Science & Mathematics - 12 October 2006

I am trying to find out what is a primordial comet.. anyone know ?

2006-10-12 17:50:58 · 6 answers · asked by Anonymous in Astronomy & Space

Two skaters on in-line skates, Lisa and Bart, are initially at rest. They push apart. and start moving in opposite directions. If Lisa's speed just after they push apart is 2.0 m/s and her mass is 85% of Bart's mass, how fast is Bart moving at that time?

2006-10-12 17:50:38 · 8 answers · asked by bdbush007 3 in Physics

2006-10-12 17:49:42 · 5 answers · asked by sp1nkxter 4 in Mathematics

but explain it s-l-o-w-l-y so I can understand :P

2006-10-12 17:48:33 · 11 answers · asked by whatwhatwhat 5 in Other - Science

2006-10-12 17:48:07 · 1 answers · asked by lekh raj b 1 in Engineering

2006-10-12 17:47:42 · 2 answers · asked by lekh raj b 1 in Engineering

2006-10-12 17:39:13 · 10 answers · asked by SEREN0 2 in Mathematics

I am having trouble with balancing equations. The problems I am working on just give the name of the element, but not the number of atoms. For example, I know oxygen is diatomic, so it has two atom, right? How can I figure out the number of atoms for the other elements on the periodic table? PLEASE HELP!!!!

2006-10-12 17:32:14 · 4 answers · asked by marpiesharker 1 in Chemistry

In principle, anytime someone jumps up, the earth moves in the opposite direction. To see why we are unaware of this motion, calculate the recoil speed of the earth when a 77.0 kg person jumps upward at a speed of 2.30 m/s .
*If anyone has any clue how to do this please let me know*
THANKS GUYS!!! :)

2006-10-12 17:31:07 · 2 answers · asked by cheezo12 1 in Physics

2006-10-12 17:31:02 · 12 answers · asked by nap 3 in Astronomy & Space

A person kicks a ball a friend starts from rest, at the same point alongside the person,runs down the field at a constant acceleration toward the reciever. if the kicker kicks the ball at a 76.0 degrees above the horizontal, what acceleration does the friend need in order to arrive and tackle the reciever just as he catches the ball?

2006-10-12 17:23:11 · 1 answers · asked by Anonymous in Physics

2006-10-12 17:21:34 · 7 answers · asked by John 1 in Mathematics

5 to the power of -2+5 to the power of 0-5 to the power of 3-5 to the power of -1.

2006-10-12 17:21:02 · 4 answers · asked by Tank 1 in Mathematics

2006-10-12 17:20:23 · 6 answers · asked by clashingtaco 2 in Mathematics

320 kva to watt/horsepower

2006-10-12 17:17:23 · 7 answers · asked by thorgey 1 in Engineering

Very annoying... How does this happen? Is it a marketing ploy?

2006-10-12 17:16:25 · 10 answers · asked by Anonymous in Physics

2006-10-12 17:14:43 · 6 answers · asked by Blacktemp06 1 in Botany

dazzle me

2006-10-12 17:05:43 · 8 answers · asked by honest abe 4 in Mathematics

The average concentration of potassium ion in seawater is 400. mg of potassium ion per kg of seawater. What is the molarity of the potassium ion if the density of the seawater is 1.025 g/mL.

2006-10-12 17:05:14 · 1 answers · asked by cheezzznitz 5 in Chemistry

If 47.5 mL of 0.250 M HCl solution is needed to neutralize a solution of Ca(OH)2, how many grams of Ca(OH)2 must be in the solution?

2006-10-12 17:04:51 · 1 answers · asked by cheezzznitz 5 in Chemistry

Here are two more problems #1)3x^y^-xy^-4y^ #2)2x^+3xy+y^ {THE "^" Stand for squared}. It would be great if you can explain how to factor the y, I always get stuck there. Thanks!

2006-10-12 17:04:51 · 5 answers · asked by raider 1 in Mathematics

If you dilute 15.0 mL of the stock solution to a final volume of 1.00 L, what will be the concentration of the diluted solution?

2006-10-12 17:02:36 · 4 answers · asked by cheezzznitz 5 in Chemistry

How many milliliters of a stock solution of 11.0 M HNO3 would you have to use to prepare 0.500 L of 0.200 M HNO3?

2006-10-12 17:02:08 · 1 answers · asked by cheezzznitz 5 in Chemistry

2006-10-12 17:02:01 · 5 answers · asked by Timmy Boy 1 in Other - Science

solve for x and solve y, look for double sets

2006-10-12 17:01:39 · 3 answers · asked by honest abe 4 in Mathematics

please include the charges.

2006-10-12 17:00:57 · 1 answers · asked by cheezzznitz 5 in Chemistry

Write the balanced complete ionic equations and net ionic equations for Pb(NO3)2(aq) and Na2S(aq)?


Please include charges.

2006-10-12 17:00:13 · 1 answers · asked by cheezzznitz 5 in Chemistry

Write the balanced complete ionic equations and net ionic equations for Na2CO3(aq) and MgSO4(aq)

Please include charges.

2006-10-12 16:59:37 · 2 answers · asked by cheezzznitz 5 in Chemistry

2006-10-12 16:58:35 · 26 answers · asked by darkvadershield35 2 in Weather

Does a 3.6g sample of lithium contain 3.1*10(exp 23) atoms?

2006-10-12 16:55:03 · 4 answers · asked by Anonymous in Chemistry