Science & Mathematics - 20 November 2006

2006-11-20 13:21:14 · 2 answers · asked by Nicole 5 in Earth Sciences & Geology

2006-11-20 13:19:52 · 3 answers · asked by raymond h 1 in Earth Sciences & Geology

I am doing a calculation on equivalent resistance of a parallel circuit:

(1/nΩ) means 1 over nΩ
(Req) means Equivalent Value

R1 =6
R2 =6 Ω
R3 =6 Ω

1/Req = 1/R1 + 1/R2 + 1/R3
1/Req = 1/R1 + 1/R2 + 1/R3
1/Req = 1/6 Ω + 1/6 Ω + 1/6 Ω
1/Req = 3/6 Ω
1/Req = 1/2 Ω


**After 1/Req = 1/2Ω, I dont know what to do to make the left side: become Req and the right side become just the value of an ohm.**

2006-11-20 13:19:00 · 2 answers · asked by Anonymous in Physics

32 ... 36 ... 9 ... 12 ... 4 ... 6 ... ? ok I see the reduction subtraction pattern -4 ,-3 ,-2~~~~~but how do i know what the next number is?

2006-11-20 13:17:21 · 4 answers · asked by Belinda M 1 in Mathematics

i have...

5x+10 + 7x-14 = -2x

12x-4 = -2x

14x = 4

x = 4/14

x = 2/17

right?

2006-11-20 13:15:22 · 15 answers · asked by sean_mchugh6 3 in Mathematics

can someone explain to me how to solve this

2006-11-20 13:15:20 · 4 answers · asked by Anonymous in Mathematics

I need some help! My teacher said that neon is a noble gas. I don't know what that means. Please help me!

2006-11-20 13:15:06 · 7 answers · asked by Anonymous in Chemistry

ok...one day there was this wierd cylidrical shaped object soaring around the sky looking out of my house, i know it was not a jet or plane because there was no tail of fog or sound at all, even waiting and listening, it was silent. it would appear, and the disappear. It appeared one more time that day, and i havnt seen it since.

it was quite scary.

if anyone has seen this also, please say so

Kiitos
(thank you)

2006-11-20 13:14:02 · 11 answers · asked by xombiecats 2 in Paranormal Phenomena

2006-11-20 13:13:52 · 6 answers · asked by larry g 1 in Astronomy & Space

2006-11-20 13:13:11 · 5 answers · asked by emily m 1 in Mathematics

2006-11-20 13:12:58 · 10 answers · asked by feeling hopeless 1 in Mathematics

science homework...

2006-11-20 13:10:55 · 14 answers · asked by lucky charms ♥ 2 in Biology

im not that smart but i thought that there was a law saying matter can not me created of destroyed so i was wondering how can everything just appear from nothing if matter cannot be created?

2006-11-20 13:10:43 · 4 answers · asked by dark s 1 in Earth Sciences & Geology

basically probability of planet with evolved life

2006-11-20 13:08:12 · 13 answers · asked by pahoney 2 in Astronomy & Space

Line segment PQ has endpoints P(7,11) and Q(15,21) and is the diameter of a circle.

a) Determine the centre of the circle.
I know you use the Midpoint formula for this question.

b) Calculate the radius of the circle to the nearest tenth of a unit.
This is the one that really threw me off. Would you use the distance formula for x1 and x2 & y1 and y2 to figure out the diameter, and then divide by two?

2006-11-20 13:06:54 · 6 answers · asked by astro_dj 2 in Mathematics

I have this HW problem, and it asks "are the following points on a graph collinear?" (in which i got 5 graph points, all of which i needed to plot) but I dunno if the answer is yes or no, cuz i dont know what collinear is

2006-11-20 13:06:18 · 4 answers · asked by woah 2 in Mathematics

not sure how to solve this help please

2006-11-20 13:05:54 · 8 answers · asked by Anonymous in Mathematics

what is standard form?
ALGEBRA!

2006-11-20 13:05:32 · 5 answers · asked by Person 2 in Mathematics

I do not remember this type of sequence from my school days. ---Jim

2006-11-20 13:04:48 · 1 answers · asked by James M 4 in Mathematics

2006-11-20 13:03:49 · 4 answers · asked by tudor l 1 in Astronomy & Space

2006-11-20 13:02:52 · 9 answers · asked by ♪ ♫ ☮ NYbron ☮ ♪ ♫ 6 in Zoology

no styraphaom(however you spell that) and no shoe boxes

2006-11-20 13:02:10 · 3 answers · asked by ~*MICHELLE*~ 1 in Biology

2006-11-20 13:01:31 · 2 answers · asked by DIANA S 1 in Astronomy & Space

Truck brakes can fail if they get too hot. In some mountainous areas, ramps of loose gravel are constructed to stop runaway trucks that have lost their brakes. The combination of a slight upward slope and a large coefficient of friction in the gravel brings the truck safely to a halt. Suppose a gravel ramp slopes upward at 5.0° and the coefficient of friction is 0.48. Use work and energy to find the length of a ramp that will stop a 17,000 kg truck that enters the ramp at 35 m/s (75 mph).

I tried using the 1/2mv^2 + f(dx) = 1/2m(vcos(theta))^2 + mgh and I seem to be getting about 717 meters, which is wrong. I think I am finding dx wrong. How do you calculate dx? Is the equation right in the first place?

Thanks!

2006-11-20 12:59:28 · 1 answers · asked by Anonymous in Physics

2006-11-20 12:58:10 · 7 answers · asked by Anonymous in Mathematics

2006-11-20 12:57:44 · 7 answers · asked by OC2007 2 in Mathematics

If you were traveling at the speed of light, would the light be in front of you, behind you or would there be none at all?

2006-11-20 12:57:25 · 8 answers · asked by Anonymous in Physics

What volume V of helium is needed if a balloon is to just lift a load of 800 kg.? This number includes only the load and the weight of the empty balloon. Note the density of air is 1.29 kg/m cubed and the density of helium is 0.18 kg/m cubed.
Cool if you could include the math as to how you figured this out! Thanks

2006-11-20 12:56:44 · 3 answers · asked by Anonymous in Physics

2006-11-20 12:56:17 · 2 answers · asked by Moore 1 in Mathematics

1) 5=2x+1
x=0

2) 13-x=8
x=5

3) -4-5x=2
x=-1.2

4) 8-3x=-1
x=-3

5) -12=9w-30
x=-2

6) 3/4m=-9
m=.8125

7) -2/5m=-4
m=-/6

8) 0.6b+51=42-1.4b
b=155

2006-11-20 12:54:02 · 13 answers · asked by Anonymous in Mathematics