Science & Mathematics - 24 November 2007

2007-11-24 14:56:14 · 10 answers · asked by Anonymous in Earth Sciences & Geology

Seriously, I was wondering this. Do they huddle together, what?

2007-11-24 14:54:24 · 5 answers · asked by Anonymous in Zoology

what if black holes are portals to a parallel universe. we know that smashing atoms in a proton accelerator creates anti matter for a split second and in a small amount. so what if in a black hole and under the huge pressure the atoms are been smashed or crushed so much that the are creating anti matter in huge amounts and bridging the matter universe with an anti matter universe. I know this might sound a bit wild and I have no evidence but its just a thought. What are yours on it?

2007-11-24 14:52:01 · 19 answers · asked by ronan 1 in Astronomy & Space

If Species A and B are algae, and both have the same limiting nutrient. When does one out-compete the other?

2007-11-24 14:46:54 · 2 answers · asked by aloeruffles 1 in Botany

I am trying to do my physics homework and there's a problem that asks to find the pressure inside the fluid of the hydraulic system. I am given a single mass and a single piston diameter. My only problem is that I do not know which equation to use! I have two conflicting equations (One printing in a booklet I have and the other one given by my professor in class). The one given in class is Pressure = Force / Area
and:
Pressure In = Pressure Out
so
Force1 / Area1 = Force2 / Area2

However, the booklet I have says:
Pressure1 = Pressure 2
so
Force1 * Area1 = Force2 * Area2

(Earlier in this printout it does say that pressure = force/area but that is only the pressure exerted by the fluid it states where the other is for an enclosed liquid system)

I get two drastically different answers depending on which equation I use and I do not know which one is correct! If someone could please help me that would be great!

2007-11-24 14:45:50 · 6 answers · asked by Amanda B 2 in Physics

2007-11-24 14:39:55 · 7 answers · asked by B 6 in Earth Sciences & Geology

2007-11-24 14:37:28 · 5 answers · asked by ecinoderm 1 in Astronomy & Space

It looked like an alien spacecraft...er...I don't remember what it did but if anyone can provide a link to the article or more info on it, I'd really appreciate it!

2007-11-24 14:37:27 · 3 answers · asked by ihatechunli 2 in Astronomy & Space

if a capacitor was charged to 345v and has 1.4 farads, how many amps can be drawn at peak?
i'm not sure if that makes sense, but i want to know how many amps i can draw at most, when it first starts to discharge.

2007-11-24 14:36:43 · 4 answers · asked by Alex 3 in Engineering

will using a 9 volt battery and using electrical wires attatched the the positive and negative side connected to two nails work as cathode protection?

2007-11-24 14:33:37 · 2 answers · asked by Speeding D 4 in Physics

For each of the following forms determine whether the following limit type is indeterminate, always has a fixed finite value, or never has a fixed finite value. In the first case answer IND, in the second case enter the numerical value, and in the third case answer DNE. Note that l'Hospital's rule (in some form) may ONLY be applied to indeterminate forms.
1)inf^inf DNE
2) inf^-e DNE
3) 0^inf 0
4) 1/-inf 0
5)pie^-inf DNE
6)pie^inf DNE
7) inf^-inf 0
8)inf^0 IND
9)0.inf IND
10) inf-inf IND
11) 1^0 1
12) inf^1 DNE
13) 1^inf IND
14) inf.inf DNE
15) 0^-inf DNE
16) 0^0 IND
17) 1^-inf IND
18) inf/0 DNE
19) 1.inf DNE
20) 0/inf DNE


Can you tell me whats wrong with this solution as still I am getting 3-1 wrong answers with this solution

2007-11-24 14:30:50 · 3 answers · asked by Anonymous in Mathematics

List 8 specific functions of proteins in the body and explain how these proteins determine your traits.
a. Many proteins are enzymes, which catalyze and regulate chemical reactions.
b. Enzymes that produce pigments can control the color of a flower.
c. Enzymes specialized for the production of red blood cell surface antigen determine blood type.
d. Proteins that regulate the rate and pattern of growth throughout an organism control its size and shape.

i have these four please help me with four more thanks a million

2007-11-24 14:23:17 · 3 answers · asked by Anonymous 2 in Biology

I have to do a science fair project and need to measure the viscosity of chocolate syrup when it is cooled. Any ideas how I can measure the viscosity, I'm really clueless on this?

2007-11-24 14:20:59 · 4 answers · asked by Blue 4 in Chemistry

i once had lunch on top of this mountain in it's resteraunt, but i can't remember what it was called.

