Science & Mathematics - 15 February 2007

Only one of my grandparents have blue eyes.

2007-02-15 17:35:24 · 8 answers · asked by Anonymous in Medicine

How do you calculate error in an angle of incidence angle of refraction question?

2007-02-15 17:29:42 · 2 answers · asked by Anonymous in Physics

The reaction below is first order in COCl2 with a rate constant of 0.045sec-1 .
COCl2(g) => CO(g) + Cl2(g)
How long will it take, in seconds, for 65.4% of the original sample to react?

My answer sheet says that the equation I'm supposed to use is:

ln [ ]time / [ ] initial = -kt

But in class, I was told my equation for a 1st order reaction should be:

ln [ ]time = -kt + ln [ ]initial

Are these the same thing??? And how can this be? I don't remember the rules of logs, especially natural logs.

2007-02-15 17:29:29 · 2 answers · asked by Spencer S 2 in Chemistry

2007-02-15 17:29:21 · 4 answers · asked by mistyblue0080 1 in Medicine

A: f(x+h)

B: f(x+h)-f(x) / h

Been stuck on these for an hour. Any help would be great. :)

2007-02-15 17:29:20 · 4 answers · asked by Inquisitive Mind 4 in Mathematics

During the prehistoric days, particularly during the days of larger dinosaurs, it seems there was a large amount of biomass on this planet. In comparison, it seems impossible for such large creatures to survive in modern times b/c there isn't enough food for them to survive. Besides habitat destruction, where did the biomass disappear to? Could it have all turned into fossil fuels? And if so, will it ever reenter the bio-cycle?

2007-02-15 17:28:36 · 2 answers · asked by DiggyK 2 in Biology

A guy said “I was 18yrs old 2 days ago and next year I’ll be 21”.

Question: When is the birthday of the guy and the date when the statement made?

2007-02-15 17:27:03 · 2 answers · asked by erick a 1 in Other - Science

well im alergic to penicillin and my doctor gave me CEFUROXIME. well like 3 days ago when i got ready to take the medicine called CEFUROXIME it a type of penicillin . i read the CAUTIONS on the paper and it said it has what im allergic to in it. i contacted the pharmacy today and they told me it would be okay to take the medicne even though it would kill me or do damage. well i smelled the medicine yesturday and every since i did that i been very sick and i cant feel my legs hardly,my body feels very heavy,and im havin a lil trouble with breathing.should i contact a doctor or go get medical attention???????????? i have also had a fever and dizzyness. i know i should have smelled it but when i took the top off the smell was very strong and it hit me in the face. so i need advice please???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????

2007-02-15 17:26:07 · 10 answers · asked by *babygirl* 1 in Medicine

2007-02-15 17:24:51 · 2 answers · asked by latina 1 in Biology

2007-02-15 17:22:02 · 2 answers · asked by Anonymous in Biology

I want to either be on a news station giving forecasts, the one flying in a storm plane over the hurricane to get the pressure and all the other good stuff, work in the National Weather Center, or report from areas in the pathway of storms...not tornado chasers though. What will I have to major in? Meteorology and Telecommunications (news)? or just meteorology or combined with something else?

2007-02-15 17:18:02 · 9 answers · asked by water lily 3 in Weather

Say you know the ppm and you want to convert to a percentage, what conversion factor would you use?

Also, from ppb to percent.

Thanks in advance!

2007-02-15 17:16:47 · 5 answers · asked by Arnold 4 in Chemistry

I had heard that it is in U.S.A. and probably related to aliens.

2007-02-15 17:16:41 · 9 answers · asked by Honey 2 in Astronomy & Space

f(x1,x2)= exp(a(x1-x2))+ 2(x1)^2+2x1x2+b(x2)^2

2007-02-15 17:15:26 · 3 answers · asked by superfly 1 in Mathematics

1)In how many ways can a 10-question true-false exam be answered? (Assume that no questions are omitted)

2)Four people are taking a long trip in a 4-seat car. 3 of the people agree to share the driving. In how many different arrangements can the 4 people sit?

3)How many 3-digit #s can be formed under each condition?
(a)the leading digit cannot be zero
(b)the leading digit cannot be zero and no repetition of the digit is allowed.
(c)the leading digit cannot be zero and the # must be a multiple of 5.
(d)the # is at least 400

2007-02-15 17:11:07 · 5 answers · asked by Anonymous in Mathematics

Please give me the website or sources you got them! Thanks

2007-02-15 17:08:25 · 2 answers · asked by Anonymous in Earth Sciences & Geology

2007-02-15 17:04:23 · 16 answers · asked by Anonymous in Mathematics

i see them all the time when their are leaves on the ground and it is kinda windy outside. what is that called.

2007-02-15 17:03:14 · 8 answers · asked by bkern 3 in Weather

please help me is for my lab

2007-02-15 17:01:36 · 3 answers · asked by kenny b 1 in Chemistry

2007-02-15 17:01:19 · 6 answers · asked by Lasaire 1 in Physics

What is the capital of the state that shares its long southern border with Nevada?

2007-02-15 17:00:44 · 6 answers · asked by Anonymous in Geography

2007-02-15 16:59:43 · 6 answers · asked by Anonymous in Mathematics

2007-02-15 16:58:42 · 16 answers · asked by ultravezz 2 in Mathematics

Thank you in advance for the help.

2007-02-15 16:57:59 · 2 answers · asked by Random G 3 in Chemistry

A charge of 2.9 nC and a charge of 4.6 nC are separated by 40.0 cm. Find the equilibrium position for a -6 nC charge in meters.
___m (from the 2.9 nC charge)

2007-02-15 16:55:48 · 1 answers · asked by Fanjame 1 in Physics

Is the state of Mississippi east or west of the Mississippi River?

2007-02-15 16:55:44 · 5 answers · asked by Anonymous in Geography

2007-02-15 16:55:27 · 6 answers · asked by Anonymous in Medicine

How does interference work if theres only one slit? In diffraction, how come there are black spaces in between the line?

2007-02-15 16:55:16 · 3 answers · asked by Kyu 1 in Physics

In a certain state the automobile license plates consist of two letters followed by a four-digit number. To avoid confusion between "O" and "zero" and "I" and "one" the letters "O" and "I" are not used. How many distinct license plate mymbers can be formed?

This problem deals with nCr and nPr can you please show me how to do it i don't want just the answer i need to understand how to do it. Thanks

2007-02-15 16:54:36 · 4 answers · asked by elizabeth g 2 in Mathematics

2007-02-15 16:53:46 · 6 answers · asked by alone 2 in Astronomy & Space