Science & Mathematics - 14 October 2006

2006-10-14 12:34:17 · 6 answers · asked by allsphears 2 in Physics

please help me, I need to know this for a research report, and I can't find the answer!

2006-10-14 12:32:46 · 8 answers · asked by Anonymous in Physics

The Five Cities that I see being important to the world in 2007 are;

1. New York City
2. Los Angeles
3. Chicago
4. Atlanta
5. Houston

2006-10-14 12:32:19 · 9 answers · asked by Mr. Knowledgeable VI 7 in Geography

For you to think about:

- Say you're in a space shuttle with twin babies. You want to be able to compare the heaviness of these two babies, but all you have is a spring balance. In space, the balance can't be used to measure the weight of anything because you feel as if youre weightless. How then, can you use the spring balance to compare?

- A rope has a 750N tension resistance force. You and friend pull on opposite ends, each with a force of 500N. Will the rope break? (No angle, you're pulling directly opposite from your friend) Why.

2006-10-14 12:29:31 · 3 answers · asked by Silver 2 in Physics

I've noticed that the glare of my computer is quite harsh to the eyes and makes me feel sleepy, but with natural light, i feel happier, almost refreshed

2006-10-14 12:29:01 · 13 answers · asked by naughty boy 1 in Other - Science

i can click a peace of metal and it reacts with the liquid thats in a bag,It heats up .turning the liquid into cristals .i can reset it by bioling it ready to do it again.can you tell me what the substance is please .

2006-10-14 12:28:01 · 3 answers · asked by Anonymous in Chemistry

2006-10-14 12:22:24 · 11 answers · asked by Sarah F 1 in Astronomy & Space

One of life's mysteries I suppose, but I can't help but think there must be.....

2006-10-14 12:14:02 · 39 answers · asked by Lily & Stu Too 5 in Astronomy & Space

It can be cut or ripped, but it cannot have a break in it. I cannot use tape or glue or anything else to put it back together. I cannot use a picture of myself either, it actually has to be me.

2006-10-14 12:11:03 · 7 answers · asked by hazelmonkey17 1 in Other - Science

The cart starts from a point A, which is stationary, and has a height of 24.5m. A while later the cart reaches a point B, which has a height 11.9m. Acceleration of gravity is 9.8m/s^2. What is the potential energy of the cart relatiove to the ground at point A (in units of J)? Also What is the speed of the cart at point B, ignore friction(in m/s)?

2006-10-14 12:09:59 · 3 answers · asked by Anonymous in Physics

Is it necessary to continue stem cell research ?what are the advantages and risks of stem cell research ?

2006-10-14 12:09:39 · 8 answers · asked by menu 1 in Medicine

i really suck at these problems. is there a trick or some kind of way to approach these things?

find the formula (a sub n) for the following sequences:

1. 2, 0, 2, 0, 2...

2. 1/2, 3/4, 7/8, 15/16, 31/32...

3. -1/4, 2/9, -3/16, 4/25, -5/36

sequences can be defined recursively: one or more terms are given explicitly; the remaining ones are then defined interms of their predecessors. give first 6 terms of sequence and then give nth term.

1. a1 = 1; a sub (n+1) = a sub n + 3n(n+1) + 1

2. a1 = 1; a sub (n+1) = 1/2(a sub n) + 1

i dont even know where to begin with these. please help. TIA

2006-10-14 12:05:33 · 5 answers · asked by DoughboyFresh 2 in Mathematics

2006-10-14 12:05:21 · 6 answers · asked by basketballlover@sbcglobal.net 1 in Chemistry

2006-10-14 12:02:49 · 14 answers · asked by naughty boy 1 in Earth Sciences & Geology

so if your one of those people that have nothing better to say than "you have a computer" don't wast my time. but if your a nice person that would like to help me out a little i'm havinmg trouble with finding some stuff. Is seaweed a plant, animal or a protist? and is there even any plants in the sea if seaweed isn't? and is there any bacteria, or fungi in the sea?

Thanx a lot for the help.

2006-10-14 11:57:09 · 4 answers · asked by off_the_wall1991 1 in Biology

a- narrow, critical factor
b-narrow, number of physical factors
c-broad, number of critical factors
d- average , number of physical factors
e- broad, critical factor

2006-10-14 11:55:02 · 4 answers · asked by margaret k 1 in Biology

2006-10-14 11:54:18 · 18 answers · asked by Steph :-) 3 in Physics

A 2.18kg block is pressed against one of the ends of the block of the spring, which compresses the spring 0.101m. After it is released, the block moves 0.287m to the rightbefore it comes to a rest. Acceleration of gravity is 9.8m/s^s. What is the coefficient of kinetic friction between thesurface and the bloce?

2006-10-14 11:53:32 · 4 answers · asked by Anonymous in Physics

(continuing) each containing one mole of water, necessary to cool 500g of liquid water initially at 20 degree to 0 degree?

E.O.F=ethalpy of fusion in the unit of kJ/mol
H.C=heat capacity in the unit of J/mol degree

the answer is 7..but i don't know it is derived..please show me a step by step solution.thank you

2006-10-14 11:50:59 · 1 answers · asked by ichigokun 1 in Chemistry

compounds. The branch of chemistry called organic chemistry is based primarily on the compounds of this element.

2006-10-14 11:50:27 · 9 answers · asked by Jen 1 in Chemistry

Ok, I don't know how to answer this question for chemistry and I don't know how to do the problem...help please?

Strontium-90 has a half-life of 28 years. If a 1.00-mg sample were stored for 112 years, what mass of Sr-90 would remain?

2006-10-14 11:45:00 · 10 answers · asked by naddawannabee 1 in Chemistry

What date has had more people born on it than any other?

2006-10-14 11:44:49 · 6 answers · asked by simonjwhitaker 2 in Other - Science

fill in blank please

2006-10-14 11:40:33 · 5 answers · asked by Anonymous in Other - Science

2006-10-14 11:38:49 · 18 answers · asked by Anonymous in Other - Science

The corresponding atomic radius is 1.566 Å and the density is 6.407 g cm-3. Calculate the atomic mass for this element (in amu).

2006-10-14 11:38:12 · 2 answers · asked by chisha 1 in Chemistry

The coefficient of kinetic friction between the surface of the incline plane and the a 2 kg mass is equal to .7 kinetic friction for another mass connected mass of 3 kg the kinetic friction is .6 (These two masses are connected by a cable) If the two masses are to accelerate at 3.5 m/s^2, in the the upward direction at an angle of 35 degrees from horizontal.

What force is necessary to accomplish this acceleration up the incline plane? If the 2 kg mass starts at the bottom of the incline.

How far up the incline will the masses have moved in 4 seconds?

What will the velocity of the 3 kg mass at 4 seconds be? The cable does not stretch!!

2006-10-14 11:28:04 · 6 answers · asked by Shane W 1 in Physics

2006-10-14 11:24:51 · 30 answers · asked by Anonymous in Physics

2006-10-14 11:24:32 · 13 answers · asked by David R 5 in Physics

2006-10-14 11:23:06 · 15 answers · asked by Kizzy_ 5 in Earth Sciences & Geology

For example - would you die, if so how long? Would you turn orange? Would you gain better eyesight?

2006-10-14 11:20:26 · 33 answers · asked by QEeDe 1 in Biology