2007-11-24 14:17:53 · 5 answers · asked by thatdude03 2 in Geography

This question has always bothered me... lol I'm just asking what people think could happen.

and btw, i may add that if you survived being sucked into one :) .

2007-11-24 14:12:37 · 10 answers · asked by Ren 3 in Astronomy & Space

how do you find the North and South of an unmarked magnetc? thankyou

2007-11-24 14:11:14 · 2 answers · asked by helloguy 2 in Engineering

Give the n and L values for the following:

a. 1s

b. 4d

2007-11-24 14:10:50 · 2 answers · asked by aaadaj 1 in Chemistry

perform the indicated operation?

2007-11-24 14:10:49 · 4 answers · asked by Anonymous in Mathematics

Name the orbital described by the following quantum numbers.

a. N = 3 L = 0

b. N = 3 L = 1

c. N = 3 L = 2

2007-11-24 14:10:18 · 5 answers · asked by aaadaj 1 in Chemistry

Write the electron configuration of Bromine.

2007-11-24 14:09:32 · 1 answers · asked by aaadaj 1 in Chemistry

i need help on doing cathode protection on nails.can i use electrical wires and attach the positive and nagative sides of a 9 volt battery to two nails?please i need an answer asap.its part of a project where im going to see which is the best way to stop rusting and i was wondering if that will work properly and not cause corrosion instead of protecting the nail from rust?

2007-11-24 14:09:09 · 3 answers · asked by Speeding D 4 in Engineering

1.) (x^2)/(x-3) - (9)/ (x-3)


2.) (x)/ (x+2) -(3/4)

2007-11-24 14:07:52 · 4 answers · asked by Anonymous in Mathematics

I can't seem to figure out how to solve this problem. I don't want the answer, but if someone could give me a link to a similar problem showing how to solve it that'd be great.

"Three water supply valves, A, B, and C, are connected to a tank. If all three valves are opened, the tank is filed in 8 hours. The tank can also be filled by opening A for 8 hours and B for 12 hours, while keeping C closed, or by opening B for 10 hours and C for 28 hours, while keeping A closed. Find the time needed by each valve to fill the tank by itself. (Hint: Let x, y, and z, respectively, be the fractions of the tank that valves A, B, and C can fill alone in 1 hour.)"

2007-11-24 14:07:40 · 2 answers · asked by Carl 2 in Mathematics

2007-11-24 14:07:39 · 2 answers · asked by Jason N 1 in Mathematics

i need help with this problem.

y is the function of x (y=)

6x - 3(y - 1) = 4x + 8

2007-11-24 14:06:53 · 5 answers · asked by IDchecker27 2 in Mathematics

I have to do corrections for homework and I have no idea what this problem means.

The measure of an angle is five times the measure of its complement. What is the measure of the angle?

I know the answer is 75 supposely

2007-11-24 14:03:59 · 2 answers · asked by XD 1 in Mathematics

Q: Find the integral by interpreting it in terms of its areas.

The integral from -4 to 4 of (16-(x^2))^(1/2), or the square root of (16-(x^2)).

Thanks!

2007-11-24 14:01:09 · 4 answers · asked by J 2 in Mathematics

mass of the popper: 0.02010kg
the drop height: 1.50m
the rebound height: 1.77m (1.86, 1.81, 1.64, 1.74, 1.79, 1.76, 1.75, 1.78)
the height of bounce when the popper is not turned inside out: 0.678m(0.65, 0.66, 0.82, 0.58)
E= m*g*h
please answer the qustions plz its urgent
question: determine:
-the gravitational potential energy at its highest point (after hitting the ground)
-the kinetic energy of the popper just before landing(hint: consider where the kinetic energy is being transffered from)
-approximately how much energy is stored as elastic potential energy before the popper flips(hint what other amount of energy that you have calculated could you use to determine this? Of that amouunt how much energy has been lost?"
-the total energy of the popper (at any point of its motion)
-if mechinical energy is conserved

3) what is reasonable estimate for the amount of nergy that is lost due to friction sound?
4) how much work is done in flipping the popper inside out?

2007-11-24 14:00:20 · 1 answers · asked by Anonymous in Physics

2007-11-24 13:58:16 · 2 answers · asked by ezekial55555 2 in Mathematics

I heard that if an object reflected light wave, we will see the color, depends on the light wave. But some materials, like glass and water, just let the photon go through.

But, how can we know if the photon is reflected or just go through? Both happen when the electrons don't need the energy to move to another energy level.

Please explain as clear as possible and use simple vocabulary. Sorry about my poor English.

Thanks in advance.

2007-11-24 13:50:53 · 1 answers · asked by ? 6 in Physics