Science & Mathematics - 31 January 2007

2007-01-31 12:58:54 · 126 answers · asked by A True Gentleman 5 in Astronomy & Space

GCF for polynomials... help?!?!?!?
1. 24x^2+20x
2. 15x^3-18x^2-3x
3. -34x^3+102x
4. 119x^3-204x^2-17x

2007-01-31 12:58:53 · 10 answers · asked by katiekcat5 3 in Mathematics

How are islands formed?

2007-01-31 12:58:10 · 5 answers · asked by Anonymous in Earth Sciences & Geology

2007-01-31 12:58:01 · 8 answers · asked by anonymous91 1 in Mathematics

below the water surface, and 1.8 seconds later the reflected signal is detected. how deep is the ocean beneath the ship?

2007-01-31 12:57:24 · 4 answers · asked by bhangra_di_rani2006 1 in Physics

2007-01-31 12:57:12 · 10 answers · asked by ღLala Loveღ 4 in Mathematics

2007-01-31 12:56:22 · 11 answers · asked by krzykrngurlx1st 1 in Geography

1) mm=? cm= 16.5 m=?
2) mm=? cm=? m = 1.651
3) 150 km = mi
4) 12 gal = oz
5) 107 faringet = celcius ?
6)yds = ? cm =? in = ? m = 100 mm =?
7) yds = 60 cm = ? in = ? m =? mm = ?
8) 10 ft2 = in2
9) 15cm2 = m2
10) 3 oz = mm

2007-01-31 12:56:14 · 4 answers · asked by Anonymous in Mathematics

I heard Some scientists were trying to remake the big bang(a huge energy blast), but it was called off because it could make a black hole here on earth. Is this true?

2007-01-31 12:54:40 · 8 answers · asked by Anonymous in Astronomy & Space

2007-01-31 12:54:10 · 10 answers · asked by southernlab_32 1 in Other - Alternative

2007-01-31 12:54:00 · 9 answers · asked by nycznumba1coolguy@yahoo.com 2 in Mathematics

1. 5.75 x 10^24 atoms Al

2. 3.75 x 10^24 molecules CO2

3. 3.58 x 10^23 formula units ZnCl2

4. 2.50 x 10^20 atoms Fe

2007-01-31 12:53:05 · 4 answers · asked by User84 4 in Chemistry

2007-01-31 12:52:49 · 26 answers · asked by Anonymous in Astronomy & Space

2007-01-31 12:52:21 · 5 answers · asked by Rhonda M 2 in Mathematics

2007-01-31 12:52:15 · 9 answers · asked by Anonymous in Zoology

I just bought a large (~4ft.) houseplant that did not come with a tag. It has large, 12in. long leaves that are dark green in the center and light green along the edges. The undersides of the leaves are dark purple. The most interesting feature of the plant is that the leaves move each night from a "floppy" state (floppy like a banana plant) each to straight up. You can actually see and hear the leaves moving from around 6:30pm-10pm. They curl back down every morning. The leave and stem structure looks almost like a huge peace lily plant, but I can't find anything with the purple undersides in that family...

2007-01-31 12:51:13 · 5 answers · asked by kstar 1 in Botany

Can someone please help me solve this integral for Math 222.

the integral of 1/(1+sinx) dx

Thank you so much!

2007-01-31 12:50:56 · 6 answers · asked by kjwilson 1 in Mathematics

2007-01-31 12:50:12 · 5 answers · asked by Zolboo T 1 in Medicine

A series of light pulses, shaped like a cone, subtending an angle θ = 28.0°, is incident on a `light fiber', as illustrated. The time between pulses is measured just outside the left end of the fiber. If the time between the leading edge of one pulse and the trailing edge of the previous pulse is 39.0 ns, determine how long (L) the fiber can be before the two pulses overlap. (Assume that the fiber has an index of refraction, nglass = 1.52, and a diameter, d=1.34×10-4 m.)
http://www.learning.physics.dal.ca/library/Graphics/Gtype73/cone.gif

2007-01-31 12:49:57 · 1 answers · asked by 2 2 1 in Physics

Three friends are on a roadtrip, they stay at this hotel; the guy at the counter says "its 30 bucks for all of you"... the guys don't like the price but pay 10 bucks each. When they go to their rooms, the guy at the counter feels guilty and gives the bellboy 5 bucks as a discount. The bellboy goes with the guys and says "ok here, 1 buck for each of you and I'll keep 2 as the tip".

