Science & Mathematics - 24 September 2007

find the slope of each line..
y = 2x - 12

y = -2/3x + 1

10x + 5y = -15

4/5x - 16y = 30

2007-09-24 13:30:46 · 7 answers · asked by toriw94 1 in Mathematics

I recently inherited a "meteorite" which was claimed to be verified as such by an "expert". It is heavy, has a dark molten pitted appearance, and was not typical of the rocks in the area (desert). I believe that it meets all the criteria of a meteorite except that it is not magnetic (or is very weak). I would appreciate any knowledgeable input. Thanks

2007-09-24 13:28:38 · 3 answers · asked by toomuchblue 2 in Earth Sciences & Geology

2007-09-24 13:27:45 · 5 answers · asked by Anonymous in Engineering

I only have about 1 more......which is good....the sun here is murder!!!!

2007-09-24 13:25:47 · 8 answers · asked by Holiday Magic 7 in Geography

2007-09-24 13:24:09 · 8 answers · asked by fronny9 1 in Physics

2007-09-24 13:23:10 · 2 answers · asked by Anonymous in Earth Sciences & Geology

Which of the following is not a characteristic of the class Chondrichthyes?
(a) Cartilage Skeleton
(b) Gill slits near the throat
(c) Live in fresh water
(d) Are ovoviviparous

2007-09-24 13:22:05 · 3 answers · asked by Kenster102.5 6 in Biology

THis is the question: Conrad's Taxi Service charges $1.50 for the first mile and $.90 for each additional mile. How far can Mrs.Sheehan go for $20 if she gives the driver a $2 tip?

I have done some work on this but I sont know if im correct or solving it properly.

Steps:
1.) $20 - $2(tip) + $18
2.) $18 - $1.50 ( 1st mile) = $16.50
3.) $16.50/divided by $.90 =18 and 1/3 miles.
4.) 18 1/3 miles + that 1st mile that was 1.50 = 19 1/3 total miles.
Does this sound coorect. Even if it does could youplease explain to me if you know how to solve this in any other ways.
If this is wrong could you also please explain?
THanks <3

2007-09-24 13:18:11 · 10 answers · asked by Softball maniak 1 in Mathematics

clear all decimals, then solve.

2007-09-24 13:16:26 · 9 answers · asked by nicole b 1 in Mathematics

2007-09-24 13:15:40 · 9 answers · asked by Anonymous in Astronomy & Space

A block with a mass of 12 kg is held in equilibrium on an incline of angle 30 degrees by the horizontal force, F.

(a) Find the magnitude of F.

(b) Find the normal force exerted by the incline on the block. (disregard friction.)

2007-09-24 13:14:26 · 2 answers · asked by Anonymous in Physics

A Block 6N is pulled along the hypotenuse. What is the work done against friction in pulling the block from bottom of hypotenuse to its top?

2007-09-24 13:14:22 · 1 answers · asked by Ase 2 in Mathematics

was it superman?

2007-09-24 13:14:20 · 7 answers · asked by Anonymous in Astronomy & Space

1) How do you find the mass of an object only knowing the speed of the object and the kinetic energy of the object
2)how do you find the speed of an object only knowing the kinetic energy and the mass
3)How to you find an objects speed at the end of something (a hill for example) only knowing the vertical drop and the mass of the object

2007-09-24 13:13:25 · 1 answers · asked by hawaiigrl 2 in Physics

2007-09-24 13:12:46 · 5 answers · asked by Anonymous in Geography

A ball is thrown upward from a building that is 100m tall

2007-09-24 13:12:25 · 1 answers · asked by John R 1 in Physics

2007-09-24 13:08:32 · 7 answers · asked by Anonymous in Physics

worth 10 points.

2007-09-24 13:07:47 · 3 answers · asked by Anonymous in Biology

Im a bit skeptical of how the big bang was created since its the only thing scientists can think.

If the galaxies and stuff were created by the big bang what created the big bang, and if something did create the big bang what created that, etc

IF you can convince ill be gay and atheist

2007-09-24 13:06:31 · 12 answers · asked by Anonymous in Astronomy & Space

2007-09-24 13:05:48 · 2 answers · asked by noyb 1 in Chemistry

what is the category of these list of clouds
list 1. __________
-stratus
-altostratus
-nimbostratus
-cirrostratus

list 2._____________
-stratocumulu
-altostratus
-cirrocumulus


p.s. i'm thinking the answers would be 'middle clouds'/'high clouds'/'low clouds..

i need answers asap..

2007-09-24 13:04:55 · 2 answers · asked by demonic_angel_666_lei 1 in Weather

a mixture of cyclopropane gas and oxygen is used as an anesthetic. Cyclopropane contains 85.7% C and 14.3 % H by mass. At 50 degrees celcius and .984 atm pressure, 1.56 g cyclopropane has a volume of 1.00 L. What is the molecular formula of cyclopropane?

2007-09-24 13:03:26 · 3 answers · asked by diamond 3 in Chemistry

I did these problems already, but I would like to check them. If you could let me know what you get so I can see if I'm doing them right or not.

1.) A bus slows down uniformly from 21 m/s to 0 m/s in 21s. How far does it travel before stopping?

2.) A worker drops a wrench from the top of a tower 80.0m tall. What is the velocity when the wrench strikes the ground?

Thanks

2007-09-24 12:57:59 · 2 answers · asked by neverisenough 1 in Physics

Last year I choose it as my major. I am only on the Second Precalculus course, I will start calculus next quarter. There is so much classes to take ahead of me. Please let me know if it is worth the struggle. And how do you like your major? Do you regret that you took this major? Also did you switch your major from engineering?

2007-09-24 12:54:52 · 5 answers · asked by Anonymous in Engineering

2007-09-24 12:54:35 · 1 answers · asked by ? 1 in Earth Sciences & Geology

2007-09-24 12:51:01 · 1 answers · asked by zahava60@sbcglobal.net 1 in Physics

A truck is going from A to B.
the speed of the truck is 70km/hour
A cab is going from B to A.
the speed of the cab is 90 km/hour.
when will the two meet?
please show the way

2007-09-24 12:49:51 · 1 answers · asked by Anonymous in Physics

2007-09-24 12:49:13 · 2 answers · asked by Anonymous in Botany

2007-09-24 12:48:54 · 1 answers · asked by r-dee 3 in Chemistry

does anybody know anything about distances in space?!?! it can be like an...inventer/discoverer/or a person who used it, or methods of making the units(Au, light yesr, parsec), when it was first used- ANYTHING WILL HELP!!! PLEASE INUCLUDE YOUR SORSE!!!!!!!!THNX FER UR HELP
-luv, pixie ^.^

2007-09-24 12:48:00 · 3 answers · asked by nevermind 3 in Astronomy & Space