Science & Mathematics - 31 December 2006

(a) 0.85
(b) 1.2
(c) 1.8
(d) 2.0

2006-12-31 07:19:11 · 4 answers · asked by Martin 2 in Engineering

2006-12-31 07:13:56 · 14 answers · asked by forcedprogress 2 in Physics

2006-12-31 07:13:54 · 2 answers · asked by Beatled 1 in Biology

How come you can't look at the sun when it's high in the sky without enduring a lot of pain in your eyes, but you CAN look at a sunset...it's not really painful. Why is that?

2006-12-31 07:13:28 · 5 answers · asked by Carissa C. 2 in Other - Science

I keep getting -2/7 and I don't know what else I am supposed to be doing


thank you

2006-12-31 07:09:55 · 6 answers · asked by emerydrame 1 in Mathematics

i'm doing a science project and i need visual aides.

2006-12-31 07:04:32 · 7 answers · asked by lauren j 1 in Biology

which element may react chemically by losing electrons from both s and d sublevels?
1.Cl
2.Fe
3.Al
4.Be

2006-12-31 07:02:58 · 6 answers · asked by Jesse C 2 in Chemistry

2006-12-31 07:02:31 · 6 answers · asked by Mizz Smarty Pantz 1 in Mathematics

A--- a recrd store is having a sale during wich all items will be sold at 25% less than their marked price . how much will a CD marked at $16 sell for ?
ok i kinda understand this question alittle bit and am not sure if this question has 1 step or two stpes


B---eric invested $5000 dollars in the stock market . the value of his stock increased by 13%.
a- what is the amount earned from this investment?i already know this answer it 5000 times .13 = 650.00 but the problem is this questin--
b-what is the new value of the stock this step that i dont no how to solve

C-express the % as a fraction with 100 as its denominator
a-40/100
b-55/100
c-62 and one half over 100

D-express the fraction as a percentage
a-3/5
b-29/40
c-5/4
and please please please show me how you solved them thank you soooooooooooooooooooo much for your help

2006-12-31 07:02:04 · 10 answers · asked by Naley~ 1 in Mathematics

I would like to use some small DC motors to turn a gear. I have noticed there are some different ways to attach a gear, such as a c-clamp. I am not really familiar with doing this, so I want to try to find the best way to do it generically, I am working with a lot of surplus parts.

2006-12-31 07:01:14 · 5 answers · asked by contacttodd 2 in Engineering

one theory is that there is life out there billions of lightyears away, that have amazing things that can make u live forever etc, and god put them so far so we could never ever get to them because that wasnt the plan he had to us humans.

theres been alot of things on E.T stuff, like humans and cows with just thier reproductive organs missing...like they were never there or something like that,


what do you think? and please no offensive/rude/pointless material.
thanks!

2006-12-31 06:58:15 · 17 answers · asked by Anonymous in Astronomy & Space

(a) transient over voltages
(b) a power factor of less than 0.85
(c) fluctuating protective conductor currents
(d) heavy starting currents

2006-12-31 06:58:00 · 3 answers · asked by Martin 2 in Physics

2006-12-31 06:55:59 · 21 answers · asked by Joseph M 1 in Mathematics

I have a question that I do not how to solve it even with the answer from the solution manual. Can someone please explain to me on how to solve it. Thank You. (Happy New Year!)

Q: An iron ore sample is dissolved in acid and the iron is obtained as Fe2+, which is analyzed by a titration with KMnO4. The titration reaction is:

5Fe^2+ + MnO4^- + 8H^+ ---> 5Fe^3+ + Mn^2+ + 4H2O

It is found that 24.00 ml of 0.0200 M KMnO4 solution is required to react with all the iron in a sample of ore weighing 0.4. What is the percent of iron in the ore?

A: 33.5%

2006-12-31 06:54:25 · 4 answers · asked by asidy 1 in Chemistry

Assuming that the demand for a product is constant, find the Economic Order Quantity (EOQ) AND the Total Annual Inventory Cost given the following: A). Demand=330 per month. Order Costs= $30 per order. Stock Holding Costs= $10 per item per year. Unit Price= $150. B). Demand= 200 per week. Order Costs= $25 per order. Stock Holding Costs= 10% of average stock value per year. Unit Price= $36. C). Demand= 400 per day. Order Costs= $50 per order. Stock Holding Costs= $45 per 100 items per month (30 days). Unit Price= $99.
MUST Show ALL formulas, equations, computations (etc).