So each traveler spent 10 bucks minus 1 returned =9
9+9+9=27... plus the 2 bucks of the tip.. 29..
WHERE IS THE LAST DOLLAR?

2007-01-31 12:49:32 · 9 answers · asked by IQ DOSON 2 in Mathematics

(2) 20 cm = ? decimeter
(3) 10 hectometers = ? kilometers
(4) 4 decimeters= ? centimeters
(5) How many inches are in 3 feet?

2007-01-31 12:49:18 · 6 answers · asked by rosemariestewart64 1 in Mathematics

I know how to do it but i dont know how to do it with fractions. like what would i have to do to slove

28=p/7 (p/7 is the fraction. p is the numerator and 7 is the denominater)

2007-01-31 12:48:21 · 7 answers · asked by The REBELution! 3 in Mathematics

If so, what is it called and where can I find information on it?

2007-01-31 12:47:54 · 5 answers · asked by jetsdave92 2 in Astronomy & Space

A car is to make a turn without skidding on an unbanked curve with a radius of 90 meters. If the coefficient of friction is 0.64, what is the maximum speed of the car can have?

2007-01-31 12:47:20 · 3 answers · asked by Anonymous in Physics

2007-01-31 12:47:13 · 6 answers · asked by chichona 1 in Mathematics

2007-01-31 12:46:56 · 2 answers · asked by john c 1 in Biology

Ok. well I want to make sure these are right.

Photosynthetic orgnisms get energy from_____
isnt it light?

For each molecule of glucose entering glycolysis, there is a net gain of
ok this is either six ATP molecules, 4 ATP molecules, 3 ATP molecules, or 2...i don't remember, it's a big process...

Electrons in pigment molecus become excited_______
is it during light-independent reactions...or when light strikes a thylakoid??

ok, that'll be all, i may come back...because i got 6 pages, i've only done 3....thanks!

2007-01-31 12:46:27 · 3 answers · asked by mahbabesgrl 1 in Biology

2007-01-31 12:46:15 · 8 answers · asked by Anonymous in Astronomy & Space

What mass in grams of Na is needed to synthesize 5.05 grams of Na2S from its elements ?

2007-01-31 12:45:40 · 2 answers · asked by Latina129 2 in Chemistry

please look at my lab and tellme what i did wrong because in theory you should have weight of washers= to centripetal Force. Circular Motion Lab

Purpose: The purpose of this lab is to examine the relationship between a centripetal force acting on an object experiencing uniform circular motion, velocity, and its centripetal acceleration.

Data table 1: Circulation Motion of the stopper, washer and time

Mass of the Stopper (Kg) Mass of the Washer (Kg)
.0138.00546


Length (m) Revolutions Number of Washers Time
.50 10204.89
.5010205.50
.5010185.0
.5010184.77
.5010165.91
.5010165.78
.5010145.72
.5010145.69
.5010126.62
.5010126.47











Washer (m) Tangential Vel Centripetal a Centripetal F

20 (.109) Kg

.048 m/s.11.66 m/s .
18 (.098) Kg.0511 m/s.824 m/s.0107 N
16 (.087) Kg.042 m/s.823 m/s.0010 N
14 (.076) Kg.043 m/s.611 m/s .0079 N
12 (.066) Kg .038 m/s.461 m/s.0059 N

Sample Calc: m= .109 Kg
a.Tangetial Velocity V=d/t = .50/5.2=.096 r/s
Vt= r( angular speed)
.50* .096= .048 m/s
Centripetal Accel: Vt^2/R
VT= 2pieR/t= 2*3.14*.50/5.2 s= .606
Centripetal Accel = (.606)^2/.50= .729 m/s
Centripetal Force= FC= mstopper* ac= .729 * .013 Kg


Weight of washers (Force) Percent Difference

2007-01-31 12:44:58 · 3 answers · asked by socom_lover 2 in Mathematics