Science & Mathematics - 3 September 2007

for for ribosomal rna?

2007-09-03 14:41:34 · 1 answers · asked by Terri L 2 in Biology

Hi, does anyone know how to solve this problem? I would really appreciate it because I'm not sure how to do it.

Simplify: 1 / ( √x - √(x+1)

this sign √ is a square root by the way.
A big thanks to anyone who can help!

2007-09-03 14:37:40 · 6 answers · asked by rst41 2 in Mathematics

For a particular set of measurements it turns out that when the velocity is plotted on the vertical axis, and the acceleration is plotted on the horizontal axis, the result is a straight line. When a "slope triangle" is drawn for these data, it is found that the rise is 2.5 m/s, and the run is 3.2 m/s2. Which of the following is the slope?

Lab help. I have spent an hour on it and I can't figure it out.

These are the possible answers:

1.28 m2/s3
0.781 m2/s3
8.00 s
0.781/s
1.28 s
1.28/s
8.00 m2/s3
0.781 s
8.00/s

2007-09-03 14:36:52 · 2 answers · asked by lstntht 1 in Physics

OK, we know that atoms are made up of electrons, neutrons, and protons. What is the space that the electrons float in? Other than a 'cloud'.

2007-09-03 14:36:34 · 4 answers · asked by homeskoolmama 1 in Physics

Total Internal Reflection

2007-09-03 14:35:55 · 4 answers · asked by Anonymous in Astronomy & Space

My partner and I both think the exact same thing at the same time, it happens quite regularly. we will be sitting there and one of us says for instance," It was Ed" . I turned immediately and said to him, I was just about to say the same thing to you.
What does this mean?? is it a soul mate connection?? or something deeper???

2007-09-03 14:34:26 · 8 answers · asked by Anonymous in Other - Alternative

It was late at night and my bf was trying to call me, but I didn;t hear my phone, so he had the downstairs people come bang on the door, but I didn;t hear that either. A minute after they quit, he called again and I heard it and he asked why I didn;t wake up or something and I said I didn;t even know, but I just had a dream that someone was banging on the dorr and I opened it and they tried to come in and I called the police, but that really didn't happen though, but I dreamt that while they were banging on the door. So, what exactly cause this and why? I mean, I dreamt what was happening kinda of with a twist of calling the cops. What causes this and why? Has this happened to you?

2007-09-03 14:32:38 · 3 answers · asked by RearFace@18mo. 6 in Other - Science

I cannot figure out how to do mixture problems for the life of me. I could really use some help and explanation of how to do them. Thanks!

A bottle contains 750ml of fruit punch with a concentration of 50% pure fruit juice. Jill drinks 100ml of the punch and then refills the bottle with an equal amount of a cheaper brand of punch. If the concentration of juice in the bottle is now reduced to 48%, what was the concentration in the punch that Jill added?

2007-09-03 14:31:58 · 8 answers · asked by keith c 1 in Mathematics

I read on a website that it was because of heavy elements that are formed in the sun near the end of its life cycle. But our sun is to young to do this.

2007-09-03 14:30:57 · 10 answers · asked by tjtfgjnf hddd 1 in Astronomy & Space

2007-09-03 14:30:51 · 6 answers · asked by GomerPyle 1 in Astronomy & Space

2007-09-03 14:29:31 · 10 answers · asked by Anonymous in Engineering

I am trying to find an equation for the time it takes for a transverse wave to travel from one end to the other of a string with two fixed points.

The known values are Tension (T), mass of string (m), lenghth of string (L), and wave speed (v).

thanks for the help anyone

2007-09-03 14:29:16 · 2 answers · asked by snoboarder2k6 3 in Physics

2007-09-03 14:26:17 · 2 answers · asked by Compromise it will ya pls? :) 1 in Medicine

I need the list of the equipment which is used by astronauts and space scientists to test which gases are present in the atmosphere of mars.

2007-09-03 14:25:11 · 4 answers · asked by Anonymous in Astronomy & Space

2007-09-03 14:23:25 · 13 answers · asked by Anonymous in Agriculture

2007-09-03 14:19:30 · 5 answers · asked by Anonymous in Physics

2007-09-03 14:18:13 · 3 answers · asked by Anonymous in Mathematics

The density of iron is 7.87 g/mL . What is the mass of a 3.00 cm * 4.00 cm * 1.00 cm block of iron?
Express your answer in grams and show your work.

2007-09-03 14:14:06 · 3 answers · asked by Cindie lou 1 in Mathematics

I have 2 topics, but am not sure which to use. Please tell me what u think. If u have any other possible topic ideas, i'd love it if you'd share. Thanks.

#1. What characteristics in animals prove they were created rather than they evolved?

#2. How does the unique design of humans and animals rule out the idea that everything evolved from a common ancestor?

2007-09-03 14:10:35 · 11 answers · asked by Mel 2 in Biology

2007-09-03 14:05:59 · 6 answers · asked by Anonymous in Mathematics

I am in organic chemistry and we are learning about SP hybridization. I thought I understood it but my professor is talking about different bonds. ie. sigma and pi bonds...

So, can anyone help me understand SP hybridization and how to know when something is SP or SP2 or SP3 hybridized.

thanks...

2007-09-03 14:05:01 · 1 answers · asked by anion 3 in Chemistry

How do you do this problem? I usually don't like asking for homework help here, but I just have no idea how to approach this problem since I never learned how to do it.

2007-09-03 14:01:53 · 3 answers · asked by KM 2 in Mathematics

i cannot find anything in my book about it when i think it should!

2007-09-03 13:59:10 · 6 answers · asked by Hayley B 2 in Earth Sciences & Geology

in mechanical engineering

2007-09-03 13:59:00 · 1 answers · asked by Mark 1 in Engineering

I need to know more about the exams used to measure Vitamind D levels. What are they called, how exactly do they work, their costs, their accuracy, etc.

I basically need to know everything you can tell me related exams and laboratory tests involving Vitamin D.

2007-09-03 13:56:20 · 2 answers · asked by cactuar2k 3 in Medicine

2007-09-03 13:55:59 · 7 answers · asked by Domina 1 in Astronomy & Space

Suppose that a large mixing tank initially holds 300 gallons of water in which 50 pounds of salt have been dissolved. Another brine solution is pumped into the tank at a rate of 3 gal/min, and when the solution is well stirred, it is then pumped out at a Slower Rate of 2 gal/min. If the concentration of the solution entering is 2lb/gal, determine a differential equation for the amount of salt A(t) in the tank at time t.

2007-09-03 13:52:42 · 1 answers · asked by rika 3 in Physics

2007-09-03 13:50:42 · 6 answers · asked by Stacie A 1 in Astronomy & Space

2007-09-03 13:50:30 · 4 answers · asked by njtea5 1 in Mathematics

#1 (cosx/1-tanx) + (sinx/1-cotx)= sinx+cosx
#2 (cosx/secx-1) - (cosx/tan^2x) = cot^2x

2007-09-03 13:48:52 · 4 answers · asked by Anonymous in Mathematics