Science & Mathematics - 3 November 2007

2. Given f = 255 Hz, what is ω?
________________ [rad s-1]
Answer with Five Sig Figs or N/A if appropriate.

I GOT 1602.2, IS THAT RIGHT???

ALSO:

6. Given ω = 690 [rad s-1], what is the linear frequency?
____________ [Hz]
Use Three Sig figs.

HOW WOULD YOU DO THIS ONE?? PLEASE EXPLAIN, THANKS

2007-11-03 11:10:41 · 1 answers · asked by Anonymous in Physics

2007-11-03 11:06:47 · 6 answers · asked by Anonymous in Mathematics

My friends and i were talking about it in school yesterday and we were not sure if it was real or not so like if you really know if it's real or not plz do tell

2007-11-03 11:02:49 · 14 answers · asked by Anonymous in Parapsychology

here is my problem, and I have tried to figure it out but i cant. The furthest i got was trying the sum of squares which didn't work out because I had a cubed left and the answer didn't fit into what they asked. So,

The transformation x=z - b/3a converts the cubic equation ax^3 + bx^2 + cx + d=0 into one of the form z^3 + 3Hz + G=0. Find H and G in terms of a, b, c, d (Someone help this is driving me crazy!!!)

2007-11-03 10:58:23 · 2 answers · asked by busy bee 2 in Mathematics

How is it possible to do this?

The total electric current in the wire leading to a group of 2 resistors in parallel connection is given by the formula: IT = (V/R1) + (V/R2) where IT = total electrical current, V = potential difference, and R1 and R2 are two resistances.

IT = 420/3x

V = 120

R1 = 15

R2 = 2x - 4

Find the values of IT.

The smaller value of IT is ____
The larger value of IT is ____

2007-11-03 10:57:17 · 2 answers · asked by Anonymous in Mathematics

i have no basic maths and when it comes to p-values i get a bit confused about what figures are greater than 0.005 and less than 0.005, could someone give me some examples of these and please refrain from any rude comments thanks

2007-11-03 10:55:07 · 2 answers · asked by minky k 1 in Mathematics

Can I calculate tonicity with molarity instead of osmolarity when I'm dealing with glucose and water?
I'm trying to calculate the tonicity of a fruit or vegetable w/glucose. I read that since glucose still retains its molecular structure in water, it is okay to use molarity instead of osmolarity.
I'm still a little bit confused about tonicity. Is there a specific quintative unit to describe tonicity or is it just classified into isotonic, hypertonic and hypotonice? So how would I determine the tonicity of a certain fruit or vegetable?

And which fruit or vegetable has a good amount of glucose?

2007-11-03 10:52:55 · 2 answers · asked by Anonymous in Biology

2007-11-03 10:48:54 · 18 answers · asked by Anonymous in Medicine

1) A pile of 10 000 sheets of the paper used in a book is one metre high. Work out the thickness of one sheet of paper in metres, writing your answer in standard form.



2) If the number 3.52 times 10^-7 is written out in full, how many zeros follow the 2 ???

3) If the number 6.2 times 10^-7 is written out in full, how many zeros would there between the decimal point and the 6?

4) Write in order of size, smallest first:

p= 5 times 10^5
q= 6 times 10^4
r= 8 times 10^-6
s= 25 000

5) Which of the following has the largest volume if
x= 2 times 10^4
and y= 2 times 10^-2

a) xy

b) x^2 (x squared)

c) x/y (x over y)

d) 1/y^3 (1 over y cubed)

???

2007-11-03 10:47:07 · 6 answers · asked by Anonymous in Mathematics

2007-11-03 10:43:13 · 7 answers · asked by John 4 in Mathematics

Well I'm writing an essay about how religion supports the status quo and that it is a conservative force on society. So, one example I want to use is the fact that ______ discovered that the world is round and rotates around the sun, but people did not want to accept that because they were scared people will lose faith in religion..blah bllah blah..so i need to know who that person was.
thanks!

2007-11-03 10:40:59 · 13 answers · asked by 0000 3 in Astronomy & Space

Sooo just a question that i've often wondered the answer to.

Say someone is having a bath (just pure water though) and they decide to mess about underwater. And they exhale whilst underwater.

Now when we exhale, we produce carbon dioxide gas. And carbon dioxide gas makes a solution acidic. So, if said person exhales underwater enough, is it possible that they are now bathing in an acidic solution. And is this detrimental to their health?

Very strange question, i know. But im curious. Anyway, thanks. xxx

2007-11-03 10:38:48 · 3 answers · asked by darkenedenvy 2 in Chemistry

A 100.0 kg commuter is standing on a train accelerating at 3.70 m/s^2. What coefficient of friction must exist between the commuter's feet and the floor to avoid sliding?

