Science & Mathematics - 23 November 2007

how many diffrent number combinations can you make with the nuber 1-56???

2007-11-23 16:53:29 · 2 answers · asked by Chris W 1 in Mathematics

There is a lot of oil beneath other desolate areas of the world. I was just wondering if anyone has ever heard of any oil exploration there.

2007-11-23 16:51:33 · 3 answers · asked by Anonymous in Earth Sciences & Geology

2007-11-23 16:47:47 · 5 answers · asked by Anonymous in Mathematics

My music teacher played it once. It was a piano composition, I think, and it was based on how the planets line up, their speeds, and other space math. It was actually very pretty :D My teacher said that it's how the solar system would sound if it were put on staves.

Does anyone have a link or an idea of what that song was? Please, I would love to find it again!

2007-11-23 16:44:05 · 5 answers · asked by Leafy 6 in Astronomy & Space

2007-11-23 16:30:52 · 11 answers · asked by tim D 3 in Engineering

PLEASE EXPLAIN BRIEFLY AND LABEL ANSWERS!

At the instant a traffic light turns green, a car starts from rest and accelerates uniformly at a rate of 4.0 metres/second^2 [E]. At the same instant, a truck travelling with a constant velocity of 90.0 km/hour [E] overtakes and passes the car.

a) How far beyond the starting point is the car after 10.0 seconds?

b) How far beyond the starting point is the truck after 10.0 seconds?

c) The car passes the truck at a distance of 312.5 metres beyond the starting point. How fast is the car travelling at this instant?

d) How long does the car take to pass the truck?

e) Both drivers suddenly see a barrier 100.0 metres away and hit their brakes at exactly the same time. Assuming that both vehicles decelerate uniformly, and they take 3.0 seconds to stop, will they stop in time?

2007-11-23 16:25:07 · 3 answers · asked by Deloris 1 in Physics

Okay, I don't understand these things:

If you have o.500 mol of KCL, some distilled water, and a 250. mL volumetric flask, how can you make a 0.500 M solution of KCl?

I think it's the concentration formula, Cmolarity= mol of solute / volume of solution, but you would need a 1 Liter flask wouldn't you??

and which of these has a greater mass of solute, 1 liter of 0.1 M NaCl, or 1 L of 0.06 M of Na2CO3? :| please help?

thank you

2007-11-23 16:20:10 · 2 answers · asked by mcstennis09 3 in Chemistry

ughs someone help me please! i dont get that! =[...thank you.

2007-11-23 16:14:37 · 2 answers · asked by Anonymous in Earth Sciences & Geology

4Fe(s) + 3O2(g) -> 2Fe2O3(s) ΔH= -1652KJ

a. how much heat is released when 4.36mol iron is reacted with excess O2?

b. how much heat is released when 1.04mol Fe2O3 is produced?

c. how much heat is released when 2.26g iron reacted with excess O2?

d. how much heat is released when 10.6g Fe and 1.43g O2 are reacted?

all in KJ

2007-11-23 16:10:28 · 2 answers · asked by Anonymous in Chemistry

on thermal conduction with special emphasis.

2007-11-23 16:07:48 · 5 answers · asked by Tsubasa J 1 in Physics

2007-11-23 16:05:38 · 2 answers · asked by sukhjit r 1 in Biology

I was looking around in Google Sky (part of Google Earth), and I found a strange looking something at location -32.3087, 159.717 . I can't figure out whether it's an actual stellar object or just an error with the camera. If anyone know where I could find out what this is, I'd appreciate it. My curiosity is getting the better of me.

2007-11-23 15:58:04 · 3 answers · asked by maglite 1 in Astronomy & Space

for example some are writing "10,000" as "10 K". what is the meaning behind this? what does the " K " mean / stands for?

