Science & Mathematics - 7 November 2007

I don't know the answer to this quiz question, any ideas?

I found the asian elephant has a finger, it also has nails on the feet but my best guess so far is the intestine.

Any other suggestions?

2007-11-07 23:59:19 · 13 answers · asked by Anonymous in Zoology

2007-11-07 23:59:13 · 3 answers · asked by Anonymous in Earth Sciences & Geology

points a (2,5) and b (7,8) lie on a line. what is the equation of the line in standard form { ax + by = c } ?

2007-11-07 23:57:22 · 5 answers · asked by Anonymous in Mathematics

The enthalpy of combustion of octane, C8H18, one of the major components of gasoline, is 5463 kJ/mole or 48 kJ/g. The density of octane is 0.70g/mL.

If your chemistry teacher's car requires approximately 10 L of octane in order to travel 100 km, how much energy does it require to travel 100 km?

2007-11-07 23:52:44 · 3 answers · asked by Anonymous in Physics

The enthalpy of combustion of octane, C8H18, one of the major components of gasoline, is 5463 kJ/mole or 48 kJ/g. The density of octane is 0.70g/mL.

If your chemistry teacher's car requires approximately 10 L of octane in order to travel 100 km, how much energy does it require to travel 100 km?

2007-11-07 23:51:48 · 2 answers · asked by Anonymous in Chemistry

The enthalpy of combustion of octane, C8H18, one of the major components of gasoline, is 5463 kJ/mole or 48 kJ/g. The density of octane is 0.70g/mL.

If your chemistry teacher's car requires approximately 10 L of octane in order to travel 100 km, how much energy does it require to travel 100 km?

2007-11-07 23:48:53 · 1 answers · asked by Anonymous in Chemistry

2007-11-07 23:48:38 · 5 answers · asked by Anonymous in Astronomy & Space

elements or sumthing... it was ask during our board exam?

2007-11-07 23:46:09 · 5 answers · asked by Adonis O 1 in Chemistry

In physics we're doing an experiment on velocity (if you google 'experiment 36-velocity' and pick the 2nd result it will tell you. I know that decreasing the wind resistance caused by a card (needed to measure the velocity with a motion sensor), but can the mass of the car affect it's velocity? Please help!

2007-11-07 23:25:51 · 5 answers · asked by Anonymous in Physics

2007-11-07 23:24:18 · 3 answers · asked by kawaiime 1 in Physics

any general formula?

All i know is that "product of all factors" of N = (a^b) x (c^d) x ... = a^(1+2+...b) x c^(1+2+...d) x ....

Any similar thing to find "sum of all factors"?
Thank you.

2007-11-07 23:16:06 · 2 answers · asked by ʞzɹәႨnɹ 2 in Mathematics

e.g>> 100 - 59.60=
50 - 26.10=

Help !! i cant do this sum mentally........
Can somebody help me pls??
I am 15 yrs old..........
Is there any problem with me?
Are there easily ways/method to do it??

2007-11-07 23:15:33 · 6 answers · asked by Anonymous in Mathematics

how do i solve this??


Two charged balls are 20 cm apart. They are moved and the force on each of them is found to have been tripled. How far apart are they now?

2007-11-07 23:15:11 · 1 answers · asked by Anonymous in Physics

As i know, the reason earth orbits around the sun is due the effect of curved-space. However, i'm curious - How/where did the force come from to keep pushing the planets moving around? It just didn't make sense to me that planets move by itself around the sun.

Your answers are very much appreciated. Thanks =)

2007-11-07 23:10:08 · 11 answers · asked by Anonymous in Astronomy & Space

2007-11-07 23:06:37 · 6 answers · asked by ally 2 in Earth Sciences & Geology

do you find that when its cold and rainy everyone moans when its boiling hot everybody moans when its in between everybody moans. dont you find no matter the weather everybody moans about it

2007-11-07 23:01:27 · 4 answers · asked by 10 out of 10 4 in Weather

If 5g of butter are burned in a calorimeter containing 1 L of water (density of water is 1g/mL), the temperature of the water rises from 21°C to 66°C. determine the amount of energy that is transferred to the water.

2007-11-07 23:00:07 · 2 answers · asked by Anonymous in Chemistry

My question-

Find 4 no.s such that sum of any 2 is a perfect square and sum of all 4 is also a perfect square.

2007-11-07 22:49:54 · 5 answers · asked by Hero of all times!! 1 in Mathematics

On complete combustion, 4.0g of a hydrocarbon give 11.0g of carbon dioxide and 9.0g of water.

What is the formula of the hydrocarbon?

(1) CH4
(2) C2H4
(3) C2H6
(4) C3H8

The answer is (1) CH4..why? I don't understand...please explain..thanks.

2007-11-07 22:44:19 · 4 answers · asked by ♪£yricảl♪ 4 in Chemistry

2007-11-07 22:22:55 · 18 answers · asked by pommygit23 1 in Astronomy & Space

2007-11-07 22:20:40 · 11 answers · asked by pommygit23 1 in Astronomy & Space

2007-11-07 22:20:26 · 5 answers · asked by macai tan 1 in Mathematics

temp also a type of energy then why its incresing

2007-11-07 22:18:49 · 4 answers · asked by Anonymous in Chemistry

2007-11-07 22:18:13 · 13 answers · asked by pommygit23 1 in Astronomy & Space

2007-11-07 22:13:24 · 14 answers · asked by WfD 2 in Paranormal Phenomena

please answer only if you know for sure

2007-11-07 22:11:00 · 6 answers · asked by Anonymous in Physics

lyt energy

2007-11-07 22:06:28 · 3 answers · asked by sonny 1 in Physics

What are the procedures and materials? The chalk should be able to write well in blackboards. Please explain.

2007-11-07 22:05:50 · 1 answers · asked by elvesrattackingme 2 in Chemistry

use that particle theory to explain how a substance dissolves.

2007-11-07 21:58:02 · 2 answers · asked by Anonymous in Chemistry

Or do they develop when they are in the pupa stage of the life-cycle?

2007-11-07 21:55:54 · 3 answers · asked by Cookie_Monster_UK 5 in Biology