Can anyone help me with this? Can you show me how to solve this, or even what the answer is? Help! Thanks a lot.

2007-11-03 10:35:28 · 1 answers · asked by ☺♠JonasJay♫♦ 5 in Physics

every year the Uk government spends almost 200 thousand million pounds on schools. Write this number in standard form.



Please explain to me how to do it and the answer. thanks

and how to you write 200 thousand million ??

2007-11-03 10:34:58 · 10 answers · asked by Anonymous in Mathematics

I've heard that we have discovered planets outside our solar system because of the shadow they cast when they pass in front of their sun. Can we be missing planets whos orbit does not line up with their sun and our point of reference? Are there other ways to detect these planets?

2007-11-03 10:32:32 · 6 answers · asked by Buddha13 4 in Astronomy & Space

A 1500.0 N force is exerted on a 200.0 kg crate to move it across the floor. If the coefficient of friction is 0.250, what is the crate's acceleration?

I need some guidence in this one. Thanks...please!

2007-11-03 10:31:12 · 1 answers · asked by ☺♠JonasJay♫♦ 5 in Physics

just looking for a legal buzz

2007-11-03 10:31:11 · 2 answers · asked by <TS> 1 in Astronomy & Space

This hint was given: Remember the acceleration of Earth's gravity

2007-11-03 10:29:32 · 4 answers · asked by ♥Team Edward♥ 2 in Other - Science

B= 39.3 degrees, C= 4.3 mm

2007-11-03 10:27:39 · 4 answers · asked by Cary C 6 in Mathematics

2007-11-03 10:25:07 · 9 answers · asked by dwadefranchizemia03 5 in Physics

2007-11-03 10:24:06 · 2 answers · asked by hpfan 1 in Zoology

Hey guys. I am having trouble with number one. I am lost on it. On number 2, I said No and 2L that right? Thanks

1) A gas of unknown molecular mass was allowed to effuse through a small opening under constant pressure conditions. It required 113 s for 1.0 L of the gas to effuse. Under identical experimental conditions it required 31 s for 1.0 L of O2 gas to effuse. Calculate the molar mass of the unknown gas. (Remember that the faster the rate of effusion, the shorter the time required for effusion of 1.0 L; that is, rate and time are inversely proportional.)

2)Suppose you are given two flasks at the same temperature, one of volume 2 L and the other of volume 3 L. In the 2-L flask the gas pressure is X atm, and the mass of gas in the flask is 4.8 g. In the 3-L flask the gas pressure is 0.1X, and the mass of gas is 0.36 g.
(a) Do the two gases have the same molar mass?
Yes
No
(b) If not, which contains the gas of higher molar mass?
Gas in 2-L
Gas in 3-L

2007-11-03 10:21:44 · 1 answers · asked by Reviction 1 in Chemistry

this sounds stupid.. but when you see a swirling pile of leaves is it classed as a (sort of) tornado?? and in the uk do tornadoes ever touch down only i cant find a single video of a uk touchdown on youtube??

THANKS

2007-11-03 10:19:26 · 5 answers · asked by jamesington 2 in Weather

What is the Pythagoras switch and does this have anything to do with it? http://youtube.com/watch?v=cWpgJJnUEvo

2007-11-03 10:18:22 · 1 answers · asked by John 4 in Mathematics

okay i need 2 oragisms in the tropical rainforest that illustrate mutualism, commensalism and parasitism. ......... please i really need help asap
winner - i will get u points one way or another

2007-11-03 10:17:32 · 3 answers · asked by Anonymous in Earth Sciences & Geology

-x^2+3x+5x=-6+5x

THis has to =0 but taking the 5x from the right to the left side makes the x terms=0. How is this question done I am unsure how to approach this.

2007-11-03 10:16:10 · 7 answers · asked by Anonymous in Mathematics

I appreciate your help

2007-11-03 10:14:15 · 10 answers · asked by nygirl 1 in Medicine

I read the article about it and that you can see it with the naked eye. In which direction is it?? Thanks!

2007-11-03 10:12:47 · 4 answers · asked by Anonymous in Astronomy & Space

Tan X -= 0.67


Not X is a symbol of 0 with a line thru the middle.

2007-11-03 10:11:30 · 2 answers · asked by Cary C 6 in Mathematics

I’m looking in to careers in Marine Biology or Zoology when I graduate. I’ve already thought about zoos and aquariums, but what are some other good animal hands on careers! Any good ideas help! Thanks!

2007-11-03 10:10:30 · 4 answers · asked by Anonymous in Zoology