2007-11-23 15:57:13 · 11 answers · asked by Anonymous in Mathematics

2007-11-23 15:54:12 · 7 answers · asked by Anonymous in Astronomy & Space

multiply

2m(5m-3)(4m+7)

2007-11-23 15:45:32 · 4 answers · asked by crazy4u 1 in Mathematics

A friend and I were thinking about how to approach the following problem:

Given a 3-dimensional cubic grid ([1,7] x [1,7] x [1,7]) in discrete coordinates (343 points total), we want to pick a small number of points in the grid so that *every* point in the grid can be reached from one of the chosen points by traveling along at most 3 unit line segments.

In other words, we want a minimal covering of the grid by octahedra of radius 3. Each octahedron can cover 25 points, so it's clear that at least 14 will be required, but I suspect that overlap will increase that number by a few.

Any ideas about how to go about solving this?

2007-11-23 15:45:00 · 1 answers · asked by gremlinn007 2 in Mathematics

three blocks are attached by cords that loop over frictionless pulleys. Block B lies on a frictionless table; block A hangs to the left side of the table and block C hangs to the right side. the masses are mA = 5.40 kg, mB = 8.00 kg, mC = 14.5 kg. When the blocks are released, what is the tension in the cord at the right?

2007-11-23 15:43:46 · 2 answers · asked by Anonymous in Physics

180=-16t^2+112t

2007-11-23 15:42:19 · 5 answers · asked by too_b2000 1 in Mathematics

Consider a linear array of n = 10 identical blocks all initially at rest on a frictionless horizontal tabletop. The blocks are labeled 1 through "n", reading from left to right. The block all the way on the left (#1) is pushed to the right so that it has a speed of v = 15 m/s before colliding into the block immediately to its right (#2). After this #2 collides into #3, #3 collides into #4, and so on. Determine the speed of the right most block (#n) when it finally starts moving. Assume that the coefficient of restitution between each block is E = 0.72.

2007-11-23 15:35:05 · 1 answers · asked by jerseyshore man 2 in Physics

and ironicaly I don't meant ionicly.

2007-11-23 15:26:56 · 12 answers · asked by magnetic__reversal 2 in Physics

2007-11-23 15:25:05 · 1 answers · asked by kathe 1 in Chemistry

2007-11-23 15:23:45 · 5 answers · asked by i love ricky 1 in Geography

Use synthetic Division to decide whether the given number is a zero of the given polynomial>

3:f(x)=9x^3+x^2+4x-5

2007-11-23 15:20:37 · 2 answers · asked by Anonymous in Mathematics

what do i have the most room to grow in?

2007-11-23 15:17:30 · 3 answers · asked by funny name 1 in Engineering

does rubbing alcohol have Hydrogen peroxide in it?

2007-11-23 15:11:56 · 3 answers · asked by mimi 1 in Chemistry

Why do some people want to stop global warming and were like 5 years away from the world coming to the end???

2007-11-23 15:00:41 · 22 answers · asked by GNRfan 2 in Astronomy & Space

This is what I wrote .
The company name is made up

Dear Mr. Smith:

I am submitting my resume for the position of *Entry level Electrical Engineer* as listed on the Carrerbuilder website. Allow me to highlight how I can be a valued asset to LASKO , Inc. LASKO , Inc has a reputation for its qualified and friendly staff, and i believe i can make a positive addition to your team

My degree in Electrical and Computer Engineering and my experience in customer service has sharpened my professional office skills, which are complemented by a positive, can-do attitude, excellent listening , and my commitment to quality and accuracy. I believe in understanding the technical industry from the ground-up and working as an electronics technician for a year has given me skills to design and conduct electronic tests, analyze and report the test data, and make recommendations for follow-up actions.

2007-11-23 14:55:56 · 3 answers · asked by Anonymous in Engineering

Subtracting fractions??
easy steps??
please!

2007-11-23 14:50:13 · 6 answers · asked by HalieeBoBaliee. 2 in Mathematics

on fluoxetine 20mgx2 per day since july 06 had serious malfunfunction 31 oct o7 few in between now out patient at acute day phyciatriatric unit still want to be let go

2007-11-23 14:48:05 · 5 answers · asked by Anonymous in Medicine

i tottally need help

2007-11-23 14:47:29 · 12 answers · asked by Anonymous in Astronomy & Space