Science & Mathematics - 16 October 2007

2007-10-16 13:09:08 · 3 answers · asked by Franky 1 in Weather

when my little brother was little, he would be in his room talking to the air in front of him. just as if someone was there. he would sleep walk to the exact same spot everynight. he would say "look mom darren has a owie on his head" at home sometimes and point to the air next to him. similar expieriances with other names and body parts. just like the sixth sense in random places other than home.
(the darren one was at home though) we have never known anyone named darren.
same with my little sister. but nothing with me and my other brother.
and i also heard on the radio other expieriances with mothers and thier kids.
i at the age of 4 and 5 and 6, he didnt really know what imaginary friends were and probably didnt think of that.
what do you think?

2007-10-16 13:08:14 · 21 answers · asked by ? 4 in Paranormal Phenomena

2007-10-16 13:05:47 · 4 answers · asked by nightshade_13045 1 in Medicine

Calculate the specific heat of a metal. in J/kg.K, from the following data. A container made of the metal has a mass of 3.6 kg and contains 15.0 kg of water, a 1.8 kg of The metal initially at temperature of 187.0°C is dropped into the water. the container and the water have a initial temperature of 16.0°C and the final temperature of the entire system is 18.0°C.

2007-10-16 13:05:44 · 1 answers · asked by Anonymous in Chemistry

2007-10-16 13:05:06 · 4 answers · asked by Anonymous in Other - Science

...Person and canoe have a combined mass of 105kg. (a) Ignoring air resistance and friction, find the velocity of the canoe after the person throws the stone. (b) With what velocity would the person have to throw the stone in order to get the canoe to move at 1m/s?

the answers are (a) 0.38m/s (b)21m/s but i need the work. can someone help?

2007-10-16 13:04:26 · 4 answers · asked by Danielle M 1 in Physics

A sample of Al (specific heat = 0.900-J/g°C) weighing 222.5-g is boiled in water at sea level until it reaches 100.0°C.
The sample is dumped into a coffee cup containing an unknown mass of water that had reached equilibrium temperature 20.3°C.
The temperature of the water and Al rose to 37.5°C.
Assuming that no heat is absorded by the coffee cup, what was the mass of the water in the coffee cup. (in grams)

2007-10-16 13:04:13 · 1 answers · asked by Anonymous in Chemistry

Einstein is about to be proven wrong when he said nothing moves faster than the speed of light. Evidence is mounting to support the above question. Its called The Inflationary Theory. Information about this theory is hard to find, but its out there. Do you think its possible, from a microscopic spec in a fraction of a second? Incredible speed. How would you describe something that moves faster than the speed of light?

2007-10-16 13:02:36 · 2 answers · asked by ZORRO 3 in Physics

My last time was Friday!

2007-10-16 12:57:43 · 13 answers · asked by Anonymous in Medicine

what would happen to the world and to the latitude zones if earth rotated backwards!
need help please
thanks:]

2007-10-16 12:57:17 · 2 answers · asked by lexxa 2 in Geography

gerr i keep getting 34.4% and that is wrong. what am i messing up??

2007-10-16 12:56:33 · 1 answers · asked by Brittaney 1 in Chemistry

really that simple minded?
I just came from the SCIENCE & MATH section and there is not a single paranormal ghost or psychic question there.
You are all clicking on the alternative and the paranormal for alterior reasons you are not claiming.
All you have to since it seems to bother you all so much is to go to the top of this page and click on the blue words, SCIENCE & MATH and you will not see a single ghostie,
You are coming to this section and you know good and well what you are doing.
Go to the main section, but then again, I never see any of you over there, only here where you can argue and complain.

2007-10-16 12:56:20 · 9 answers · asked by Anonymous in Other - Alternative

I am really struggling with these questions , please show me the complete work for this as I need to find out where I am making sign errors. I get close but can't finish finding a and b and c. I have tried many of these questions , many times and still none work out PLEASE HELP ME!!!!

2007-10-16 12:56:16 · 1 answers · asked by Anonymous in Mathematics

dogs and stuff acting up before the earthquake, my dog had been running awayy every day for the past 4 days.and he is trained not to run away.so what do you think?is it cuz of he knew about the earthquake?

2007-10-16 12:54:12 · 1 answers · asked by young lovee. <33 3 in Earth Sciences & Geology

1, Describe the parts of a long bone.

2. What is the function of bone marrow? How does red marrow differ from yellow marrow?


3. How do voluntary muscles differ?

4. how does cardiac muscle compare muscles differ?

5. How does cardiac muscle compare with smooth muscle?

6. Describe how the action of muscles allows you to bend your arm and to starightn your arm.

7. What are the differnces between a sprian, a strain, and a fracture?

8. Describe the two layers of the skin

9. Describe three structures found in the dermis.

10. How does sweat cool the body?

11. List three functions of the skin.

2007-10-16 12:52:03 · 2 answers · asked by Noone19 1 in Biology

given a -2,1,b2,5,c6,-1 and d4,-7 form a quarrilateral p q r and s are the midpoints of the sides ab, bc, cd, and da respectively . prove that pqrs is a parallelogram

2007-10-16 12:51:12 · 5 answers · asked by Anonymous in Mathematics

this is a sample math problem i had it on a worksheet.

bob has N pecans and D penuts. if you add D+N, how many nuts do you have?


how the **** am i supposed to know?

