Science & Mathematics - 14 October 2007

You and a friend share teh driving on a 280 mile trip. Your average speed is 58 miles per hour. your friend's average speed is 53 miles per hour. You drive one hour longer than your friend. How many hours did each of you drive?

2007-10-14 21:26:58 · 8 answers · asked by Anonymous in Mathematics

if z=3-4i
w= 1+3i
write z/w in polar form

2007-10-14 21:22:54 · 7 answers · asked by mikemallow 1 in Mathematics

Suppose the average blink of an eye takes one twentieth of a second and you blink 10 times per minute. If you travel at an average speed of 90 km/h for 4 hours, how many kilometres will you travel with your eyes closed......

Before anyone asks is not homework!! im sick of people askin

2007-10-14 21:17:16 · 2 answers · asked by crazy_foz51 2 in Mathematics

2007-10-14 21:10:36 · 3 answers · asked by Anonymous in Astronomy & Space

Answer is not :-
6 , 5, 6^6 , 6! , (6!)^2 , 5!

2007-10-14 21:09:02 · 7 answers · asked by Anonymous in Mathematics

Just curious.

2007-10-14 21:05:47 · 12 answers · asked by emesumau 4 in Weather

i have a recitation tomorrow and i want to make sure I know what i am doing

http://class.phys.psu.edu/212Recitations/07_Circuits/DC_Circuits.pdf

ok in exercise 1, i figured the order should be B,A,C,D

i dont know if i'm right, but wouldn't less resistance mean more power? so less resistors equal more power? and parallel resistors would yield more power than resistors in a series?


part b of exercise 1


would the order be the same as well?

part2
I have no idea, i need help on this one.

2007-10-14 21:04:28 · 1 answers · asked by Anonymous in Physics

i need help w/ Lab exercise 2

http://class.phys.psu.edu/212Recitations/07_Circuits/DC_Circuits.pdf

2007-10-14 20:59:35 · 1 answers · asked by Anonymous in Physics

I'm wondering what the datum the U.S. Army uses as a standard when calculating a position in UTM? I'm wondering if they use WGS84 or if there is some other standard the Army uses.

2007-10-14 20:56:07 · 2 answers · asked by gharabedian 1 in Engineering

Compute the force (in Newtons) exerted by the water against either end of the pool. Do not include the force due to air pressure.

2007-10-14 20:49:32 · 1 answers · asked by Paul C 1 in Physics

I know with out a doubt that evolution happend there is no question in my mind, I even wanted to be an archeologist/paleontologist when I was a child, but when I see questions like what came first the chicken or the egg, I almost automatically think, the chicken because of the way god created all animals. I realize that,there are many conflicting things along these lines but is is possible to believe in both, even a little?

2007-10-14 20:41:38 · 12 answers · asked by jennifer p 2 in Zoology

If hotter air rises, why is air that is closer to the Earth's surface warmer than the air high above it? It was a question that I had to do. Anyone know it?

2007-10-14 20:40:56 · 4 answers · asked by anonymous 3 in Weather

I understand that the Michelson-Morley result supports Einstein's first postulate and I understand how this postulate suggests such relativistic phenomena as time dilation and length contraction, but I read that Einstein was unaware of the Michelson-Morley result at the time of his theory's publication. So, what DID lead him to postulate the constancy of the velocity of light in vacuo???

2007-10-14 20:39:27 · 3 answers · asked by PhotonMan6.022 1 in Physics

ive drawn like a billion diagrams to model this situation but it still doesnt help. and NO, this not hw. it IS in my math textbook but im doing it as practice and not to get good grades...and hopefully you all believe me.

anyways:
two miles upstream from his starting point, a canoeist passed a log floating in the rivers current. After paddling upstream for one more hour, he finally paddled back and reached his starting point just as the log arrived. Find the speed of the current.

the part i get screwed up at is when i have to take into consideration the guy going "upsteam" so against the current which will obviously affect his speed. and downstream which will make him go faster.

oh and please show me how to solve it STEP BY STEP so i acutally KNOW how to do it.

