Science & Mathematics - 18 December 2007

you can't small cold or warm water but you can smell boiling water, i found this out while i left the hot tap running.

2007-12-18 09:06:15 · 5 answers · asked by Anonymous in Other - Science

It seems like it should be easy, but I can't figure it out. Thanks so much, final is tomorrow.

2007-12-18 09:05:25 · 1 answers · asked by lar285 1 in Chemistry

Alright, I'm having trouble with these two problems. I'm supposed to use the limit form of the derivative to find dy/dx. Simple enough for all of the other problems except these two:

y = √x

and

y = 1 / (x^2)

Any help with these would be greatly appreciated.

2007-12-18 09:05:05 · 2 answers · asked by I Know Nothing 6 in Mathematics

2007-12-18 09:03:59 · 17 answers · asked by theladevans 1 in Zoology

2007-12-18 09:03:45 · 2 answers · asked by robmp12 2 in Mathematics

2x squared + 7x + 5

2007-12-18 09:01:44 · 4 answers · asked by 11:11 3 in Mathematics

2007-12-18 09:01:30 · 7 answers · asked by Anonymous in Mathematics

Would there remain molicules of water between the the wet surface and the persons sole.

2007-12-18 09:01:17 · 3 answers · asked by Riccard P 1 in Physics

two points F and G are the end-points of the base of a triangular flower bed PEG,in which PF=PG=8cm. IF angle FGP =75,calculate the area of the flower bed and the length of FG

2007-12-18 09:00:16 · 2 answers · asked by bubble 1 in Mathematics

the question is:
find a vector whose magnitude is 4 and whose component in the i direction is twice the component in the j direction..
i keep on getting 4/sqrt(3) but the real answer is 4sqrt(5)/5 and i dont get how you get that

2007-12-18 08:59:11 · 3 answers · asked by Anonymous in Mathematics

I do.

lol!

2007-12-18 08:58:52 · 8 answers · asked by Anonymous in Physics

To what temperature must a 350 ml gas sample at 26 C and 101 kPa be heated to increase its pressure to 175 kPa while in the same container.

I need to have this equation put into a formula with an answer, if you can please help me and put an explanation along with it, that would be great!!

I need that asap!! by today

2007-12-18 08:58:21 · 5 answers · asked by Bronco_Fan 1 in Chemistry

a number
not man made

2007-12-18 08:56:19 · 2 answers · asked by nick18cs 2 in Chemistry

Whats the LCm of 12x and 40y
I really dont get this...this problem is not my homework, its an example and i want the answer to see if I can understand it

2007-12-18 08:55:21 · 4 answers · asked by **Silvia** 3 in Mathematics

(sqrt 3 +5) (sqrt 3 -3)

2007-12-18 08:55:02 · 3 answers · asked by God Bless America!~ 4 in Mathematics

thankyou!

2007-12-18 08:53:06 · 2 answers · asked by demarestian 1 in Chemistry

A mix of 2 (for simplicity) liquids at known concentrations is placed into a sealed vial. All physical parameters of liquids are known, e.g. MW, Density, Vapor pressure & any other that might be needed. The volumes of both vial and the mix in it are also know.
After gas-liquid equilibrium is achieved, what are concentrations of the compound in the liquid phase.

I'll appreciate any intermediate answers as well, i.e. #moles of either in either gas or liquid.

2007-12-18 08:53:03 · 1 answers · asked by Alex 4 in Chemistry

4/3 (cos 5pi/4 + i sin 5pi/4)
multiplied by
3 (cos pi/4 + i sin pi/4)

2007-12-18 08:50:02 · 1 answers · asked by snowangels 2 in Mathematics

i need a food web that is of the platypus plz help

2007-12-18 08:49:49 · 2 answers · asked by Anonymous in Zoology

if it is hot and windy outside, what do they measure: wind chill or heat index?

2007-12-18 08:49:20 · 4 answers · asked by Arthur M 1 in Weather

1.) A heavy-duty stapling gun uses a 0.173 kg metal rod that rams against the staple to eject it. The rod is pushed by a stiff spring called a "ram spring" (k = 37479 N/m). The mass of this spring may be ignored. Squeezing the handle of the gun first compresses the ram spring by 3.90*10^-2 m from its unstrained length and then releases it. Assuming that the ram spring is oriented vertically and is still compressed by 6.20*10^-3 m when the downward-moving ram hits the staple, find the speed of the ram at the instant of contact.

2.) A 1.0 kg object is suspended from a vertical spring whose spring constant is 105 N/m. The object is pulled straight down by an additional distance of 0.25 m and released from rest. Find the speed with which the object passes through its original position on the way up.

Not sure how to do these; help would be appreciated.

2007-12-18 08:48:45 · 1 answers · asked by Anonymous in Physics

2007-12-18 08:47:55 · 14 answers · asked by male in the USA 1 in Astronomy & Space

Wouldn't I find the LCD for the 5 and 3?

2007-12-18 08:46:19 · 3 answers · asked by draydaze 2 in Mathematics

What female insect can mate once and be pregnant for the rest of its life?

2007-12-18 08:45:16 · 3 answers · asked by Anonymous in Zoology

When a water gun is fired while being held horizontally at a height of 1.23m above ground level, the water travels a horicontal distance of 1.28m.

The acceleration of gravity is 9.81 m/s2.

A. Find the initial velocity of the water.

A child, who is holding the same gun in a horizontal position, is sliding down a 41º incline at a constant speed of 1.34 m/s. The child fires the gun when it is 1.4 m above the ground and the water takes .451 s to reach the ground.

b. How far will the water travel horizontally?

2007-12-18 08:44:21 · 2 answers · asked by softball_linz_06 1 in Physics

I know they taught me this in Calculus 1 but i flunked for a reason! I actually need this to ship some things (clothes, shoes, stuffed animals,etc.) from the US to my hometown

2007-12-18 08:37:11 · 1 answers · asked by MerryJane 3 in Mathematics

This is what I have: the air above wings travels farther and faster than the air below, the air below wings is denser and pressure is greater, air below wings creates lift

Can someone explain this to me more clearly? I'm reading this and I sort of get it, but I still don't understand why/how..

2007-12-18 08:37:08 · 11 answers · asked by Jenny 3 in Physics

can you just show me how to do this problem

2007-12-18 08:33:44 · 4 answers · asked by Devon S 1 in Mathematics

2007-12-18 08:32:01 · 1 answers · asked by Anonymous in Engineering

I have to fit a line through a number of points with the least squares method. I am looking for a relationship y = Ax + B. I have a fixed number of x's, but I can do my measurements at any x within a range xmin =< x =< xmax.

My question: Where should I do my measurements such that I get the most reliable fit? I am thinking about spreading the x's equally over the range or concentrating around xmin and xmax.

2007-12-18 08:30:39 · 2 answers · asked by Anonymous in Mathematics