Science & Mathematics - 18 November 2007

2007-11-18 14:54:04 · 3 answers · asked by DeeDee 1 in Chemistry

2007-11-18 14:53:49 · 1 answers · asked by dylan v 1 in Chemistry

A spring has a force constant of 4000 n/m. The spring is initially streched by 2 CM beyond its equilibrium config. Then the spring is compressed until its length is 6 cm less than the relaxed length. What is the net ammount of work done by the spring AND the person moving the spring?

2007-11-18 14:52:19 · 1 answers · asked by Anonymous in Physics

biology experiment

2007-11-18 14:48:09 · 11 answers · asked by dk 1 in Biology

2007-11-18 14:45:30 · 2 answers · asked by Anonymous in Medicine

2007-11-18 14:43:43 · 5 answers · asked by lovinglife244 1 in Astronomy & Space

which of the following towns would be most susceptible to liquefaction: a town on a high mountain, a town built on bedrock, or a town built in a river valley?

2007-11-18 14:43:22 · 2 answers · asked by xXthonyXx 1 in Geography

?

2007-11-18 14:43:07 · 2 answers · asked by ♥...........♥ 5 in Chemistry

do flu vaccines really work?

2007-11-18 14:42:33 · 10 answers · asked by Anonymous in Medicine

2007-11-18 14:41:32 · 3 answers · asked by DeeDee 1 in Chemistry

express this speed in meters per second. fathom is precisely 6 ft
what is this speed in miles per hour?
what is this speed in light year per year?

2007-11-18 14:39:41 · 1 answers · asked by tobi 1 in Physics

?For example, would Jupiter and Saturn combined be enough gas material to form a small, medium, or large size star?

2007-11-18 14:37:03 · 6 answers · asked by zahbudar 6 in Astronomy & Space

1. Is there a safe way to create helium Because- I was wondering like helium in a container size of ur finger if u open the container it has enough helium to fill a balloon .

2. On whopee cushion the bottome part air doesnt come out but you can blow in air. is there a way to that to make it easy to put in air but very hard harder then a whopee cushion to take out the air?

3. On whopee cushion how do they make it so that air goes in but not out?

2007-11-18 14:36:51 · 1 answers · asked by Anonymous in Chemistry

If you put gasoline vapors with the right amount of oxygen in a paper bag will it expolde?

2007-11-18 14:36:00 · 3 answers · asked by christine2550@sbcglobal.net 2 in Other - Science

A beaker contains 190 mL of ethyl alcohol at 23.0 degrees C. What is the minimum amount of energy that must be removed to produce solid ethyl alcohol?

2007-11-18 14:34:10 · 1 answers · asked by Anonymous in Engineering

Biometrics uses biological information to verify identify. The basic idea behind biometrics is that our bodies contain unique properties that can be use to distinguish each of us from all other human beings.discuss the latest technology in identification techniques. how are some related to historical bases?

2007-11-18 14:32:26 · 1 answers · asked by chris l 1 in Other - Science

PLease answer this if you can and tell me step by step how you got it. " The noon sight was taken at 1:15 am GMT. What longitude and direction are you located from the Prime Meridian?"

2007-11-18 14:31:51 · 1 answers · asked by Backoff 2 in Geography

2007-11-18 14:29:59 · 1 answers · asked by stacy g 1 in Engineering

A pendulum clock has a period of 0.690 s on Earth. It is taken to another planet and found to have a period of 0.802 s. The change in the pendulum's length is negligible.

Find the gravitational field strength on the other planet.
____m/s2


I already know that the gravitational strength on the other planet is going to be less than that on earth but i cant figure out what the strength is. Thanx for the help!

2007-11-18 14:29:30 · 1 answers · asked by Anonymous in Physics

2007-11-18 14:23:47 · 1 answers · asked by chrisray 3 in Astronomy & Space

Simple little proof I can't seem to get...

Prove n^21 = n^3 (mod 21) for every integer n.

that "=" sign is the three horizontal line symbol, meaning congruent.

Help please

Thanks.

2007-11-18 14:23:37 · 3 answers · asked by keromon 1 in Mathematics

I need help urgent!!

2007-11-18 14:23:27 · 4 answers · asked by Anonymous in Mathematics

this question has been killing me.

2007-11-18 14:22:58 · 8 answers · asked by Jonathan Markezzi 1 in Astronomy & Space

I don't want you to answer the question, just help me!
1. The speed of light is 3 x 10(to the) 8 (th power~ scientific notation) meters/sec. How long does it take light to travel the 149 x 10 (to the) 9 (th power) meters distance from the sun to the earth?

2. A driver starts his parked car and within 5 seconds reaches a velocity of 54 km/hr as he travels east. What is the acceleration?

thanx!

2007-11-18 14:21:41 · 5 answers · asked by Anonymous in Physics

Please help me to understand this! thanx!

2007-11-18 14:20:48 · 4 answers · asked by Anonymous in Chemistry

If the Sun becomes a red giant that has a radius 100 times larger than its current radius and a luminosity 1000 times its current luminosity, what will its surface temperature be? (Use the Stefan-Boltzmann equation and solve for T).

If we made a model of the Milky Way that had the diameter of the Earth, how big would the Earth itself be in this shrunken model? (Assume that the Milky Way's diameter is 50 kpc for this problem.)

Given that the Sun moves in a circular orbit of radius 8 kiloparsecs around the center of the Milky Way, and its orbital speed is 220 kilometers per second, work out how long it takes the Sun to complete one orbit of the galaxy.

Can you please show your work. Thank you in advance for helpin me :)

2007-11-18 14:20:16 · 3 answers · asked by djstylez1987 1 in Astronomy & Space

In triangle ABC, angle bisectors A,A1 and C,C1intersect at point E. Quadrilateral A1,B,C1,E are cyclic. Find the area of triangle AEC if AE=p and CE=q.

2007-11-18 14:15:44 · 2 answers · asked by Anonymous in Mathematics

this it the third one all do the same thing

2007-11-18 14:12:14 · 6 answers · asked by richard f 2 in Engineering

I suck at conversions.

No, it's not HW. I'm trying to do this dumb experiement for my mom's Girl Scout troop.

Thanks for answering =/

2007-11-18 14:11:46 · 0 answers · asked by Me 7 in Mathematics

consider the following polynomial equation f(x)=3x raised to the 3 -11x raised +2nd power
8x+4
factoered polynomial f(x)=

2007-11-18 14:11:06 · 1 answers · asked by Anonymous in Mathematics