Science & Mathematics - 28 November 2007

A car is traveling at 2.3 m/s and a mass of 250 g is hanging from the ceiling in the car on a string 1.2 m in length. What angle does the string make with the vertical?

2007-11-28 11:04:28 · 1 answers · asked by eric_morris9 2 in Physics

A car is accelerating at a rate of 2.3m/s^2. a mass of 250 g is hanging from the ceiling on a string 1.2m long. What is the angle that the string makes with the verticle

2007-11-28 10:54:20 · 1 answers · asked by Anonymous in Physics

The question is DOES MECHANICAL OR DECREASE THE SPEED OF CHEMICAL BREAKDOWN???
Thanks!
Celeste
ps please dont answer if you dont know the answer, please!

2007-11-28 10:54:01 · 2 answers · asked by ! 3 in Other - Science

Why is mass more useful than weight for measuring matter?

Also.. what property of matter is measured in cubic centimeters?

How are milliliters related to liters?

2007-11-28 10:51:15 · 3 answers · asked by Brittneyyyyyy 1 in Mathematics

2007-11-28 10:48:36 · 2 answers · asked by Lori J 1 in Geography

its about the sun

2007-11-28 10:47:31 · 6 answers · asked by Anonymous in Astronomy & Space

2007-11-28 10:46:52 · 4 answers · asked by Mykel D 1 in Mathematics

in this problem, the question only states to match the trigonometric question with the answer that is right.. I don't know which is the right answer and how to get the right answer. the expression: (sec (x) cos (x)) matches with which answer? A) -1 B) cos x C) cot x D) 1 E) -tan x F) sin x

2007-11-28 10:46:28 · 1 answers · asked by Isabelle31 1 in Mathematics

What things do we generally see everday that have alloys in them?

2007-11-28 10:45:59 · 2 answers · asked by Julie 2 in Chemistry

2007-11-28 10:40:37 · 6 answers · asked by Anonymous in Zoology

2007-11-28 10:40:14 · 3 answers · asked by Anonymous in Earth Sciences & Geology

How do u solve this problem

2007-11-28 10:32:55 · 1 answers · asked by ArmaniCode 1 in Physics

2007-11-28 10:30:37 · 6 answers · asked by Anonymous in Earth Sciences & Geology

Im doing a science fair project in school and i need to know a simple but accurate formula for R-Value. How do I find it? Is it also possible to do the R-Value formula with the metric system(centimeters and grams) instead of inches and feet? I really need to know the R-Value formula and fast so please help me!

2007-11-28 10:28:57 · 1 answers · asked by xx_Tina_xx 2 in Mathematics

ont he topic of bio here. i mean so some things absorb certain kinds of light and reflect another color, but what happens to the light that isn't absorbed?

2007-11-28 10:28:23 · 4 answers · asked by Anonymous in Astronomy & Space

Well, I don't intend this as a statement.
However, Belgian and Brit scientist (Liege & Surrey) kinda mapped the parts of the brain which are stimulated by... light. In short and very abruptly put, exposure to blue light makes you smarter (there were already known uses of this frequency in skin diseases treatment) and there already are preoccupations for utilizing blue light emanating electric bulbs in offices etc.
http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0001247
http://en.wikipedia.org/wiki/PLoS_ONE
http://en.wikipedia.org/wiki/Light_therapy
http://www.livescience.com/health/060201_blue_light.html

My question is - this stuff is relatively new but it seems to gain territory on the scientific fields. If someone would have talked about it let's say ten years ago, would he have been labeled as... just a fool? I mean, come on... light is just light, how could it have any influence on the brain?

2007-11-28 10:28:07 · 8 answers · asked by Mirko 7 in Parapsychology

OK so I have these questions but I also want to know how to do them. My teacher couldn't explain to me how to get the answers to these questions. Please help!

1. Work = 20N X 100m

2. 60J = 30N X distance?

3. 20J = force? X 2m

4. Work? = 10N X 500m

5. Work? = .2N X 600m

6. 5,000J = 500N X distance?

7. Work? = 82N X 76m

8. Work? = 820N X 205m

9. Work? = 20N X 0m

10. 200 W = 2000 J / Time?

11. 15 W = Work? / 10 sec

12. Power? = 56 J / 2 sec

13. Power? = 324 J / 18 sec

14. Power? = 500 J / 50 sec

15. Power? = 2,400 J / 60 sec

Thanks

2007-11-28 10:27:58 · 2 answers · asked by Anonymous in Physics

2007-11-28 10:27:42 · 1 answers · asked by jake1987ca 1 in Weather

...is there a door like in The Trueman Show?

2007-11-28 10:27:37 · 14 answers · asked by cheekybear 5 in Astronomy & Space

i need help with this math question its asking me to expand this, 4(x-6)

2007-11-28 10:27:32 · 9 answers · asked by Brooke J 1 in Mathematics

I need to know badly!

2007-11-28 10:26:31 · 4 answers · asked by Jess F 1 in Earth Sciences & Geology

how to solve s/s+2+s=5s+8/s+2

2007-11-28 10:26:27 · 3 answers · asked by Tiana S 1 in Mathematics

A factory has 6 machines,2 are modified, within a week problems are reported with 3 machines.

Assuming all machines are equally likley to give problems what is the probability that both of the modified machines are among the 3 with problems??


the answer is 0.20 i need to be shown how to get the answer

2007-11-28 10:25:25 · 1 answers · asked by Bob 2 in Mathematics

i need help on my homework.
who discovered the atom?
who thought that atoms took random paths?
and
who thought that atoms were hard dence spheers?
NEED HELP BY TODAY.

2007-11-28 10:22:40 · 2 answers · asked by Anonymous in Physics

i am haveing a hard time anwsering these questions and i hope someone on here can help me

1.Rocks are classified into families based on:

Color
How they were formed
Where they are found
Weight







2.Igneous rocks, like those that have erupted from a volcano, which are found on the surface are called extrusive rocks.

True
false

2007-11-28 10:21:49 · 3 answers · asked by MiSs MoM 2 in Earth Sciences & Geology

2007-11-28 10:21:22 · 3 answers · asked by Kevin 1 in Weather

What are the three ways that a docto can examine an organ?

Also, what organ absorbs all of the nutrients out of food and completes the process of food digestion.

2007-11-28 10:20:55 · 4 answers · asked by Anonymous in Medicine

its about the sun

2007-11-28 10:18:08 · 7 answers · asked by Anonymous in Astronomy & Space

if anyone can help/break this down for me....THANKYOU
Find the first derivative:

1) (x^2)/tanx
2) cosx + (x^2)
3) 3cscx
4) 2cos(x^2)/(x^3)
5) x^2 + (sin4x/2)

2007-11-28 10:17:36 · 1 answers · asked by popasmile 1 in Mathematics

Each daughter demanded infinitely many dollar bills for christmas shopping spree. The banker knows, that neither investors nor his daughtres check serial numbres of the bills, they are concerned only about total amount.

How can the banker embezzle enough money to please all his daughters, and get away with it during the next audit?

2007-11-28 10:16:54 · 3 answers · asked by Alexander 6 in Mathematics