Science & Mathematics - 30 November 2007

Z1) In electrolytic cells, the flow of electrons is spontaneous.
Z2) In electrolytic cells, the electrons flow in the external circuit (through the wire) from the anode to the cathode.
Z3) In the electrolytic cells, the cathode is the negative electrode.

Which of the following is true?

1. Z1 and Z3 only

2. Z1 only

3. Z2 and Z3 only

4. Z1, Z2 and Z3

5. Z3 only

2007-11-30 13:28:25 · 1 answers · asked by LovelyLady 3 in Chemistry

oregon

2007-11-30 13:26:53 · 3 answers · asked by Anonymous in Geography

I think I saw a pair of them around 1 AM, but I can't be sure. I couldn't tell at first, but when I got close enough and my depth perception came back, I realized they were huge! They could have eaten my cat (about 15 pounds) for dinner and had room for seconds. I got a flashlight for a better look and they were the right color, plus they had the telltale "horns" on their heads, but don't other owls have that? But what owls even come close to that size?

I've seen Great Horned Owls in captivity, but never heard their calls. These two were calling for over an hour, and one had a deep, booming voice while the other had a slightly higher one, but the calls were still similar. Think they were the same? I looked up recordings online. There was one with two owls, but I couldn't tell if the second one was a deeper voice or just further away.

I thought they were just migrating through, but these two were calling for an hour or more. Do owls have territorial calls like some wild mammals?

2007-11-30 13:26:07 · 4 answers · asked by dragon8rider2 2 in Zoology

1. Na+ + 1e- ----> Na

2. 2H2O + 2e- ---> 2OH- + H2

3. Br2 + 2e- ---> 2Br-

4. Na ---> Na+ + 1e-

5. 2Br- ---> Br2 + 2e-

2007-11-30 13:25:35 · 2 answers · asked by LovelyLady 3 in Chemistry

Two moles of an ideal gas initially at 224K and 0.55 atm are compressed to 1.55 atm. I have to find the final volume of the gas so first I found initial volume 67.72 then I found the final volume which was 0.024 in m^3 and I used 8.31451 as R and would it make a difference if it's an isothermal process?

2007-11-30 13:24:58 · 2 answers · asked by Shane 1 in Chemistry

2007-11-30 13:22:52 · 10 answers · asked by Anonymous in Mathematics

ammonium sulfate? The teacher gave my niece this question as part of an assignment. I am at a loss.
Any help would be appreciated, thanks!

2007-11-30 13:22:36 · 4 answers · asked by TygerLily 4 in Chemistry

I'm not yet in calculus, but differentiating doesn't seem too hard (I can get down the very basics)...I was just wondering if someone would be able to explain how to find the vertex of a parabola using the derivative...I really hate using complete the square...it's time consuming and boring! Using another method would also be useful to double check my answer. Also, are there any other calculus tricks that are useful for simple applications (ex. simple functions, trig, etc.). Thank you in advance.

2007-11-30 13:22:11 · 5 answers · asked by HSR 2 in Mathematics

2007-11-30 13:13:09 · 8 answers · asked by Sis F 6 in Mathematics

When the time is 2:18, how many degrees are there in the acute angle between the minute hand and the hour hand on a clock?

2007-11-30 13:13:05 · 5 answers · asked by anonymous 2 in Mathematics

what is tins density at room tempreature and its electron configuration

2007-11-30 13:03:29 · 1 answers · asked by Anonymous in Physics

2007-11-30 13:03:20 · 5 answers · asked by Silver 3 in Geography

2007-11-30 13:02:43 · 7 answers · asked by jared r 1 in Mathematics

Years ago I was at home.I had the urge to draw something. I drew a picture..colored it etc. The next day a picture just like it was hanging in front of the pulpit. One of the ladies at church had drawn it. (No...it wasn't there before)

2007-11-30 13:00:46 · 13 answers · asked by Deenie 6 in Paranormal Phenomena

2007-11-30 13:00:33 · 6 answers · asked by Anonymous in Mathematics

2007-11-30 12:59:16 · 5 answers · asked by jessejames2nice 1 in Astronomy & Space

Its well known that as one of two twins relatively approaches the speed of light, the age difference between both will become significant.

However, if one of them remains still relative to the earth and the other runs, say 10 meters, up and back, would there still be a small (even an attosecond) difference in the age of each twin?

2007-11-30 12:57:47 · 3 answers · asked by sal 1 in Physics

I read a question about esp and someone who answered said they do not have plants or animals in their living area. But they didn't say why.

2007-11-30 12:56:28 · 10 answers · asked by tig 3 in Parapsychology

z=x-y+4
z=y-w-3
z=w-x+5

What is the value of z?
A. 2
B. 3
C. 4
D. 6
E. 12

The answer is D. How do I do this?

2007-11-30 12:53:27 · 6 answers · asked by Anonymous in Mathematics

If he was here before the big bang why did he make it happen and from where did he get the power?

2007-11-30 12:52:35 · 12 answers · asked by alex w 3 in Astronomy & Space

Could you kindly direct me to a website that explains this?

2007-11-30 12:48:28 · 3 answers · asked by Mathieu 1 in Engineering

An 75.0 N box of clothes is pulled 16.0 m up a 30.0° ramp by a force of 115 N that points along the ramp. If the coefficient of kinetic friction between the box and ramp is 0.22, calculate the change in the box's kinetic energy.

Show me how to plug in the numbers and what you did to find fnet

2007-11-30 12:47:06 · 4 answers · asked by Anonymous in Physics

I had a woodpecker pass through our yard recenty, and i was wondering if there were any ways to get it to come back

I have sunflower, cracked corn and suet feeders, but it did not touch any of them

Thanks

2007-11-30 12:45:57 · 6 answers · asked by Anonymous in Zoology

has two differerent collored eyes

2007-11-30 12:44:59 · 4 answers · asked by S i r i 1 in Medicine

2007-11-30 12:43:29 · 19 answers · asked by giuseppi 3 in Zoology

2007-11-30 12:43:24 · 7 answers · asked by THAT girlll 1 in Physics

2007-11-30 12:43:08 · 2 answers · asked by S i r i 1 in Medicine

you ever heard someone had

2007-11-30 12:42:45 · 2 answers · asked by S i r i 1 in Medicine

2007-11-30 12:35:41 · 7 answers · asked by tessababy992006 1 in Chemistry

What does it mean???

2007-11-30 12:33:31 · 5 answers · asked by Anonymous in Mathematics