Science & Mathematics - 12 January 2007

John is twice as old as Bill. Greg is 7 years older than Bill. Four years ago, the sum of their ages was 55. How old is Greg?

2007-01-12 06:28:24 · 4 answers · asked by texas_diamond_diva 1 in Mathematics

2007-01-12 06:27:26 · 7 answers · asked by texas_diamond_diva 1 in Mathematics

wont this solve our landfill problems ? will it work?

2007-01-12 06:24:24 · 9 answers · asked by I'M BACK HATERS! HORNBALL 1 in Earth Sciences & Geology

2007-01-12 06:22:58 · 10 answers · asked by Anonymous in Mathematics

We are having an ICE STORM here in KC today.
The Last time we had one all the trees broke and the power all went out for weeks. I would rather have 15" of Snow than ICE.

2007-01-12 06:20:38 · 14 answers · asked by TaylorProud 5 in Weather

2007-01-12 06:20:18 · 2 answers · asked by Anonymous in Astronomy & Space

2007-01-12 06:20:04 · 9 answers · asked by croneruk 2 in Geography

Just read about the family in New Jersey who had a golf ball size meteorite go through their roof and into their bathroom. Said it was an iron meteorite. It weighed 13 ounces. How did it get formed and how did it get up there? What makes it come down?

2007-01-12 06:16:43 · 2 answers · asked by Mom of Three 6 in Astronomy & Space

2007-01-12 06:14:39 · 7 answers · asked by Harikumar.S.N 1 in Engineering

2007-01-12 06:14:17 · 11 answers · asked by Anonymous in Mathematics

2007-01-12 06:14:02 · 12 answers · asked by Anonymous in Mathematics

2007-01-12 06:13:31 · 10 answers · asked by nancyboy 1 in Biology

My son put a carnation in water and red ink (for his science class). It has stayed there for three days and two nights and it is still pure white. The others' have turned red. What has my son done wrong? Or is the plant?

2007-01-12 06:10:59 · 3 answers · asked by Anonymous in Botany

2007-01-12 06:10:44 · 7 answers · asked by Anonymous in Astronomy & Space

In my algebra class there is a thing for extra credit (and i really need it)...It has 2 plastic squares that are clear at the 2 ends, connected by 4 plastic clear bars at each corner. In the middle it has string weaved in what looks like 2 cones conected by their tops. Do you know what it is?

2007-01-12 06:10:16 · 6 answers · asked by Anonymous in Engineering

Can anyone describe for me as when you would use Multiple Regression in statistics and give me as much additional information about it as possible, thanks :)

2007-01-12 06:10:11 · 5 answers · asked by rab773 1 in Mathematics

like through the ground coming up through the roots?

2007-01-12 06:09:29 · 5 answers · asked by Dayne's gal 2 in Physics

what are the effects of tinatus

2007-01-12 06:09:09 · 18 answers · asked by Anonymous in Biology

2007-01-12 06:07:37 · 17 answers · asked by croneruk 2 in Geography

If subatomic particles can come into existence and disappear spontaneously... then why are atoms (and other, larger objects which are composed of atoms, such as rocks, trees, houses...) not able to spontaneously "appear" and "disappear"?

2007-01-12 06:06:34 · 10 answers · asked by Kilroy 4 in Physics

2007-01-12 06:06:05 · 7 answers · asked by ←Betty B→ 2 in Zoology

Why are the number of primes not distributed evenly?

2007-01-12 06:02:44 · 6 answers · asked by 1ofSelby's 6 in Mathematics

For my science hw, I have to find the molarity of this sunbstance, here I'll show you the problem:

Determine the molarity of the following solution. Show your work to receive credit.
525 g of lead(II) nitrate, Pb(NO3)2, dissolved in 1250 mL of solution.

So heres what I got so far:

Mass = 525 g, Volume = 1250 mL x 1000 = 1250000 L
Moles of Pb(NO3)2 = mass/molar mass
Moles = 525/?

I can't seem to find the molar mass, so does anyone know?

Thanks in advance

2007-01-12 06:02:14 · 2 answers · asked by C. 2 in Chemistry

I have a new hobby of electroplating and I need to add some sulphuric acid to copper sulphate to enable me to plate my items

2007-01-12 06:01:42 · 10 answers · asked by Bob 2 in Chemistry

At each end there is a plastic square. There is 4 long plastic bars connecting them. And in the middle there is one big string which looks like they are twisted into two cones connected in the middle. Do you have any clue on what this is?!?!

2007-01-12 06:00:18 · 8 answers · asked by Anonymous in Engineering

2007-01-12 06:00:11 · 15 answers · asked by billy s 1 in Physics

how do you show that if A and B are sets such that power set of A is an element of the power set B, then A is an element of B

2007-01-12 05:56:38 · 5 answers · asked by Anonymous in Mathematics

2007-01-12 05:56:37 · 18 answers · asked by ? 6 in Weather

A bag contains 15 marbles, of which 8 are red, 5 are blue, and 2 are white. Two marbles are drawn randomly from the bag one after the other, without replacement. What is the probability that both marbles are red?

2007-01-12 05:55:15 · 12 answers · asked by Randy A 1 in Mathematics

Does the whole actual needle go in..? And how does the doctor know how much to squirt in..? What happens if an air bubble gets in? What happens if the needle goes in too much? How do you know WHERE to prick th needle through..? Do you just guess?

2007-01-12 05:53:29 · 6 answers · asked by Anonymous in Other - Science