Science & Mathematics - 30 November 2007

Pressure and temperature? Volume and Temperature?

2007-11-30 14:21:13 · 2 answers · asked by Nizie 1 in Physics

I'm trying to identify the cities at:

56°N, 38°E
34°S, 18°E
23°N, 82°W

And how do I find the Latitude and Longitude of:
London, England ________
Melbourne, Australia_______
Buenos Aires, Argentina_________

2007-11-30 14:18:09 · 5 answers · asked by Anonymous in Geography

thanks!!

2007-11-30 14:17:54 · 3 answers · asked by yourTIRAMISU 1 in Earth Sciences & Geology

Calcium-39 undergoes positron decay. Each positron carries 5.49 MeV of energy. How much energy will be emitted when 0.0025 mol of calcium-39 decays?

2007-11-30 14:16:01 · 2 answers · asked by Anonymous in Chemistry

Basically, demonstrate the existence of two infinite sets that cannot be placed into a one-to-one corrospondence with each other....

2007-11-30 14:12:04 · 7 answers · asked by Precious W 2 in Mathematics

what time is it gonna snow in Chicago
IL

2007-11-30 14:08:28 · 7 answers · asked by zembaphobia 4 in Weather

2007-11-30 14:07:27 · 8 answers · asked by Anonymous in Zoology

Does anyone know the period to this function...?
y=3cos(-theta/3)
or the asymptotes to this function:y=tan3/2 theta ?
please and thank you
it's trig... the formula to get the period one is 2pie/b if that helps

2007-11-30 14:03:45 · 1 answers · asked by Marybeth 1 in Mathematics

I just experienced a phenomenon at home. I found myself looking at two bright lights one on top of each other that came hovering down the stairs and stopped in the dining room, increased in brightness(silver color)and dissapeared like a flash, I was not afraid. It just felt peaceful. I was not the only one that saw it. I'm just amazed and will like to know. What it was?

2007-11-30 14:00:57 · 15 answers · asked by Anonymous in Paranormal Phenomena

Im a little confused as to how to find the answer. I am able to do it with only 2 numbers but the third number has throws me off.
What was the percent increase in the population in South America from 1900 to 2000?
1900-38,000,000,
1950-111,000,000,
2000-515,000,000

if it was only 2 say years 2000 and 1950 the equation would be
(515,000,000-111,000,000)/111,000000x100%
so what do I do when a third number is added ? does that make any sense ?

2007-11-30 13:59:19 · 5 answers · asked by ladybugg0829 2 in Mathematics

On the moon the acceleration due to gravity is 5ft/sec^2. An astronaut jumps into the air with an intitial velocity of 10 ft/sec. How high does he go? How long is it before he comes back down?

2007-11-30 13:59:17 · 4 answers · asked by Anonymous in Mathematics

A home heating system can supply energy at the maximum rate of 26 kW. If the house loses energy at the rate of 6.5 kW per °C of temperature difference between interior and exterior, what's the minimum outdoor temperature at which the heating system can maintain 22°C (71.6°F) indoors?

2007-11-30 13:59:00 · 2 answers · asked by Anonymous in Physics

I am referring to over the counter sleeping pills containing the active ingredient diphenhydramine.

2007-11-30 13:58:07 · 0 answers · asked by Anonymous in Medicine

I'm wondering about the advisability of buying one of these heaters.

2007-11-30 13:55:33 · 7 answers · asked by fredtheopope@sbcglobal.net 1 in Engineering

We're part of it, and it's so mind-numbingly huge (as if that wasn't enough, it's ever-expanding),we might be led to think "what are we doing here/ why are we here?".These questions aren't new, but if you read/watch some documentary about the universe, you'll feel totally desperate to know what's the point of all this. I also have some questions of my own. What's the shape of the universe? if it's expanding, and i believe it to be expanding in EVERY direction so, would that make it a sphere? or just no shape? 'Cause if it hasn't stopped expanding, how can it have a definite shape? I know, it's hard to answer, but if you really think about it for too long, it just drives you nuts. And I do believe that there is life beyond our solar system, seriously, how could there not be?! It's just a question of LOGIC! But, what's the point of all this? Don't you wish to know the truth? I like to think that after dying, all this mistery is revealed to us, in the afterlife or smth, like a revelation.

