Science & Mathematics - 18 October 2006

Any mathemathician can tell me how many diferent sudokus before they beging to duplicate?

2006-10-18 19:19:46 · 2 answers · asked by geiko 2 in Mathematics

1=1 as on idea. One is equal to another one as an idea.

One on the L.H.S is not equal to the another one on the R.H.S of equality if they are not ideas.

There can be no difference between one and another one, if there are ideas.

If a difference is realized between one and another one, then they cannot be ideas.

=>There can never be a difference among our ideas on different things.

2006-10-18 19:16:46 · 5 answers · asked by Opposite D 1 in Other - Science

I mean the future, and/or the past life? If time is like a circle, can you get off possibly in the future, as well as the past? If from the past, then they would have mastered the speed of light, but could we have lived other live's as well?
This is a mix of spirituality and science question.

2006-10-18 19:16:38 · 3 answers · asked by shardf 5 in Physics

What’s the isoelectric point of polymyxin B ?
Where can I get a 3D image of polymyxin B structure ?
Is it possible for polymyxin B to form micelle or liposome structures ?
What’s the Critical Micelle Concentration of polymyxin B ?

2006-10-18 19:15:26 · 1 answers · asked by biosensors 1 in Chemistry

I had some AP chemistry questions from the old review book, but there arent any "anwser key" for those questions..so i am just wondering maybe u can help me :D thx

5) All pf the following statements are true except
a) In a n endothermic process heat is transferred from the surroundings to the system.
b)The greater the specific heat of an object, the more thermal engery it can store.
c)The SI unit of specific heat capacity is joules per gram per Kelvin
d)Heat is transferred from the system to the surroundings in an exptherimic process
e)The temperature of a system is a state function

7) All of the following statements are true except
a)energy is neither created nor destroyed in chemical reactions
b)spontaneous reactions are always exothermic
c)kinetic energy is the energy associated with motion
d)energy is the capacity to do work
e)increasing the thernal energy of a gas increases the motion of its atoms

2006-10-18 19:14:54 · 2 answers · asked by whoisfool2003 1 in Chemistry

C2H4 + H2O2 → CH2(OH)CH2(OH)

2006-10-18 19:14:26 · 1 answers · asked by kenneth x 3 in Chemistry

a) OF2


b) N3-


c) NH3O


d) SO3 (central S)


e) H2O2

2006-10-18 19:12:41 · 1 answers · asked by kenneth x 3 in Chemistry

If it's not,then why so many rays living in it.As far as i know,stingrays only live in the ocean.Could it be that the rays ancestors were once a sea dweller millions of years ago and succesfully evolve into a fresh water creature when there's a sudden geological changes to the ocean floor?

2006-10-18 19:09:27 · 2 answers · asked by Anonymous in Earth Sciences & Geology

2006-10-18 19:09:17 · 10 answers · asked by Madushan 2 in Astronomy & Space

2006-10-18 19:04:47 · 8 answers · asked by boomhauer72 2 in Botany

2006-10-18 19:03:35 · 2 answers · asked by dipaksen1972 1 in Engineering

I asked a while ago about this, but I there was still some confusion in my mind. My ultimate goal is to use power electric heating coil from human powered bike. I was wondering, I will I be able to create enough power to power the coil?

Here's what I have so far: I took the motor out from an old fan, and I was thinking about directly connecting that to the bike. My question is would that work? If so, about how much power will I be able to get out of it? Am I going to need anything like an inverter? or can I just connect to the two end terminals to the coil, and that would work? Also, am I going to need a diode? Basically, what I am trying to ask is how would I put everything together? I have bits of info, just need to figure everything out.

Also, as for the coil, how does the wattage rating work? I am thinking of using maybe like a teapot coil..

Thanks in advance!!

2006-10-18 18:56:18 · 4 answers · asked by Sowatup 1 in Physics

I asked a while ago about this, but I there was still some confusion in my mind. My ultimate goal is to use power electric heating coil from human powered bike. I was wondering, I will I be able to create enough power to power the coil?

Here's what I have so far: I took the motor out from an old fan, and I was thinking about directly connecting that to the bike. My question is would that work? If so, about how much power will I be able to get out of it? Am I going to need anything like an inverter? or can I just connect to the two end terminals to the coil, and that would work? Also, am I going to need a diode? Basically, what I am trying to ask is how would I put everything together? I have bits of info, just need to figure everything out.

Also, as for the coil, how does the wattage rating work? I am thinking of using maybe like a teapot coil..

Thanks for all your help in advance!!

2006-10-18 18:54:28 · 3 answers · asked by Sowatup 1 in Engineering

2006-10-18 18:53:57 · 5 answers · asked by edwinmak133 2 in Chemistry

2006-10-18 18:52:58 · 8 answers · asked by Amirali C 1 in Medicine

2006-10-18 18:52:14 · 6 answers · asked by Roger L 1 in Biology

2006-10-18 18:45:38 · 13 answers · asked by Womz M 1 in Mathematics

Let's say a simple circuit consisting of dry cells connected in series and light bulbs is created.

If one dry cell runs out of power, is the circuit broken or does the dry cell then function as an electrical conductor, keeping the circuit unbroken? That is to say, assuming the other dry cells supply enough power, will the light bulbs stay lit?

2006-10-18 18:45:11 · 8 answers · asked by Anonymous in Physics

2006-10-18 18:45:08 · 2 answers · asked by dipaksen1972 1 in Engineering

doing an experiment with DCPIP for quantitation of vitamin C in orange juice
If possible, provide references

2006-10-18 18:42:55 · 2 answers · asked by ratface 1 in Biology

2006-10-18 18:38:34 · 13 answers · asked by laxeroflax04 2 in Engineering

2006-10-18 18:34:01 · 10 answers · asked by poojapotdar 1 in Biology

A freight train has a mass of 3E7 kg.
If the locomotive can exert a constant pull of 7.6E5 N, how long would it take to increase the speed of the train from rest to 289800 km/s? Answer must be in units of s.

2006-10-18 18:32:52 · 3 answers · asked by wish1oh1 1 in Physics

constructing a paper bridge, can only use minimal glue - nothing else. have tested cyclinder columns with 'T' shaped sections cut into each end for support and connections. Two of these hold more than one brick. I can use 4. Problem is the construction of the beam, has to have a clear span of 150mm by 300mm. Any ideas on the beam design ??

2006-10-18 18:31:11 · 6 answers · asked by jake s 2 in Engineering

show equation
how old are the twins if kevin is 5 years older?
age combined of all 3 is 53

2006-10-18 18:25:36 · 18 answers · asked by Anonymous in Mathematics

2006-10-18 18:17:05 · 8 answers · asked by ranaweera d 1 in Chemistry

I cant imagine snowing in the ocean. If it is not possible, what is preventing it from snowing over mass bodies of water?

2006-10-18 18:14:20 · 15 answers · asked by Anonymous in Weather

2006-10-18 18:13:09 · 13 answers · asked by deepthi c 1 in Mathematics

A 4.12 kg ball is dropped from the roof of a 170.9 m tall building. While the ball is falling to Earth, a horizontal wind exerts a constant force of 13.3 N on the ball.

The acceleration of gravity is 9.81 m/s^2
A) How long does it take to hit the ground (seconds)?
B) What is its speed when it hits the ground? (m/s)

2006-10-18 18:04:57 · 2 answers · asked by wish1oh1 1 in Physics

2006-10-18 18:02:58 · 7 answers · asked by moltenrock04 1 in Engineering