Science & Mathematics - 4 December 2007

2007-12-04 14:42:46 · 3 answers · asked by nightowl 2 in Mathematics

2007-12-04 14:41:32 · 4 answers · asked by tbirdsrule20 1 in Biology

2007-12-04 14:40:25 · 9 answers · asked by Jade B-Dub 1 in Mathematics

Compare the highest resolution attainable with optical telescopes with the highest resolution attainable with radio telescopes (including interferometers)

2007-12-04 14:38:53 · 4 answers · asked by Star_Gazer 1 in Astronomy & Space

How do i do this?

What polynomial has the solutions of 2, -1, and 3?

and what one has the solutions of -2, 3i?

thanks

2007-12-04 14:38:37 · 2 answers · asked by hioctane103 2 in Mathematics

find the range of the function y=-3x+7 given the following domain: {-3,-1,1,3,5}
and
find the range of the function y=3x+5 given the following domain: {-3,-1,1,3,5}

2007-12-04 14:37:38 · 3 answers · asked by sugar 1 in Mathematics

A 200,000kg DC-10 aircraft uses a run of 3.6km to achieve its takeoff speed 320km/h. If each of the three engines produces the same thrust and the acceleration is uniform, find the net thrust per engine. thxs again

2007-12-04 14:37:00 · 1 answers · asked by sascot 1 in Physics

164cm to inches? help?

2007-12-04 14:36:38 · 8 answers · asked by LonelyHarts 2 in Mathematics

2007-12-04 14:35:19 · 1 answers · asked by Knightz 1 in Medicine

What are the properties of CSC, COS,SEC,TAN, AND COT. Meaning whats the domain, range, continuity, symmetry, bounded,asymptote, and max/min. I know the domain for Sin is all real numbers. Any help can help!! Please helpp

2007-12-04 14:35:13 · 3 answers · asked by Livelife5002 2 in Mathematics

1. What organisms produce most of the oxygen in the atmosphere?
2. How do plants use both carbon dioxide and oxygen?
3. Plants can use nitrogen after it has been converted by
A. photosynthesis
B. bacteria
C. evaporation
D. compounds
4. What is a renewable resource?
5. What is a nonrenewable resource?
6. How is acid rain able to affect lakes far from the couse of the pollution?
7. Why does conserving coal save more resources than just the amount of coal that would have been mined?
8. Because they are cycled through ecosystems, nitrogen, carbon dioxide, and oxygen are-
A. Conserved resources
B. Renewable resources
C. Nonrenewable resources
D. Reusable resources

2007-12-04 14:34:55 · 2 answers · asked by Anonymous in Earth Sciences & Geology

Is the momentum of a system always conserved? Explain by giving examples, please?

2007-12-04 14:34:46 · 3 answers · asked by Lisa R 2 in Physics

Why do infrared satellites have to be cooled?

2007-12-04 14:32:44 · 4 answers · asked by Star_Gazer 1 in Physics

yes, the mineral. help plz?

2007-12-04 14:32:00 · 3 answers · asked by Anonymous in Earth Sciences & Geology

My daughter is a freshman and is taking Algebra 1. She took it last year and had some problems, but understood it by the end of the course. I made her take it again this year but is very bored in class because she knows everything already. Should I try to get her into geometry for the rest of the school year or hire a tutor for geometry this year?

2007-12-04 14:31:56 · 4 answers · asked by Laura 2 in Mathematics

A 100 N force and a 50 N force act on the same object. The angle between the forces measure 90 degrees. Find the magnitude and direction of the resultant force.

2007-12-04 14:30:57 · 1 answers · asked by SoulEaterKurizu 5 in Mathematics

Prove:
csc^2x-1=(csc^2x)(cos^2x)
can someone show me the steps of solving this question

2007-12-04 14:30:11 · 5 answers · asked by Sunshine 2 in Mathematics

2007-12-04 14:28:27 · 3 answers · asked by stacy v 1 in Medicine

Using a good digital watch, get the exact time when a bright star goes behind a distant building or tower. A day later time the disappearance again. Sighting over a nail fixed in a window sash will help you return your eye to the same location for each sighting. It will be found that:

a) the star disappears at the same time each night
b) the star disappears a little earlier each night
c) the star disappears a little later each night.

2007-12-04 14:27:31 · 1 answers · asked by ? 6 in Physics

the mass of 0.25g of Zn.
moles of the 0.25g Zn.
volume of 10mL of 6M HCl

2007-12-04 14:26:32 · 2 answers · asked by Anonymous in Chemistry

Simplify the Square Root of 120.

Does that mean the same thing as: the Square Root of 120.
I got 10.95

Correct?

Thanks

Happy Holidays
&
Happy Hanukkah

2007-12-04 14:25:46 · 6 answers · asked by Julia 1 in Mathematics

This question is a "conceptual question" in my chem textbook, in the Solutions chapter. I suppose it has something to do with the acidic properties in vinegar.... but what of the salt? Does it wilt because it needs -OH molecules from the water in the salad?

Thanks for your ideas!

2007-12-04 14:24:25 · 3 answers · asked by Anonymous in Chemistry

2007-12-04 14:24:15 · 10 answers · asked by Anonymous in Astronomy & Space

Calculate the number of molecules exhaled in each breath at body temperature, 37 degrees celcius and 1.0 atm.

2007-12-04 14:21:22 · 2 answers · asked by flo_town02 1 in Chemistry

3x+2y=-11
-3x-2y=11

2007-12-04 14:20:49 · 12 answers · asked by Anonymous in Mathematics

could it be because of the pressure change from the temperature in our house being colder in the morning, so less force was being exerted on the lid, and later it was easier because it was warmer and there was more force on the lid?

i wanna know if my sister is stronger than us! we both work out just as much as she does!

thanks~

2007-12-04 14:19:44 · 13 answers · asked by Eileen 1 in Chemistry

2007-12-04 14:19:31 · 4 answers · asked by ilmbg 2 in Geography

2007-12-04 14:17:17 · 6 answers · asked by rudiball 1 in Mathematics

An 865 kg airplane starts at rest on an airport runway at sea level.
(a) What is the change in mechanical energy of the airplane if it climbs to a cruising altitude of 2400 m and maintains a constant speed of 95.0 m/s?
(b) What cruising speed would the plane need at this altitude if its increase in kinetic energy is equal to its increase in potential energy?

2007-12-04 14:14:58 · 3 answers · asked by p0oh 1 in Physics

a person took this photo of the bat flying up and down on a wooded path.. there were no other bats in sight, if you notice it has a shadow, so its not any reflection...
http://img87.imageshack.us/img87/7957/picture20487wi6.jpg

2007-12-04 14:14:53 · 18 answers · asked by ‡ЭЭЭ‡ 5 in Paranormal Phenomena