2007-10-14 20:38:42 · 8 answers · asked by <3pirate 6 in Mathematics

2007-10-14 20:29:50 · 3 answers · asked by hua_alexander 2 in Mathematics

Maria has twice as much money as Paul.
Paul has $8 more than Rocky.
Together they have $104.
How much does each have?

Help by showing step by step.

Paul:$28 Maria: $56 Rocky: $20

2007-10-14 20:20:53 · 5 answers · asked by persevere 2 in Mathematics

2007-10-14 20:14:42 · 1 answers · asked by JDA 1 in Engineering

Thanks for all the help!!

2007-10-14 20:10:16 · 5 answers · asked by Thalia 4 in Astronomy & Space

What is the circumference of a circle with a diameter of 4?
What is the area of a circle with a diameter of 4?

2007-10-14 20:08:28 · 8 answers · asked by Sweet*Angel 3 in Mathematics

2007-10-14 19:53:27 · 2 answers · asked by DeDEvil 1 in Other - Science

Do they use marrow like us? their skeletal structure is quite different from mamals in that they dont have bone.

2007-10-14 19:43:23 · 2 answers · asked by Anonymous in Zoology

geosciences
1. a pioneering geologist who coined the world geology
a. Aristotle b. aldrovandus c. anaximenes d. axaimander e. thales
2. which of the ff. is not a major branch of geosciences?
a. astrology b. astronomy c. geology d. meteorology e. oceanography
3. prehistorical animals such as dinosaurs, plesiosaurs, mammoths, mastodons, saber tooth tigers are studied specifically on the science of
a. polynology b. invertebrate paleontology c. micropaleontology d. vertebrate paleontology e. paleobotany
4. scientific and geology is evidences that support the continental drift theory
a. similarity in coastline b. sea floor spreading c. polar wandering and paleomagnetism
d. similarity in fossils e. all of the above
5. a genus of the fossil land dwelling reptile that served to support the drift theory upon its discovery in continents of south America , India, and Antarctica
a. mesosaurus b. lystrosaurus c. plesiosaurus d. brontosaurus

2007-10-14 19:42:35 · 5 answers · asked by maysie_dj18 1 in Earth Sciences & Geology

I have no idea what in the world I'm doing.
I've missed math twice during the lecture on this, so I'm confused as to what I'm supposed to be looking for, since the book barely gives an explanation.

Somehow this: x^3-x^2+x-1 = (x-1)(x-i)(x+i)

I really want to know the whole process as to how to go about this. I've looked up and down this website already, and I see everything about roots. Would I need to find the roots to factor these?

Here are two problems from my homework that I must factor:

x^2+x+2

x^3+6x^2+11x+6

I don't even know where to start. :(
Someone please help me and guide me through this process. I have a test over this at the end of the week, and I really want to know how to do this.

Thank you soo much. :]
...If someone helps me. :(

2007-10-14 19:42:34 · 6 answers · asked by tovtovtov 2 in Mathematics

find the equation of the line that passes through th points (-2,-4) and (2,-1)

2007-10-14 19:39:36 · 8 answers · asked by carlos t 1 in Mathematics

half angle.

2007-10-14 19:36:29 · 3 answers · asked by candy 3 in Mathematics

you know the one with the 3 dots like a pyramid........

2007-10-14 19:36:03 · 2 answers · asked by Anonymous in Mathematics

Two consecutive positive integers have a product of 7832. Find the numbers.

2007-10-14 19:31:34 · 7 answers · asked by Anonymous in Mathematics

Is there a good psychic medium on here that can talk to the dead? I don't want to have to tell you anything personal (ex. name, how they died, relationship) because I've been watching John Edwards & all my friends call him real, but Google calls him a scammer. If anyone can give me a medium reading please reply.

2007-10-14 19:27:43 · 6 answers · asked by Anonymous in Paranormal Phenomena

do not use caculus to solve, and what values of a and b give the maximum product.

2007-10-14 19:25:35 · 7 answers · asked by ac213 1 in Mathematics

2007-10-14 19:23:23 · 1 answers · asked by aviator 1 in Mathematics