2007-11-30 13:52:38 · 10 answers · asked by João Silva 3 in Astronomy & Space

2007-11-30 13:47:54 · 13 answers · asked by dancingsmartypants 2 in Physics

please view http://mathematics--question.blogspot.com/ for the full question and the diagram...thanks for helping me solving this maths problem

2007-11-30 13:45:27 · 1 answers · asked by kasturi s 1 in Mathematics

there has been some snow in chicago but not alot like we always get

2007-11-30 13:45:03 · 10 answers · asked by Hammad Khan 2 in Weather

Currently im a 14 year old student.
I feel like a robot.
I feel like I have a routine every day.

I wake up.
Go to school.
Eat lunch
Come back home.
Eat.
Go to the gym.
Eat.
Walk the dog.
Clean my parents cars.
Do homework.

By then it's around 6:00-7:00pm.

I always go on myspace or youtube.

I want to do something worthwhile besides working out.

Something that I will gain from.
Suggest stuff for me.

Meditation or something.
I like that kind of stuff.


I'm a deep thinker

2007-11-30 13:44:36 · 7 answers · asked by Anonymous in Other - Alternative

1. Do the resonance frequencies depend on the tension of the string?
2. Do the resonance frequencies depend on on the mass density of the string?
3. Do the resonance frequencies depended on the length of the string?
4. Two strings equal in length and made of the same material are sujected to tensions in the proportion of 1:4; the one under the greater tension is the thicker string. If they vibrate at the same frequency, how do their diameters compare?

2007-11-30 13:44:12 · 1 answers · asked by mokachi 1 in Physics

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

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

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

4. 2Br- ---> Br2 + 2e-

5. 2H2O + 2e- ---> 2OH- + H2

2007-11-30 13:40:20 · 2 answers · asked by LovelyLady 3 in Chemistry

and angles

2007-11-30 13:39:06 · 2 answers · asked by Ciavana 3 in Mathematics

2007-11-30 13:37:06 · 1 answers · asked by truethirteen 2 in Mathematics

1. the net redox reaction

2. combustion

3. reduction

4. oxidation

2007-11-30 13:37:03 · 1 answers · asked by LovelyLady 3 in Chemistry

A person accidentally swallows a drop of liquid oxygen, 02 (l), which has density of 1.149 g/mL. Assuming the drop has a volume of 0.050 mL, what volume of gas will be produced in the person's stomach at a body temperature of 98.6 degrees F and a pressure of 1.0 atm?

2007-11-30 13:36:30 · 3 answers · asked by confused44 1 in Chemistry

In a mercury thermometer the capillary tube has a diameter of 0.0018 cm and the bulb has a diameter of 0.25 cm. Without the expansion of the glass how can I find the change in height of the mercury column for a temperature change of 35 degrees cecius if coefficient of volume expansion is 0.00018?

2007-11-30 13:33:29 · 2 answers · asked by glance 3 in Engineering

Concentrated hydrogen peroxide solutions are explosively decomposed by traces of transition metal ions (such as Mn or Fe):

H202 (aq) --> 2H2O (I) + O2 (g)

What volume of O2, collected at 27 degrees C and 746 torr, would be generated by decomposition of 125 g of a 50.0% by mass hydrogen peroxide solution?

2007-11-30 13:33:00 · 2 answers · asked by confused44 1 in Chemistry

a) ethanol
b)butanol
c)glycerol
d)benzyl alcohol
e)phenol
f) diethylether

2007-11-30 13:32:35 · 1 answers · asked by Marsymallows 2 in Chemistry

5. Complete the following nuclear reactions and name the decay process that is occurring in each:

a. 47Ca - > 47Sc + ?
b. 235U -> 4He + ?
c. ? -> 11B + 0-1e
d. 0-1e + ?-> 40Ar

2007-11-30 13:31:32 · 2 answers · asked by jennifer 2 in Chemistry

a) ethanol
b)butanol
c)glycerol
d)benzyl alcohol
e)phenol
f) diethylether

2007-11-30 13:31:11 · 1 answers · asked by Marsymallows 2 in Botany