations and concepts on a piece of paper and sweat and have headaches or will you and some partners use a special computer with programs to do the job for you. im not saying it will be an easy job but will it be easier than studying at the library until 3 am in the morning trying to cram in 15 chapters for a physics final?

2006-12-10 11:01:26 · 6 answers · asked by wtfitsnguyen 2 in Engineering

With the Nintendo Wii, youtube, post 9/11 mentality and much more, I just have this sense that the future has crept up on me, and I am not ready for it. Do you ever feel this way? What specifically gives you this feeling, and why?

2006-12-10 11:01:20 · 13 answers · asked by ifyousaysooooooooooo 2 in Other - Alternative

in triangel ABC, the measure of angel B is 21 less than four times the measure of angel A, and the measure of angel C is 1 more than five the measure of angel A. find the measure, in degrees, of each angle of triangel ABC.

2006-12-10 11:01:15 · 6 answers · asked by urzalwayz5646 4 in Mathematics

Lemonade Fun

Anne and Joe decide to sell lemonade on a hot summer day. They’re selling two sizes a 25-cent cup and a smaller 10-cent cup. At the end of the day, they’ve made $8.45.

They count the number of empty cups remaining. They started out with equal numbers of large and small cups, but now have three more small cups than large. How many cups of each size lemonade did they sell.

I NEED THREE DIFFERENT EQUATIONS/WAYS TO DO THIS... I know guess and check. other info: I have a T183 graphing calc.

2006-12-10 11:00:59 · 10 answers · asked by Purple Monkey Refridgerator! 3 in Mathematics

I'm in chemistry right now and a bit stuck right now. I need to e-mail a scientist on a topic of the Behaviors of a Liar but I don't know how to start the e-mail and what to ask really. Plus, I don't know if I should ask if I can ask them a few questions first, get a response, then send a list of questions or just ask if I can and put the questions below (if that makes sense)

For example, I'm going to ask my scientist on the response times a person takes when telling the truth and lying, but I don't really know how to start. If anyone could help me with this, I'd be very grateful! And feel free to tell me of how you started your e-mail to your scientist if you ever have done so :D Thanks!

2006-12-10 11:00:34 · 7 answers · asked by Anonymous in Chemistry