Science & Mathematics - 2 October 2007

The circumference of a circle and the perimeter of a square are the same.

Which has a bigger area-the circle or the square?

WORK MUST BE SHOWN TO EXPLAIN!

PLZ HELP!!

2007-10-02 14:13:46 · 2 answers · asked by Anonymous in Mathematics

2007-10-02 14:13:38 · 3 answers · asked by hot mocha with euro spices 1 in Biology

explain?

2007-10-02 14:07:21 · 5 answers · asked by Anonymous in Earth Sciences & Geology

Thanks!

2007-10-02 14:07:00 · 4 answers · asked by Rachely 1 in Biology

perform the operation. siplify if possible...


(x+1) over (4x+8) - (x^2) over (4x^2-16)

2007-10-02 14:06:51 · 2 answers · asked by arod_69 1 in Mathematics

One of my classmates told me that if at least one of the products of the reaction (if it occurred) is a solid, liquid, or gas, that the reaction will happen, but that if all of the products are aqueous, then it won't occur. However, she also said she wasn't completely sure. Was she right?

2007-10-02 14:04:16 · 2 answers · asked by chucknorris=theman 2 in Chemistry

ok, you know when they say

in year 1996 the net income for such and such a family was $43,000 and now in 2007, it has risen to $60,000 (i just made up that statistic)

by how much percent did it raise? questions like those! how do i calculate to figure out that answer? what are the steps? please!!! i'm eager to know!!!!

2007-10-02 14:04:08 · 6 answers · asked by Anonymous in Mathematics

I really want to try and make crystals please help.

2007-10-02 14:03:56 · 1 answers · asked by Anonymous in Earth Sciences & Geology

i need help and its ergent this answer is due tomorrow morning at 7:00

2007-10-02 14:03:55 · 13 answers · asked by ash 2 in Mathematics

Zinc metal reacts with sulfur to produce a white powder of Zinc sulfide. If 65.4g of zinc reacts with 32.1g of sulfur to form the commpund, calculate how many grams of the compund can be produced from 20.0g of sulfur and enough zinc.

i did 65.4/32.1= 2.037
then 2.037 x20.0g= 40.7
thats as far as i got....

2007-10-02 14:02:56 · 1 answers · asked by Anonymous in Chemistry

why would you add the opposite if its subtaction

2007-10-02 14:02:49 · 8 answers · asked by Pooh-Bear 2 in Mathematics

I ... kinda solved this problem but I don't think I did it right though.

One chocolate has a mass of 3g. How many chocolates should be in a one-pound bag?

I got 151 and... had to round up for SigFig so I ended up having 200.... and it just doesn't look right...
Can anyone help me? Thank you

2007-10-02 14:00:14 · 1 answers · asked by melong_91 1 in Chemistry

1.What are 3 examples of Biotic factors,and 3 of Abiotic factors?
2.How are living things organized from large to small?
3. What is the niche & habitat for a mouse?
4. What is and example of and Autotroph, Heterotroph, carnivore, scavenger, omnivore, and decomposer?
5.What is an example of a parasite, commensalism, & mutualism relationship?
6. What is the difference between transpiration & evaporation in the water cycle?
7. What do we do as humans to add Co2 into the atmosphere?
8. What is an example of a living factor & how does it " limit" something?
9. What would you see in a community that is undergoing primay succession? secondary succession? and climax community?

2007-10-02 13:59:27 · 4 answers · asked by mujerlatina@sbcglobal.net 2 in Biology

Okay, so this is a circle equation:

xSquared+ySquared-5x+4y-13=0

I need to split it into two functions.

So, the question is: ... Begin by writing the circle as the union of two functions. Identify the functions that represent the top half and the bottom half of the circle.

Thanks. ♥BeautiifuLChick♥

2007-10-02 13:56:37 · 3 answers · asked by ♥Evee♥ 3 in Mathematics

How would you calculate the number of H atoms in this sample?