2007-10-16 12:50:01 · 2 answers · asked by Ally 2 in Mathematics

An astronaut on the surface of the Moon fires a cannon to launch an experimental package, which leaves the barrel moving horizontally. Assume that the free-fall acceleration on the Moon is one sixth that on the Earth.
(a) What must be the muzzle speed of the probe so that it travels completely around the Moon and returns to its original location?
km/s
(b) How long does this trip around the Moon take?
h

2007-10-16 12:49:35 · 1 answers · asked by Anonymous in Physics

for our science experiment, we are suppose to find out whether or not birds will explode/choke(i dont think they do, but that's what we are going to find out), but we are not going to use real birds(of course). so what we came up with is that we are going to put white rice, brown rice, and birdseeds inside different beakers of water. and we also came up that we should stimulate the temperature inside a birds stomach to get more accurate results. so can someone please tell me what a bird(in general)'s body temperature is?
thanks a lot

2007-10-16 12:49:33 · 2 answers · asked by why me? 4 in Biology

I have just watched the film Resident Evil the first 1 as it is a pretty good film lol

i was wondering could such a virus actualy exist or could the dead come back to life , in the movie the virus called the T-Virus ...... reactivates dead cells but only gives the person limited ability such as minor motor functions maybe little memory but only the basic instinct which is to feed , 1 bite or scratch to a living person they become infected

so could this happen?

2007-10-16 12:46:51 · 4 answers · asked by CFC ♪♫ Careefreee ♪♫ 7 in Biology

I got this flat wrong on my quiz and obviously need a little more help with it...

lim (sin x) / (3x)
x->infinite

2007-10-16 12:46:10 · 2 answers · asked by iSmile 2 in Mathematics

for a project in school (due tomorrow!!!) i am trying to find out the closest water source to the sahara desert that you can drink. and if u know, how far away (in miles) is it from the ending of the desert? you don't even have to know the last part just any information about it you know!! thnx so much!

2007-10-16 12:43:58 · 3 answers · asked by Anonymous in Geography

find the one that does not belong....
36, 163, 68, 960, 1661, 62


make a dollar using 50 coins....



What geometrical figure represents a lost parrot?


replace B, E, and H to make true equasion...
BBE
+HE
----------
HEEE

2007-10-16 12:43:32 · 7 answers · asked by ? 1 in Mathematics

I could use a couple of links to some sites. thanks!

2007-10-16 12:43:03 · 1 answers · asked by Anonymous in Zoology

factor completely

- x^2-y^2
- y^3x-x^3y

- x^2+2xy+y^2

thanks

2007-10-16 12:43:01 · 1 answers · asked by diana f 1 in Mathematics

you have 100 meters of fencing material to enclose a rectangular plot.

a) determine the dimensions which maximize the enclosed area.

b) if you double the amount of fencing, what affect does this have on the maximum possible area enclosed? explain.


i have NO earthly idea what this means or is asking. please help me. thank you very much!

2007-10-16 12:42:09 · 4 answers · asked by Elizabeth 3 in Mathematics

Cheetahs are unique because they combine physical traits of two distinctly different animal families: dogs and cats. They belong to the family of cats, but they look like long-legged dogs. They sit and hunt like dogs. They can only partially retract their claws, like dogs instead of cats. Their paws are thick and hard like dogs. They contract diseases that only dogs suffer from. The light-colored fur on their body is like the fur of a shorthaired dog. However, to climb trees they use the first claw on their front paws in the same way that cats do. In addition to their dog only diseases, they also get cat only ones. And the black spots on their bodies are, inexplicably, the texture of cat’s fur.

Genetic tests have been done on them and the surprising result was that in the 50 specimens tested, they were all, every one genetically identical with all the others.

Does anybody have any ideas which would explain cheetahs' genetic uniformity?

2007-10-16 12:41:58 · 3 answers · asked by eriginal 1 in Zoology

I am having trouble with complex #'s .

I have three problems.. for one of them I have the answer ; however I don't know how to do the work for any of them.


#1 .
Problem:
(2 - 3i)/(3 + 4i)

Answer: -6/25 - (17/25)i


Problem 2.
Let z = a + bi represent a general complex number. As noted in the lesson, the conjugate of z, abbreviated conj(z) or conj(a + bi) is the complex number a-bi. Also, the modulus of z, modulus(z) is the "size" of z, or SQRT(a^2 + b^2). Which of the following is true for all complex numbers?
Answer Options:

All of the following
z + conj(z) = 2a
z - conj(z) = 2bi
None of the above


Problem # 3:
Which number is the largest?
A3i
B-7
C4
D -2i
E 4 + 4i
F None of the above

I thought it was 4 but I was wrong...

2007-10-16 12:41:42 · 2 answers · asked by Jaz 'ma' Taz 2 in Mathematics

show work for best answer

2007-10-16 12:40:19 · 5 answers · asked by skinzfan36 1 in Mathematics

If the angles of a triangle are represented by x, (3x+20, and 6x, the triangle must be...

a) isosceles
b)right
c) obtuse
d) acute

please explain


thanks

2007-10-16 12:40:18 · 7 answers · asked by Magnun S 3 in Mathematics