Science & Mathematics - 1 December 2006

2006-12-01 12:25:28 · 6 answers · asked by Brian S 2 in Weather

A U-tube of constant cross-sectional area, open to the atmosphere, is partially filled with a heavy liquid with density of 9.04 g/cm^3. A light liquid with density 2.01 g/cm^3 is then poured into both arms. If the difference in the height of the heavy liquid is 1.31 cm, determine the value of the difference in height of the light liquid hl (in units of cm).

2006-12-01 12:25:26 · 1 answers · asked by Mariska 2 in Physics

Recently, scientists have claimed a 99.5% homology between the genes of Neanderthal and those of modern humans. However, how close is the homology between different groups of modern humans, for example, comparing me to my brother, or to someone of the same general background (northern European), or to someone of a different background (e.g., Korean or Zulu)?

2006-12-01 12:24:41 · 4 answers · asked by Jerry P 6 in Biology

You are given 12 apparently identical items, one of which is either heavier or lighter than the others whose weights are the same. Using a balance, what is a process you can use that will consistently find the irregular item and also determine whether it is heavier or lighter using the balance only three times?

2006-12-01 12:22:29 · 3 answers · asked by chapstickbomber 2 in Mathematics

2006-12-01 12:19:52 · 4 answers · asked by Anonymous in Engineering

This is 5th grade math.

2006-12-01 12:18:54 · 20 answers · asked by Lou B 4 in Mathematics

2006-12-01 12:17:56 · 6 answers · asked by Anonymous in Engineering

if you look at the spectrum everything is changing places that are cold are getting warmer and places that are warm are cooling down. I have a feeling in some years things will be opposite of that in which they are now. When do you think the world will end?

2006-12-01 12:14:01 · 12 answers · asked by turttlebert 3 in Other - Science

Many experiments have been conducted to try to prove that life could generate spontaneously. One experiment I've heard of is apparently often conducted in classrooms.
This is where a jar is half filled with liquid and a spark is sent through it. This experiment can reproduce the basic building blocks of life. The jar represents the earth,the water is the earth's oceans,the air in the jar the Earth's atmosphere,the spark represents the conditions that made life possible,the basic building blocks of life represent themselves. This seems conclusive that life can generate spontaneously. However,who does the student or scientist conducting the experiment represent? The student had an intelligent purpose in conducting the experiment. Does it not follow that whoever created life would have had an intelligent purpose in doing so?
Is this and the other experiments good for proving evolution? If you have a good argument against any part of this question,give it in a detailed,fair minded way.

2006-12-01 12:13:56 · 3 answers · asked by Anonymous in Other - Science

I need to find all real values of K that will make x^2+2Kx+20 a perfect square?

2006-12-01 12:13:56 · 4 answers · asked by c_eva02 2 in Mathematics

Hormone response elements (HRE) modify gene expression by regulating RNA polymerase binding to the promoter sequence that is found upstream from a structural gene sequence.

true or false

2006-12-01 12:07:52 · 7 answers · asked by R C 2 in Biology

2006-12-01 12:07:03 · 8 answers · asked by baby g 1 in Mathematics

2006-12-01 12:06:52 · 8 answers · asked by Juanita es lo mejor!! 1 in Earth Sciences & Geology

2006-12-01 12:02:52 · 3 answers · asked by Anonymous in Engineering

a. deposition
b.deflation
c. plucking
d. glaciation

2006-12-01 12:00:43 · 9 answers · asked by Anonymous in Earth Sciences & Geology

Hormone response elements (HRE) modify gene expression by regulating RNA polymerase binding to the promoter sequence that is found upstream from a structural gene sequence.

2006-12-01 11:58:37 · 2 answers · asked by R C 2 in Biology

Is DNA evidence alone enough to acquit (innocent) or convict (guilty)?

2006-12-01 11:57:35 · 9 answers · asked by ♫ Think happy thoughts ♪ 3 in Biology

If people are blood relatives, is their DNA similar?

2006-12-01 11:57:10 · 6 answers · asked by ♫ Think happy thoughts ♪ 3 in Biology

x2
g(x)=⌠ dt
------------------
⌡(3+t^4)^(1/2)
tanx
Find the derivatives of the function.

2006-12-01 11:56:26 · 4 answers · asked by wafflehouse 4 in Mathematics

it is:

Mr. West drove his car from home to Chicago at the rate of 40 mph. and returned at a rate of 45 mph. If his time going exceeded his time returning by 30 minutes, find his time going and his time returning.

Time going was ____hours.
Time returning was _____hours.

2006-12-01 11:54:07 · 2 answers · asked by Kristina G 1 in Mathematics

An elevator has a loading capacity of 300% of its mass and weighs 0.5tonnes. When accelerating, the elevator gains its maximum speed of 2m/s in 1.5sec and decelerates with equal parameters. So:

a) What is the tension in each of the 3 ropes when moving the fully occupied elevator up and down?

b) The steel ropes have a dimeter of 2cm and run each over a wheel of 1m radius. What percentage compression and expansion does the wire experience when being moved over the wheel?

2006-12-01 11:53:46 · 3 answers · asked by susiebondi 1 in Physics

2006-12-01 11:51:02 · 4 answers · asked by Anonymous in Engineering

2006-12-01 11:50:04 · 4 answers · asked by Anonymous in Engineering

Find all possible rational roots and all roots--->
Show ALL work, ALL!

2x3-9x2-11x+8=0 (The 3 and 2 on the right of the x's are exponents)

I got that all rational roots are 1/2,1,2,4,8 right?
Now solve for the roots.

2006-12-01 11:48:35 · 4 answers · asked by Anonymous in Mathematics

Please explain why a 2 ton shipp would float but a 2 ton steel ball would sink. I am confused with this and need answers QUICK!!!!!!!!!!!! Please help!

2006-12-01 11:47:17 · 11 answers · asked by Danny ★☮❤ 4 in Other - Science

When seven people whose average mass is 86 kg sit down in a car they find that the car drops 0.98 cm lower on its springs. Then they get out of the car and bounce it up and down. What is the frequency of the cars vibration if its mass (empty) is 3743 kg (in Hz). Acceleration of gravity is 98.8 m/s^2.

2006-12-01 11:46:06 · 1 answers · asked by Dee 4 in Physics

2006-12-01 11:46:05 · 6 answers · asked by angelajunkins 1 in Chemistry

Is water the only substance that occurs naturally on earth as a solid, gas and liquid? Are there others?

2006-12-01 11:43:06 · 5 answers · asked by orrspring 1 in Weather

Yes I would like an answer to thins question...
Why do you think doorknobs are located where they are on a door?
I believe it has to do with being more efficient because on the law of angular momentum. Any thoughts?

-asian_al

2006-12-01 11:41:50 · 6 answers · asked by Anonymous in Physics

sry its al bunched up it wouldnt fit... plz help

2006-12-01 11:40:52 · 4 answers · asked by anonymous 2 in Mathematics