Science & Mathematics - 13 December 2007

Calculate the work done on the mass.
Calculate the power developed.

2007-12-13 08:04:56 · 3 answers · asked by Anonymous in Physics

2007-12-13 08:04:52 · 4 answers · asked by Jagtar S 1 in Earth Sciences & Geology

1. What is the axis of symmetry of a parabola with the equation:
Y=X^2 + 2X - 15

2. what is the solution of: 1/8(x - 3)^2=5

Thanks

2007-12-13 08:04:29 · 2 answers · asked by Ashers 1 in Mathematics

We were having philosophical discussions and i raised the question. Now I'm the one who has to look for it. No crap answers please be scientific.

Also, please include your reference(if ya got one)

2007-12-13 08:00:55 · 6 answers · asked by Anonymous in Earth Sciences & Geology

2007-12-13 08:00:12 · 5 answers · asked by rocker23 1 in Chemistry

Is there any mathematical equation that can help me in solving this question?

2007-12-13 07:59:32 · 10 answers · asked by ? 6 in Mathematics

How much work is needed to move a 150 kg refrigerator to the 3rd floor

2007-12-13 07:57:42 · 3 answers · asked by Anonymous in Physics

Which person does more work? Which person produces more power?

2007-12-13 07:54:48 · 2 answers · asked by Anonymous in Physics

I am doing homework and I can't figure these last three problems out:

4r^4w^2 + 9r^2w^6 -r^6w^2

(would that one be: 3r^6w^2 + 9rw^6)?

t^-5(t^2 - t^4 + 5t)


and, the worst one:

[x^(7y+1)]/ [ x^(7y-5)]

any help would be appreciated

2007-12-13 07:53:21 · 2 answers · asked by nfcu016 3 in Mathematics

what is the max height reached by the projectile and how long will it stay in the air

2007-12-13 07:51:08 · 1 answers · asked by MeDIGURU 1 in Physics

what are the common signs that there is a ghost nearby?

Whenever I feel alone in a house or building, I get the strangest sensation something is watching over my back - the hairs on the back of my neck stands up!!

2007-12-13 07:49:31 · 15 answers · asked by mitchchan 5 in Paranormal Phenomena

okay so,
just a quick question.

i am doing an experiment to see how long trypsin and amylase break down compunds.

but how would i know when its finished breaking it down.
do i add iodine? and if so what would i see?

please help im so confused and its important.

THANKSSS :D x

2007-12-13 07:47:14 · 3 answers · asked by Carpe Diem 3 in Chemistry

what is a good site to find out more info on this topic

2007-12-13 07:47:03 · 9 answers · asked by GoBoSox 2 in Astronomy & Space

Good ones please?

2007-12-13 07:45:13 · 8 answers · asked by Jeffrey N 1 in Chemistry

How do bacteria cells function without a nucleus?

2007-12-13 07:44:48 · 2 answers · asked by Itachi Uchiha shall rule!! 1 in Biology

Hey, I need help with 2 problems. The teacher does not teach very well and basically I am trying to learn off the book which is very hard to comprehend. Thanks for your help.

1. An object is hung from a spring balance attached to the ceiling of an elevator. The balance reads F1 = 12N when the elevator is accelerating upward, and reads F2 = 8N when it is accelerating downward with acceleration of the same magnitude a. Find the mass of this object and magnitude of acceleration a. We assume that gravitational acceleration g i known.

2. Darlene the daring, a famous western stuntwoman, is being dragged along the ground by a rope tied to a horse. If her coefficient of kinetic friction with the ground is 1.3 and her mass is 60kg, how much force must the horse pull with to keep her at a constant speed?

2007-12-13 07:44:25 · 5 answers · asked by Karl 1 in Physics

I know the nucleus splits, and releases neutrons, but what elements are created from the split?

2007-12-13 07:41:44 · 3 answers · asked by iamblagged 2 in Physics

1) drug dosages
2) IV flow rate
3) intake and output.
this is for HOSA, a competitive health competition.
any tips?

2007-12-13 07:40:00 · 2 answers · asked by smartie 2 in Medicine

...Can anyone explain how that type of calculation/measurement works?

2007-12-13 07:39:47 · 3 answers · asked by Anonymous in Chemistry

how do i find the relation of these ordered pairs??? (6,-2) (-3,4) (0,5)???? help! please!

2007-12-13 07:39:27 · 1 answers · asked by Jess <3.?! 2 in Chemistry

pls explain
ty

2007-12-13 07:39:16 · 9 answers · asked by Auntie Marie SueB 3 in Paranormal Phenomena

1. An elevator has a mass of 1400kg. What is the tension in the supporting cable when the elevator traveling down at 10m/s is brought to test in a distance of 40m. (Assume a constant acceleration.)

2. A jet airplane accelerates on the runway at 3.0. It has two engines which exert a total thrust of 3.0 x 10 ^ 5 N. What is the mass of this airplane?

3. Many people are familiar with the face that a rifle recoils when fired. This recoil is the result of action-reaction force pairs. A gunpowerder explosion creates hot gases which expand outward allowing the rifle to push forward on the bullet. Consistent with Newton's third law of motion, the bullet pushes backwards upon the rifle. What is the acceleration of the bullet relative to the recoil of the gun?

2007-12-13 07:38:17 · 1 answers · asked by Karl 1 in Physics

2007-12-13 07:37:07 · 2 answers · asked by pyromaniac2617 2 in Physics

2007-12-13 07:36:37 · 5 answers · asked by Brittney M 1 in Chemistry

Hi,
Basically im trying to find the extinction coefficient of a substance but before i can proceed i need to find the conc in molarity of the substance i used.
Well i used methyl orange (327.33g) and diluted it to a factor of 1:10 with distilled water, i used 2.5mg/l of MO with 22.5 water, i need to find the conc, plaese can any one help a.s.a.p!!!!!!
Thanx

2007-12-13 07:36:21 · 1 answers · asked by Hulk 1 in Chemistry

Well I was just watching "TAPS" and they disprove on some level paranormal activity and/or atleast sometimes 'things don't happen' when they are investigating an area.

But as I watched them probe around the stanley place or hotel where "The Shining" was filmed, some WEIRD things really happened!! Like the shattered glass and closet door opening,ect.

Anyway back to original ques. pls.
Do you know of anyone who's visited there, or spent the night there?
Supposedly Steven King experienced some paranormal phenomena when he was there.

2007-12-13 07:35:15 · 7 answers · asked by Auntie Marie SueB 3 in Paranormal Phenomena

2007-12-13 07:34:58 · 4 answers · asked by pyromaniac2617 2 in Engineering

I just found this question I never got on my test last year... could anyone help explain it to me? I was thinking it had to be 2x/? but what I've tried doesn't work. Thanks in advance.

2007-12-13 07:34:11 · 2 answers · asked by ¿ /\/ 馬 ? 7 in Mathematics

Please explain why the much more complex atom of Hg shows only a few lines more than the simplest atom, hydrogen.

2007-12-13 07:27:55 · 1 answers · asked by Akshata 1 in Chemistry

2007-12-13 07:27:29 · 10 answers · asked by pyromaniac2617 2 in Other - Alternative