Science & Mathematics - 10 August 2007

A red car is loaded into spring launcher & is launched horizontally. The process is repeated with blue car of greater mass. Both times the spring is compressed the same distance.

which is true?

-the blue has greater KE
-red has greater KE
-both have same KE
-both emerge with same speed
-both have same KE and emerge with same speed

2007-08-10 09:39:23 · 7 answers · asked by bklonging 2 in Physics

2007-08-10 09:37:42 · 2 answers · asked by hottiewhifabody 2 in Earth Sciences & Geology

which one is it im always confused

2007-08-10 09:36:38 · 1 answers · asked by hottiewhifabody 2 in Earth Sciences & Geology

i read the usually YBCO has a high tempereature but YBCO's low temoerature's create great magnatic fields that can reach up to 50 telsa, because tempreture is realated to kinetic energy, ergo, it may conturbute, in the Going Grenn movement, so can it, or not??? and how it is related to resistive magnets, thanks.....

2007-08-10 09:36:27 · 1 answers · asked by Anonymous in Engineering

Do male animals ever mate with other male animals? Or do female mate with females?

2007-08-10 09:34:02 · 7 answers · asked by Anonymous in Zoology

I have to give a 10-15 min teaching demonstration on Monday to my class on this topic and I am not sure what they are asking. Please point me in the right direction.

2007-08-10 09:30:51 · 4 answers · asked by doublel_79 1 in Mathematics

2007-08-10 09:25:50 · 17 answers · asked by Anonymous in Medicine

We're looking to get outside San Jose to watch the Perseids, but not so far as to be prohibitive. Any good ideas on places to go?

2007-08-10 09:24:30 · 2 answers · asked by jessenigmatic 1 in Astronomy & Space

I've heard things about the "moon" had something to do with the "ocean" or something. But I never understood what is the correlation between the moon and the ocean.

2007-08-10 09:22:01 · 6 answers · asked by John 1 in Astronomy & Space

2007-08-10 09:21:53 · 6 answers · asked by jrhudzik 2 in Mathematics

1. A length of wire is cut into five equal pieces. The five pieces are then connected in parallel, with the resulting reistance being 2.00 ohms. WHat was the resistance of the original lenght of wor before it was cut up.

2. An 18.0 ohms, 9.00 ohms and 6.00 ohms resistor are connected in parallel to an emf source. A current of 4.00 A is in the 9.00 ohms resistor.

a. Calculate the equivalnet reistance of the ciruit.
b. What is the potential difference across the source
c. Calculate the current in the other resistors.

2007-08-10 09:15:50 · 4 answers · asked by confused ~ 1 in Physics

2007-08-10 09:10:45 · 13 answers · asked by Anonymous in Astronomy & Space

can some one answe these for me thanks

2007-08-10 09:10:41 · 6 answers · asked by Anonymous in Mathematics

I need to make a rope from 2 single sized bedsheets and a pillowcase. The rope must be strong enough for a 225 lb person to safely decend from a 4 story window to the ground. How many pieces should each bedsheet be torn into in order to make a rope strong enough to hold the person that is decending the rope? I have no room for trial and error. This has to be correct on my first attempt or else the rope will break because it's not strong enough; or the rope will be too short to reach the ground. The rope will only be used once, unless I can figure out a way to get the rope untied from the 4th story window when I'm on the ground.

2007-08-10 08:52:05 · 6 answers · asked by paul67337 7 in Engineering

(x)=-x^3-x^2+2x-8 find f(-1),f(0),f(2)

f(-1)=(-1)63-(-1)^2+2(-1)-8
-3-2+-2-8
answer -15

f(0)^3-(0)^2+2(0)-8
0-0+0-8
answer -8

f(2)^3-(2)^2+2(2)-8
8-4+4-8
answer is 0

2007-08-10 08:51:51 · 4 answers · asked by Anonymous in Mathematics

2007-08-10 08:50:40 · 8 answers · asked by niceguy 2 in Mathematics

number of systems and planets?.....surely there are near endless numbers of planets with life....and we are not entirely unique...

2007-08-10 08:50:30 · 9 answers · asked by amazed we've survived this l 4 in Astronomy & Space

3 rocks of equal mass are thrown with identical speeds are thrown from top of building. X is thrown vertically down, Y is thrown vertically up, Z is thrown horizontally. Assume air resistance is negligible.

2007-08-10 08:49:22 · 12 answers · asked by bklonging 2 in Physics

Find the acute angle A,to the nearest second when:

a. log cos A=9.12575
b.log sin A=9.91655

if you could explain step by step this would be helpful,thank you.

2007-08-10 08:47:43 · 5 answers · asked by Chaz 1 in Mathematics

2007-08-10 08:45:30 · 8 answers · asked by mansur e 1 in Mathematics

Could someone please help me out? I was given the formula:

3 x 10^8 m/sec.

Thanks a lot!

2007-08-10 08:40:32 · 8 answers · asked by Caramel 2 in Astronomy & Space

2007-08-10 08:20:59 · 42 answers · asked by onekmb2003 2 in Biology

Is there any new method available A/C without a compressor ?(solid state technique)What is the merits & demerits?.Cost factor , power consumption factor explain briefly ,I need clear answer pl

2007-08-10 08:18:03 · 16 answers · asked by ricky414 5 in Engineering

it looks like a Dragonfly...but it's not. it had a black body, and possibly what looked like a stinger on it's tail. it's legs looked almost spider like and it appeared to have possibly 6 or 8 legs. it's wings resembled that of a Dragonfly. really creepy looking! my boyfriend said it's a "Flycatcher". does anyone know the correct name for this bug?

2007-08-10 08:09:29 · 5 answers · asked by l33ta66 2 in Zoology

If one were able to remove all friction, save for gravity, needed for the design i have in mind, could the machine work?

If friction is removed entirely, why couldn't it work?

2007-08-10 08:06:38 · 8 answers · asked by Jake 1 in Physics

2007-08-10 08:01:24 · 8 answers · asked by Anonymous in Zoology

ok so i was at a friends house and it was night time.. and there was this giant grey flying animal/insect i dont think it was a bat because of its wingspan and because how fast the things wings moved.. after it got done flying around us it went into a flower the body of it was about 5 to 6 inches

2007-08-10 08:01:21 · 7 answers · asked by Ryan J 1 in Zoology

2007-08-10 07:54:11 · 9 answers · asked by Susan C 2 in Agriculture

2007-08-10 07:41:59 · 2 answers · asked by Anonymous in Medicine

I own one of each. I know how they're different. I am looking for good illustrations to show how they're different on the inside. I will be teaching a bunch of Cub Scouts all about telescopes, the Solar System, and other Astronomy topics. I will show them my reflecting and refracting telescopes, but I'm looking for diagrams to show the internal components, as well.

I looked at the Orion site. They show many examples, but they're external photos. I want to see internal photos, diagrams, illustrations, etc. I'm looking for images that I can download, enlarge and print.

Thank you for providing links.

2007-08-10 07:34:39 · 2 answers · asked by Dave B. 4 in Astronomy & Space