Science & Mathematics - 15 January 2007

I have a lot of questions. I'm only going to start with four for now, though.

1]How many calories are need to change 1 gram of 0C ice to water?

2]How many calories are needed to change the temperature of 1 gram of water by 1C? Wouldn't this answer be 1 calorie?

3]How many calories are needed to melt 1 gram of 0C ice and turn it to water at a room temperature of 23C?

4]A 50-gram sample of ice at 0C is placed in a glass beaker that contains 200g of water at 20?.
a]How much heat is needed to melt the ice?
b]By how much would the temperature of the water change if it gave up this much heat to the ice?
c]What will be the final temperature of the mixture? [Disregard any heat absorbed by the glass or given off by the surrounding air.]

2007-01-15 05:47:47 · 3 answers · asked by Anonymous in Other - Science

What is the 2 digit number whose cube root is the square root of the sum of its digits?

2007-01-15 05:47:14 · 4 answers · asked by umpalumpas_rock 1 in Mathematics

2007-01-15 05:45:26 · 12 answers · asked by Carolyne 1 in Geography

For example, what kind of equipment should they be equipped with? Do they need to wear special clothing? How high will they jump? How hard must they kick the ball? Such things like that.

2007-01-15 05:44:51 · 4 answers · asked by sped_hunter 1 in Astronomy & Space

I have physics homework and I have to think of examples of pressure in every day life-such as scuba diving, weather reports, submarines or aeroplanes. Can anyone think of any others? Or give me information on pressure in an aeroplane? I can't find anything on the internet!

2007-01-15 05:44:28 · 5 answers · asked by Anonymous in Physics

Or any other maths past papers.

2007-01-15 05:44:02 · 4 answers · asked by Okey Dokey 1 in Mathematics

2007-01-15 05:43:08 · 5 answers · asked by viktoria y 1 in Earth Sciences & Geology

a. oxygenated blood being pumped from the right ventricle
b. deoxygenated blood on its way to the lungs from the right atrium.
c. deoxygenated blood on its way to the body from the left atrium
d. oxygenated blood being pumped from the left ventricle

2007-01-15 05:43:08 · 4 answers · asked by vermilion_chick 1 in Biology

If an embryo can stand to be frozen is it really a human life?

2007-01-15 05:41:33 · 1 answers · asked by lonetraveler 5 in Medicine

2007-01-15 05:41:05 · 5 answers · asked by raptureinkisses 2 in Other - Science

{y+8}={8y+5}

where Y is a real number and there are allowed to be more than one solution.
{} refer to the radical/square root sign

2007-01-15 05:39:25 · 3 answers · asked by pirsimone 1 in Mathematics

/ show the fraction line.
-1/x + 1/ -1/x + 6

2007-01-15 05:39:01 · 4 answers · asked by Anonymous in Mathematics

2007-01-15 05:37:58 · 5 answers · asked by Anonymous in Physics

2007-01-15 05:35:10 · 3 answers · asked by danica 1 in Chemistry

I once saw an old medical diagram relating different surgeries to the level of conciousness or unconcious needed to attain by anethesia for the patient not to be cognizant of it.

2007-01-15 05:34:23 · 3 answers · asked by Anonymous in Medicine

2007-01-15 05:34:20 · 10 answers · asked by Anonymous in Astronomy & Space

2007-01-15 05:32:11 · 6 answers · asked by Kevin E 1 in Mathematics

The sum of two numbers is 15 and the difference of their reciprocals is 1/10. Find the numbers.

Please show me the steps please! Thanks!

2007-01-15 05:28:56 · 5 answers · asked by Audy 1 in Mathematics

2007-01-15 05:28:33 · 5 answers · asked by Jessica 1 in Geography

Looking to design a pre-treatment step to remove silica for a RO desalination plant, but need a good idea of the flow rate to such a plant.

2007-01-15 05:26:55 · 1 answers · asked by Jesse B 1 in Engineering

2007-01-15 05:24:12 · 4 answers · asked by danica 1 in Chemistry

8x^2+6x+1=0

2007-01-15 05:23:37 · 3 answers · asked by pirsimone 1 in Mathematics

2007-01-15 05:22:39 · 3 answers · asked by danica 1 in Chemistry

2007-01-15 05:21:37 · 5 answers · asked by danica 1 in Chemistry

2007-01-15 05:20:48 · 5 answers · asked by robert w 1 in Mathematics

2007-01-15 05:20:01 · 17 answers · asked by Anonymous in Mathematics

i am taking gen chem in college and i need help bc i know very very little about chem but it is a required nursing course... can anyone tell me how to do Moles in a scientific calculator (bc i dont want to have to work the whole problem out on paper, bc on a test we only have an hour to do several questions). I have a TI 83 i would really appreciate if someone would help me. i have signed up for tutoring but that doesnt start until next week.

2007-01-15 05:19:51 · 4 answers · asked by Lex 2 in Chemistry

2007-01-15 05:18:29 · 10 answers · asked by Anonymous in Chemistry

2007-01-15 05:15:20 · 6 answers · asked by jessica 1 in Mathematics

What is your favorite 4 numbers from 0,1,2,3,4,5,6,7,8,9 ? Please choose 4 numbers. Thank you. If I strike your number in pick four lotto, I will choose yours the best answer.

2007-01-15 05:13:09 · 8 answers · asked by rajkath 2 in Mathematics