Science & Mathematics - 25 September 2007

A 2kg object experiences a centripetal force of 32 N while traveling in a circle with a radius of 1 m. What is the velocity of the object?

2007-09-25 10:48:50 · 1 answers · asked by Anonymous in Physics

suppose an object has an initial velocity of 15m/s, at an angle of 30 degrees from the x-axis. what is the maximum height the object will go?

2007-09-25 10:46:38 · 1 answers · asked by mike b 1 in Physics

How do the test on known solutions containing cations and anions make it possible to identify the cations or anions in an unknown substance?

2007-09-25 10:44:05 · 2 answers · asked by RogerDodger 1 in Chemistry

Basically, the Big Bang theory tells that in the beginning of the universes creation it was extremely dense. Whats puts the bang in the Big Bang theory is that it explodes and expands infinitively outwards, which is what we call inflation. The theory supposedly explains how the universe was created.

What doesn't make sense is that the Big Bang theory is supposedly back by the theory of general relativity. In the theory of general relativity, gravity is explained. Basically its like holding a towel(space) stretched and placing an orange(mass) on the towel. The indent the orange makes on the towel is like a mass' effect on space, which the indent is what makes gravity, gravity. Its why massive objects, such as planets, have gravity.

Read on...

2007-09-25 10:43:13 · 11 answers · asked by Anonymous in Astronomy & Space

2007-09-25 10:39:53 · 4 answers · asked by sammyrulesforever 1 in Chemistry

Find the tension in each cable supporting the 540 N cat burglar in Figure P4.15. Assume the angle of the inclined cable is 36.0°.

http://www.webassign.net/sf5/p4_11alt.gif

inclined cable:
horizontal cable:




and also:

A van accelerates down a hill (Fig. P4.71), going from rest to 30.0 m/s in 7.10 s. During the acceleration, a toy (m = 0.350 kg) hangs by a string from the van's ceiling. The acceleration is such that the string remains perpendicular to the ceiling.
http://www.webassign.net/sf/p4_71.gif
angle = 25.5
find the tension of the string:


=D Thanks much!

2007-09-25 10:39:21 · 2 answers · asked by Bill 1 in Physics

if you were to boil distilled and tap water and you thought distillled water would boil faster

2007-09-25 10:37:40 · 3 answers · asked by Anonymous in Biology

one of the headings i have to fill in are: conjunction with other planets./.....what does that mean?

2007-09-25 10:37:30 · 2 answers · asked by Anonymous in Astronomy & Space

2007-09-25 10:36:20 · 7 answers · asked by roan 2 in Astronomy & Space

Can you please answer anything you can about it in like 7th grade form. Thanks!

2007-09-25 10:35:51 · 4 answers · asked by Anonymous in Astronomy & Space

cOMPARE ALLOTROPES AND ISOTOPES OF CARBON?

aND PLS NAME AND DESCRIBE BRIFLY SOME ISOTOPES USED IN THE FIELD OF MEDICINE...






PLEASE!!! IM A NURSE AND IVE GOT A TEST TOMORROW. THIS TOPIC IS THE ONE I DONT UNDERSTAND. OKI?

2007-09-25 10:34:49 · 1 answers · asked by Anonymous in Chemistry

2007-09-25 10:33:59 · 4 answers · asked by MK8131 1 in Weather

In a skating stunt known as "cracking-the-whip," a number of skaters hold hands and form a straight line. They try to skate so that the line rotates about the skater at one end, who acts as the pivot. The skater farthest out has a mass of 80.0 kg and is 4.90 m from the pivot. He is skating at a speed of 5.40 m/s. Determine the magnitude of the centripetal force that acts on him.

2007-09-25 10:33:27 · 1 answers · asked by mysterypenguin12 1 in Physics

line across the graph would indicate ______ a. no motion b. constsnt speed c. steady accelaration d. maximum speed

2007-09-25 10:32:50 · 3 answers · asked by yakira v 1 in Physics

1
- x 2
3


(one third times 2)
i need someone to really break it down for me, and really explain as well as they possibly can
thanks=)

2007-09-25 10:31:23 · 9 answers · asked by Anonymous in Mathematics

How would I solve the following using partial fraction reduction to find f(t):

F(S) = s / (s+1)^2

Thanks!

2007-09-25 10:30:17 · 2 answers · asked by Anonymous in Mathematics

i decided to get a green tree frong and i need to know what i need to make a comfy enviroment for him...please post pics if possible,

2007-09-25 10:29:48 · 1 answers · asked by Anonymous in Botany

2007-09-25 10:28:26 · 3 answers · asked by emma3 2 in Earth Sciences & Geology

2007-09-25 10:24:05 · 1 answers · asked by jaredmowbray2008 2 in Physics

In a purely inductive AC circuit, L= 250mH and the r.m.s voltage is 150V.

2007-09-25 10:22:50 · 1 answers · asked by Anonymous in Physics

express the answer in intervals.
*****intervals as in inf and cup signs*****

2007-09-25 10:22:29 · 1 answers · asked by Phuong w 1 in Mathematics

Consider the following subspaces of F^5 (where F is a field):

W1= { (a1, a2, a3, a4, a5) : a1=a2 + a4, a3=a5}, and
W2= { (a1, a2, a3, a4, a5) : a1 = a3 = a4}.
1. Describe the intersection of W1 and W2 and find a basis for this subspace.
2. Use the dimension formula to show that W1 + W2 = F^5
3. Starintg with the basis in (1) for the intersection of W1 and W2, find bases for W1, W2, and use them to find a basis for F^5.
Please give reasons.

2007-09-25 10:21:18 · 3 answers · asked by Fred 1 in Mathematics

2007-09-25 10:19:43 · 1 answers · asked by Anonymous in Engineering

How do they work differently through the body. If it does the same thing how can they sell as two different compounds? Please cite your refferences. Thanks alot!

2007-09-25 10:18:56 · 0 answers · asked by rich t 1 in Medicine

A lion eats a zebra within 1 hour
A jaguar eats a zebra within 2 hours
A hyena eats a zebra within 6 hours

How long would it take if all three predators nicely ate the same zebra all at once?

I know this sounds stupid, but it's actually part of my math homework and I can't figure it out! Drives me crazy!

Please help me!

2007-09-25 10:18:43 · 4 answers · asked by .:: me ~* 3 in Mathematics

Like felt spirits, seen ghosts, or anything like that?

2007-09-25 10:18:07 · 16 answers · asked by Jynx™ 2 in Paranormal Phenomena

and why do substances butn in the air?

2007-09-25 10:16:17 · 3 answers · asked by Lauren 1 in Chemistry

2007-09-25 10:13:19 · 6 answers · asked by teresam3kids 1 in Biology

Which of the following would produce a basic aqueous solution?

A. P4O10
B. KCl
C. CO2
D. NH4Cl
E. none of these

2007-09-25 10:13:16 · 2 answers · asked by ChemChic 1 in Chemistry

The formula for the Periodic Time is T=2pi/w
How do I derive this result.
I know that x=A(Sin wt +e)
I think if I find the period of the above equation I'll get the answer
but how do I find the period?
If some of you are out of context
x=Extension
A=Amplitude

2007-09-25 10:11:43 · 1 answers · asked by alanjb 1 in Physics