Science & Mathematics - 1 January 2007

PLEASE HELP ME! this is an essay question on my bio take home test...PLEASE! IM SOO LOST!!!

2007-01-01 06:51:44 · 6 answers · asked by Rach 1 in Biology

Assume ideal conditions for the apparatus illustrations in the picture. What is the acceleration of the system if...


(a) m1 = 0.25 kg, m2 = 0.50 kg, and m3 = 0.25 kg

(b) m1 = 0.35 kg, m2 = 0.15 kg, and m3 = 0.50 kg

I made a quick version of the picture on paint, http://www.geocities.com/grouchy187/picture.bmp

Any help would be appreciated, thx in advance.

2007-01-01 06:49:28 · 5 answers · asked by grouchy187 2 in Physics

Carly has $394. She buys a makeup kit for $45. Then she goes to the shoe store and buys a pair of sneakers for $35. Then she gives her boyfriend Michael $28 for a speedo he wants. Next, she goes to see a movie with him and admission is $6 per person. Michael wants popcorn and candy large sized which comes to $8.50. After the movie, Carly wants to buy a jacket for $89. How much money doe Carly have now?

2007-01-01 06:46:15 · 9 answers · asked by Cuddly Lez 6 in Mathematics

i was wondering if anyone could help me with explaining how to do some of these problems..thanks soo much!



1. When is the function concave up, if f'(x)=(x-2)^2(x-3)^2

2.Find the area of the largest rectangle with lower base on the x-axis and upper vertices on the parabola y=16-5x^2

3. A point moves on the curve 6x^2-3y^2=18 so that its x-coordinate increases at the constant rate of 9 m/s. At what rate is the y-coordinate chaing when y=3 meters.

4.The acceleration of a particle moving along the coordinate line is 5+4t m/s^2. At t=0 the velocity is 5 m/s. find how far the particle moves from time t=0 to t=2.


5. A container with rectangular base, rectangular sides, and no top is to have a volume of 16 m^3. The width of the base is to be 2 m. When cut to size, material costs $27 per square meter for the base and $9 per square meter for the sides. What is the cost of the least expensive container?



THANKS FOR ANY OF YOUR HELP!

2007-01-01 06:43:27 · 2 answers · asked by Anna 2 in Mathematics

Which choice represents the correct order of activity for Group 17 elements?

(Note: > signifies more active than) and also, i'm not sure if activity means how reactive it is, but i'm pretty sure that's it.

1) iodine>bromine>chlorine>flourine
2) flourine>bromine>chlorine>iodine
3) bromine>iodine>flourine>chlorine
4) flourine>chlorine>bromine>iodine

thanks in advance for any help!

2007-01-01 06:43:11 · 4 answers · asked by Anonymous in Chemistry

2007-01-01 06:42:00 · 5 answers · asked by bluedragon9081 1 in Mathematics

Like a knife or an axe or something?

2007-01-01 06:40:58 · 4 answers · asked by Alice 2 in Engineering

2007-01-01 06:39:56 · 1 answers · asked by Anonymous in Chemistry

2007-01-01 06:38:34 · 2 answers · asked by Anonymous in Chemistry

2007-01-01 06:37:51 · 14 answers · asked by redneckwoman 1 in Mathematics

2007-01-01 06:37:29 · 5 answers · asked by bluedragon9081 1 in Mathematics

2007-01-01 06:33:53 · 1 answers · asked by Anonymous in Chemistry

How to convert vtg source into a current source when resistor is in parallel with the vtg source?help!!!!!!!!

2007-01-01 06:30:19 · 1 answers · asked by annapurna g 1 in Engineering

2007-01-01 06:29:30 · 7 answers · asked by bluedragon9081 1 in Mathematics

if no, explain your answer
if it is correct, then say "correct"

2007-01-01 06:28:36 · 7 answers · asked by ipodlady231 7 in Mathematics

this will help settle a long running argument.

2007-01-01 06:26:14 · 13 answers · asked by leetreenoboy 1 in Zoology

2007-01-01 06:25:20 · 18 answers · asked by ? 3 in Astronomy & Space

when working out center of pressure for a tank with a slope, do you need to use the sin x rule. or does this rule only apply to something submerged.

2007-01-01 06:25:15 · 2 answers · asked by Morfydd E 1 in Physics

okay, i totally SUCK at physics. so;

2. a 1.0-kilogram ball is dropped from the roof of a build 40. meters tall. what is the approx. time of fall? [neglect air resistance]

can you tell me what equation to use and what the given is? thanks.

2007-01-01 06:24:06 · 8 answers · asked by thomas<3 1 in Physics

2007-01-01 06:22:08 · 5 answers · asked by Anonymous in Other - Science

2007-01-01 06:21:49 · 5 answers · asked by Noonie 1 in Mathematics

americans don't spell words the same as aussis, or british, so stop correcting us

2007-01-01 06:20:07 · 15 answers · asked by rhino_man420 6 in Geography

I know that many science fiction shows may call them Luna and Sol but these are not official names like moons of other planets and suns in other solar systems.

2007-01-01 06:18:32 · 16 answers · asked by Barkley Hound 7 in Astronomy & Space

2007-01-01 06:17:20 · 4 answers · asked by Sarah M 1 in Earth Sciences & Geology

2007-01-01 06:16:05 · 23 answers · asked by sunnivabyrne 2 in Physics

The calendar day has 24 hours, whilst the Solar (Astronomical) day is exactly 23.56mins long. After 6 months you would have lost 12 hours (half a year =182 days * 4 / 60)

Therefore based on these simple caluculations, we would be 12 hours ahead of ourselfs. Where Day would be Night and Night would be Day? How comes we dont see the effects of this?

Also based on this accurate solar day of 23hours. 56mins, wouldn't we be gaining a day every year?

2007-01-01 06:15:09 · 7 answers · asked by hsduk101 1 in Other - Science

i need a science fair tpic and think this is a good idea but cant find any information on how to turn a piece of wood incombustible, i think it ends up turning into a rock or somehting. any suggestions?

2007-01-01 06:14:03 · 4 answers · asked by simplicity 2 in Chemistry

Find the distance from point (3,0) to the line y = -x

2007-01-01 06:10:47 · 4 answers · asked by Anonymous in Mathematics

2007-01-01 06:08:52 · 3 answers · asked by Anonymous in Mathematics

2007-01-01 06:07:14 · 3 answers · asked by Anonymous in Mathematics