2006-12-31 06:52:57 · 2 answers · asked by chrismosquera 1 in Mathematics

2006-12-31 06:50:44 · 9 answers · asked by stuntowns7 1 in Biology

(a) possibly vertical falling drops of water or
(b) low ambient temperature or
(c) severe mechanical vibration or
(d) high ambient temperature

2006-12-31 06:48:47 · 6 answers · asked by Martin 2 in Physics

people tell me to imagine it as a ball. but what if it is not?

2006-12-31 06:48:32 · 11 answers · asked by leo 1 in Astronomy & Space

i know it is strange but i was looking into my girlfriends eyes and they moved together at the same speed and in the same place if we had to build a model of the eyes we would have to connect them somehow

2006-12-31 06:48:22 · 13 answers · asked by tank 1 in Biology

We have the intelligence to fix it. WE created the INTERNET, WE created NUCLEAR BOMBS(though not for good), WE created
COMPUTERS, CARS, ELECTRICITY, REMOTE CONTROLS, TV's, RADIO, so why can't we fix global warming? Or are we just not trying hard enough? Or are we lazy, ingnorant, fools? I think we have the
intelligence to fix it. I just think the government needs to step up to
the plate and FIX GLOBAL WARMING! WE know the CAUSE. WE
know WHY it's happening. WE know the danger. So, WHY
WON'T WE FIX IT?

2006-12-31 06:47:53 · 22 answers · asked by Jkstr 2 in Earth Sciences & Geology

2006-12-31 06:47:17 · 21 answers · asked by maulipatel96 2 in Physics

I haven't the foggiest idea how to even START this problem. You don't necessarily have to give me the answer, but could you maybe walk me through how I would go about solving it?

"A plane flies 600 miles with a tail wind in 2 hours. It takes the same plane 4 hours to fly the 600 miles when flying against the wind. What is the plane’s speed in still air?"

2006-12-31 06:42:12 · 11 answers · asked by Aliza, Queen of the Night 3 in Mathematics

It has an odd shaped V at the bottom

2006-12-31 06:39:06 · 8 answers · asked by Anonymous in Medicine

I have a question that I do not how to solve it even with the answer from the solution manual. Can someone please explain to me on how to solve it. Thank You. (Happy New Year!)

Q: A 2.00 g mixture of Fe2O3 and impurities having no iron, is analyed as containing 1.25 g of Fe. What is the percent of Fe2O3 in the mixture?
A: 89.3%

2006-12-31 06:37:50 · 1 answers · asked by AUNIDLY 1 in Chemistry

**Help me with these word problems they must be answered using equations.**

Sunset rents an SUV at $21.95 plus $0.23 per mile. Sunrise rents the same vehicle for $24.95 plus $0.19 per mile. For what mileage is the cost the same?

Six pears and three apples cost $3.90. Two pears and five apples cost $3.30. How much does one pear cost?

Two cars leave town going opposite directions. One car is traveling 55 mph, and the other is traveling 65 mph How long will it take before they are 180 miles apart?

A kayaker paddled 2 hours with a 6 mph current in a river. The return trip against the same current took 3 hours. Find the speed the kayaker would make in still water

Your piggy bank has 25 coins in it; some are quarters and some are nickels. You have $3.45. How many nickels do you have?

There were 1500 people at a high school football game. Student tickets were $2.00 and adult tickets were $3.50. The total receipts for the game were $3825. How many students bought tickets?

2006-12-31 06:37:42 · 8 answers · asked by Brad 1 in Mathematics

2006-12-31 06:36:41 · 7 answers · asked by dkp2k2 2 in Chemistry

2006-12-31 06:36:38 · 5 answers · asked by ♥me 4 eva♥ 2 in Chemistry

do I use the formula m=y v2-y v1/ x v2 -x v1 how do I know that they are parallel?????



how would I find the slope of the perpendicular lines to the points of (-7,6) and (2,3)

2006-12-31 06:33:46 · 10 answers · asked by emerydrame 1 in Mathematics

2006-12-31 06:31:30 · 17 answers · asked by VICTORIA S 1 in Mathematics

By pH levels of water I mean acid (under 7), neutral (7), and base (above 7). I am doing a science project and I really need help!

2006-12-31 06:27:06 · 4 answers · asked by ♥me 4 eva♥ 2 in Chemistry