2007-10-02 13:56:07 · 4 answers · asked by Anonymous in Chemistry

He gave his friends these three clues to see if they could guess how much he had: The coins equaled 1 dollar, He had no more than 100 coins, he had at least one coin. What combination of coins could Fransisco have in his pocket.
I really need some help with this. I don't even know what they're asking. Please help and explain your answer. I need to know how to do it step by step. Thnx so much to ne one that can help I'm desperate

2007-10-02 13:55:14 · 5 answers · asked by Anonymous in Mathematics

There are different breeds of mice that are able to produce higher amounts of offspring at a time. I'm looking for the highest producers.

2007-10-02 13:53:04 · 4 answers · asked by Anonymous in Biology

The question asks me to draw a Bohr diagram of that atom that shows the number of neutrons, proton, electrons. How many electrons do I draw, and how many protons, and neutrons do I draw.

2007-10-02 13:52:31 · 3 answers · asked by Kenster102.5 6 in Chemistry

I've already proven f(x) is not differentiable at x by letting x assume values greater and less than 6. What I don't know how to find is the forumula for f '.

2007-10-02 13:52:17 · 2 answers · asked by glass_commander 2 in Mathematics

what happens to the momentum that he lost ?

2007-10-02 13:50:32 · 1 answers · asked by werewulf2000 2 in Physics

2007-10-02 13:50:32 · 4 answers · asked by mecutiepie4life 1 in Biology

And why?

2007-10-02 13:49:42 · 3 answers · asked by Anonymous in Chemistry

"... rug covers half the floor area of a room and leaves a uniform strip of bare floor around the edges." The rug is rectangular. Does that mean that there is a equal amount of space on each side of the rug, making the room rectangular? Its only the "uniform strip" bit that I don't really get.

2007-10-02 13:49:17 · 7 answers · asked by Anonymous in Mathematics

What makes it possible (structure-wise) to see analgesics under UV light?

2007-10-02 13:48:13 · 1 answers · asked by bdgurl5388 1 in Chemistry

A 250 kg log is pulled up a ramp by means of a rope that is parallel to the surface of the ramp. The ramp is inclined at 30.0° with respect to the horizontal. The coefficient of kinetic friction between the log and the ramp is 0.800, and the log has an acceleration of 0.700 m/s2. Find the tension in the rope

2007-10-02 13:46:47 · 1 answers · asked by Anonymous in Physics

2007-10-02 13:46:31 · 3 answers · asked by bwatson200 1 in Chemistry

This is a HS physics class, so its not going to be very hard.


A 0.18 kg ball is places on a compressed spring on the floor. The spring exerts an average force of 2.8 N through a distance of 15 cm as it shoots the ball upward. How high will the ball travel above the release spring?

Thanks!

2007-10-02 13:46:04 · 2 answers · asked by just me. 2 in Physics

A ball is thrown into the air by a baby alien on a planet in the system of Alpha Centauri with a velocity of 34 ft/s. Its height in feet after t seconds is given by:

y=34t - 22t^2 (t is squared)

A. Find the average velocity for the time period beginning when t=3 and lasting
.01 s:
.005 s:
.002 s:
.001 s:


B. Estimate the instanteneous velocity when t=3.

2007-10-02 13:44:48 · 1 answers · asked by m_mays89 2 in Mathematics

pleasee helpp it's for geography

2007-10-02 13:44:39 · 3 answers · asked by Stephaniee* 1 in Earth Sciences & Geology

I have a gigantic test tomorrow in chem and I cannot for the life of me figure out how to do these.. if you know how please do them and try to give me some detail as to what you did and possibly why?
Thanks!!

1. Write a net ionic equation for the reaction that occurs when aqueous solutions of hydrocyanic acid and ammonia are combined.

2.Write a net ionic equation for the reaction that occurs when aqueous solutions of acetic acid and ammonia are combined.

2007-10-02 13:44:10 · 2 answers · asked by SweetMandy01234 2 in Chemistry