Science & Mathematics - 3 October 2007

How does evolution deal with the origin of life?

I already know the answer but please explain it like I didn't.

2007-10-03 14:37:10 · 5 answers · asked by meissen97 6 in Biology

difficult in reading the lcd display
long scan times sometimes miss quickly changing signals.
number flickering in the presenceof motors or relay
large battery drainage to power display elements

2007-10-03 14:30:51 · 4 answers · asked by Anonymous in Engineering

What are the characterisitcs of waxed paper that make it adhesive to water? Why is it more adhesive than regular paper?

2007-10-03 14:29:43 · 1 answers · asked by Anonymous in Other - Science

2007-10-03 14:29:22 · 11 answers · asked by lachulablanca 3 in Other - Science

Please explain. Your help is greatly appreciated.

2007-10-03 14:28:04 · 5 answers · asked by koolkid23 2 in Physics

A long, straight wire carrying a current of 959 A is placed in a uniform magnetic field whose magnitude is 8.76x10-3 T. The wire is perpendicular to the field. Find a point in space where the net magnetic field is zero. Locate this point by specifying its perpendicular distance from the wire.

Not sure what equation to use.

2007-10-03 14:27:56 · 1 answers · asked by Jeff T 1 in Physics

Two circular loops of wire, each containing a single turn, have the same radius of 9.71 cm and a common center. The planes of the loops are perpendicular. each carries a current of 6.84 A. What is the magnitude of the net magnetic field at the common center?

Lost, any help would be appreciated. Thanks

2007-10-03 14:25:50 · 2 answers · asked by Jeff T 1 in Physics

2007-10-03 14:25:45 · 6 answers · asked by Anonymous in Other - Science

okay even my math teacher cant explain to me how a negative multiplied by a negative equals a positive

can anyone make real sense of that?

2007-10-03 14:25:38 · 13 answers · asked by Anonymous in Mathematics

1. At what horizontal velocity would a satellite have to be launched from the top of Mt. Everest to be placed in a circular orbit around the Earth?

=.............m/s

2. During an Apollo lunar landing mission, the command module continued to orbit the Moon at an altitude of about 148 km. How long did it take to go around the Moon once?
=.........s

3. What is the distance from the Earth's center to a point outside the Earth where the gravitational acceleration due to the Earth is 1/38 of its value at the Earth's surface?
=.............m

2007-10-03 14:24:39 · 2 answers · asked by Nikita 1 in Physics

2007-10-03 14:24:32 · 6 answers · asked by o0lilazndemon0o 3 in Biology

wat do u want i dont kno this stuff

2007-10-03 14:22:10 · 4 answers · asked by Anonymous in Other - Science

A car is traveling at 58.0 km/h on a flat highway. If the coefficient of friction between road and tires on a rainy day is 0.100, what is the minimum distance in which the car will stop?

I thought i needed mass to find the coefficient, but the problem doesn't give it...

2007-10-03 14:19:32 · 1 answers · asked by BMac 3 in Physics

1.Squirrels abound on campus and off. We have gray, red and black in the Hamilton area. Which two of the three can mate and produce viable young?
2.Why do we find the red-backed salamander under logs at the floor of cuts or valleys?

2007-10-03 14:17:21 · 2 answers · asked by Anonymous in Zoology

Hey, I'm really confused, the question is for a grade and the teacher didn't show how to explain it, anyone know how to solve it? and explain it? to help me out? Please and thanks... ALOT!

2007-10-03 14:13:46 · 2 answers · asked by BahamaBabi 1 in Other - Science

Its my sons homework it says
First:hold your arms and left foot close to your body.
Second: Spread your arms and your feet out as wide as you can
With this evidence explain how a tyrannosaurus rex's tail helped it balance

2007-10-03 14:12:38 · 3 answers · asked by unknown 4 in Zoology

The pH of white vinegar solution is 2.45. This vinegar is an aqueous solution of acetic acid with a density of 1.09 g/mL. What is the mass percentage of acetic acid in the solution?

Can someone explain the process of determining the answer - I don't know where to start. How do I solve it? Hint: The answer is 4.1%.

2007-10-03 14:06:26 · 2 answers · asked by genchem06 1 in Chemistry

I need to explain inferences about the Earth's core for a science project, & i need help, so please help me. (:

2007-10-03 14:02:17 · 2 answers · asked by Melody 1 in Earth Sciences & Geology

or can they? it was a question on my functions test that i didnt get...

explain please :)

2007-10-03 14:01:28 · 1 answers · asked by mystery_girl07 2 in Mathematics

A 6g bullet is fired horizontally into a 2.8 kg block resting on a horizontal surface with a coefficient of friction of .3. When the bullet comes to rest in the block, the block has slid .65m. What is the velocity of the bullet?

the answer is 915 m/s but i don't know how to solve the problem.

2007-10-03 13:59:57 · 2 answers · asked by Pife 2 in Physics

2007-10-03 13:55:09 · 2 answers · asked by Anonymous in Chemistry

Why does x^0 equal one? My math teacher said something about dividing exponents(subtracting)

2007-10-03 13:54:34 · 10 answers · asked by yellowducks 1 in Mathematics

OK, then, how long is the year used for this measurement? 365 days? 365.25 days? Or, is it the exact time for one revolution of the Earth around the sun, and if so, how long is that?

2007-10-03 13:49:30 · 5 answers · asked by Anonymous in Astronomy & Space

2007-10-03 13:47:56 · 11 answers · asked by Anonymous in Weather

2007-10-03 13:47:54 · 3 answers · asked by Bunner 3 in Biology

2007-10-03 13:46:16 · 9 answers · asked by joseph c 1 in Mathematics

2007-10-03 13:42:29 · 1 answers · asked by mike p 2 in Chemistry

2007-10-03 13:38:45 · 2 answers · asked by Pep C 1 in Mathematics

2007-10-03 13:35:27 · 4 answers · asked by sdsurfachik 1 in Physics

For a simple quadratic equation, let's say in standard for is simply
ax^2+bx+c=0. Why cannot this be rearranged to solve for a, b , or c
when you have 2 values such as "a" and "b", "a" and "c", or "b"
and "c".

Why doesn't the equation hold true when you are trying to rearrange
to solve for missing variables?!

x= -b+- sqrt b^2-4ac / 2a that is for solving x
Why doesn't it hold true if you do the following for other
variables:

To solve for b: b= -ax^2+c / x
To solve for a: bx+c / x^2
to solve for c: c= -ax^2-bx

2007-10-03 13:32:37 · 4 answers · asked by Anonymous in Mathematics