Science & Mathematics - 4 February 2007

2007-02-04 02:38:03 · 6 answers · asked by tonguetwister49m t 1 in Astronomy & Space

A jet leaves an airport traveling at a steady rate of 600 km/h. Another jet leaves the same airport 3/4 hours later traveling at 800km/h in the same direction. How long will it take the second jet to overtake the first?

DO NOT SOLVE IT! JUST SHOW ME HOW TO SET IT UP AND WHY YOU SET IT UP LIKE THAT!

2007-02-04 02:37:51 · 7 answers · asked by Anonymous in Mathematics

2007-02-04 02:36:44 · 2 answers · asked by goring 6 in Astronomy & Space

8x^3-6x-9y+27y^3
(explain how u have solved it,if u can)THAAAAAAAAAAANNNX!!!

2007-02-04 02:35:50 · 4 answers · asked by Xa!ny 2 in Mathematics

2007-02-04 02:32:06 · 1 answers · asked by goring 6 in Astronomy & Space

2007-02-04 02:31:25 · 4 answers · asked by Anonymous in Earth Sciences & Geology

2007-02-04 02:30:21 · 7 answers · asked by Junior 1 in Geography

2007-02-04 02:29:22 · 10 answers · asked by Anonymous in Physics

I mean, high school chemistry lab has all kinds of experiments to turn compounds into other compounds. Can this be done on a global scale to reduce CO2 levels? It sounds too obvious, so what are the complications?

2007-02-04 02:29:12 · 4 answers · asked by Anonymous in Chemistry

a cylindrical metal pipe has exernal diameter of 6cm and internal diameter of 4cm calculate the volume of metal in a pipe of length 1m. if 1cm of the metal weighs 8g (i.e the density of the metal is 8000kgm)find the weight of the pipe

2007-02-04 02:28:36 · 9 answers · asked by none 2 in Mathematics

I ve heard of this Bose Einstein Condensater. Not sure what it does, can some plz explain?

Also i ve heard that it can freeze light to a stand still ! is this really possible..... how will the nature of photons change if so??

2007-02-04 02:28:33 · 3 answers · asked by sh 1 in Astronomy & Space

Which one of them is more likely to get a job, which one need more experience in engineering science.

2007-02-04 02:28:29 · 7 answers · asked by rose 2 in Engineering

2007-02-04 02:27:36 · 7 answers · asked by robert c 2 in Zoology

2007-02-04 02:27:29 · 1 answers · asked by goring 6 in Astronomy & Space

2007-02-04 02:26:31 · 3 answers · asked by Anonymous in Chemistry

6 cells are connected in series to form one battery. Ea cell has a rating of 1.5V and 1A. AWG 18-ga wire joins the + terminal of the battery formed by the series to an indicator lamp located 300ft away. another 300ft length of AWG 18ga wire runs from the lamp back to the battery's neg pole. The lamp acts as a 50 ohm resistor.
1. total voltage and amperage supplied by battery?
2. total resistance resulting from 600ft of 18ga wire?
3. total voltage drop across wire?
4. total voltage drop across lamp?

Please show formulas used to calculate answers. Stuck on this one bigtime.

Thanks!

2007-02-04 02:25:59 · 2 answers · asked by Anonymous in Engineering

2007-02-04 02:24:36 · 6 answers · asked by n 1 in Earth Sciences & Geology

A can run 3/4 times as fast as B .If A gives B a start of 60 metres, how far must the winning post be in order that A & B reach it at the same time?

2007-02-04 02:22:18 · 4 answers · asked by abc 1 in Mathematics

I ve heard of this Bose Einstein Condensater. Not sure what it does, can some plz explain?

Also i ve heard that it can freeze light to a stand still ! is this really possible..... how will the nature of photons change if so??

2007-02-04 02:12:07 · 2 answers · asked by sh 1 in Physics

2007-02-04 02:11:14 · 5 answers · asked by Anonymous in Geography

I need to know the circumference at the 30th parallel, the 40th, etc. Does anyone know of a chart or a way to estimate it?

2007-02-04 02:11:10 · 3 answers · asked by Big John 1 in Earth Sciences & Geology

2007-02-04 02:10:45 · 3 answers · asked by farisaden 1 in Zoology

2007-02-04 02:10:32 · 2 answers · asked by swamp cat 1 in Astronomy & Space

Its a 75 KW motor, fluctuates dynamic input KW from 1 to 22 KW with constant load (40 to 55 Amps).What are possible reasons?

2007-02-04 02:09:31 · 3 answers · asked by srinivas v 1 in Engineering

whats the current status of the universe? is it expanding, open or contracting?

Well, i know that tests show that its still expanding.... but then how can we be sure whether the farthest ends of the universe have started to recoil/contract.
We wouldnt know cos this info to come to us will take so much time.

so how can we be sure?

2007-02-04 02:09:22 · 11 answers · asked by sh 1 in Astronomy & Space

2007-02-04 01:58:11 · 2 answers · asked by lalala 1 in Biology

Also, 1 inch of snow is expected and winds up to 20mph. I live in a small rural place in northeast Ohio.

2007-02-04 01:57:15 · 8 answers · asked by yoshi2919 2 in Weather

Is it possible for the velocity to remain while the speed varies?

-and-

Is it also possible for the velocity to change while the speed remain as constant?

I need examples for m two questions...

... I know these might been so tough... but please help me find the answers...

Thanks!... To the one who will be a great help to me for this one, "I owe my homework to you"

2007-02-04 01:55:39 · 9 answers · asked by Anonymous in Physics

i only know 1 of
does anybody know anymore??

2007-02-04 01:54:34 · 1 answers · asked by Anonymous in Earth Sciences & Geology

2007-02-04 01:49:41 · 3 answers · asked by V JAYASREE K 2 in Geography