Science & Mathematics - 20 November 2007

More physics questions I need help with..

A Ferris wheel rotates at an angular velocity of 0.24 rad/s. Starting from rest, it reaches its operating speed with an average angular acceleration of 0.030 rad/s^2. How long does it take the wheel to come up to operating speed? (Chapter 8)

2007-11-20 13:40:59 · 2 answers · asked by PinkyTrauma 2 in Physics

I need help with physics and I'll ask a million more trust me.

A motorcyclist is traveling along a road and accelerates for 4.50 s to pass another cyclist. The angular acceleration of each wheel is +6.70 rad/s^2, and, just after passing, the angular velocity of each is +74.5 rad/s, where the plus signs indicate counterclockwise directions. What is the angular displacement of each wheel during this time? (Chapter 8)

2007-11-20 13:40:27 · 2 answers · asked by PinkyTrauma 2 in Physics

I need helping working out Physics problems once again..

A string weed trimmer utilizes a length of nylon string that rotates about an axis perpendicular to one end of the string. The string rotates at an angular speed of 47 rev/s, and its tip has a tangential speed of 54 m/s. What is the length of the rotating spring? (Chapter 8)

2007-11-20 13:39:35 · 1 answers · asked by PinkyTrauma 2 in Physics

2007-11-20 13:38:52 · 4 answers · asked by hashem b 1 in Mathematics

Everyone knows that any number raised to the 0 power will equal one. The first person to answer why this is in the form of a mathmatical proof, gets the best answer..
Its fun

2007-11-20 13:36:41 · 9 answers · asked by ? 3 in Mathematics

2007-11-20 13:33:12 · 9 answers · asked by Anonymous in Weather

a. 9
b. 6
c. 3
d. 1

2007-11-20 13:32:33 · 6 answers · asked by ableego 7 in Mathematics

2007-11-20 13:24:36 · 6 answers · asked by sunshine_faith 2 in Chemistry

2007-11-20 13:24:29 · 1 answers · asked by ferk12 1 in Geography

A 20.0kg floodlight in a park is supported at the end of a horizontal beam of negligeble mass that is hinged to a pole. A cable at an angle of 30 degrees witht the beam helps to support the light. Find (a) the tension in the cable and (b) the horizontal and veritical forces exerted on the beamm by the pole.

Pls. explain how to do it!

Answers:
a)392N
b)H:339N (to right)
V:0

2007-11-20 13:24:12 · 2 answers · asked by boy101 3 in Physics

2007-11-20 13:24:11 · 6 answers · asked by __penguin__ 2 in Zoology

2007-11-20 13:23:15 · 3 answers · asked by Anonymous in Mathematics

I've kept slugs for ah-while now, and they layed LOADS of eggs! awww.... ( Can't you tell I love bugs? lol)
____*--*____
But, How am I supposed to keep baby slugs -_-
what do they eat and stuff?

NO: Saying things NOTHING along the lines of what I've posted. (And saying " Keeping slugs is horrid & stuff like that)

2007-11-20 13:22:30 · 4 answers · asked by Anonymous in Zoology

Note: Take East as the positive direction.
A 85kg fisherman jumps from a dock into a 130kg rowboat at rest on the West side of the dock.
If the velocity of the fisherman is 5.5m/s to the West as he leaves the dock, what is the final velocity of the fisherman and the boat? Answer in units of m/s.

Please help me with this, i cant figure it out, thanks in advance.

2007-11-20 13:22:15 · 4 answers · asked by Anonymous in Physics

QUICKLYY!!!!

2007-11-20 13:21:13 · 2 answers · asked by ~unused~ 2 in Biology

I asked this in the CORRECT catorgory, but no answers. I know we've got some eager minds here that can answer my question.

I'm looking for the smallest FM receiver I can plug into my car and speakers deep into the smallest spot I can get to in order to hide it so it won't get stolen again.

I plan on using an Ipod only to play my music through an FM transmitter.

so, any idea on the small radio for my car?
products? suggestions?

2007-11-20 13:20:52 · 2 answers · asked by Mercury 2010 7 in Other - Science

I'm a newbie in chemistry, so could someone state two properties of an element? (real question is: List the first elements of the periodic table. State 2 properties of each elements) but i know how to find the first 18.

Also...

Are the physical properties of the compound sodium chloride (table salt) an average of the properties of the elements it contains? Explain.

I won't playgarise (i hope i spelled that right) and i won't copy exactly what people say. I just need some help with it. My version of help is not just giving me the answer to write down. many thanks

2007-11-20 13:20:17 · 3 answers · asked by Fresh Prince 2 in Chemistry

help please with math

2007-11-20 13:17:30 · 4 answers · asked by La ilaha il Allah 2 in Mathematics

Let's face it:

At the rate that we're going, we are likely to lose about 50% of all species on earth are going to die by the end of the 21st century.

This figure will only increase as the earth warms up.

Is this a mass extinction that we humans have brought about on this earth?

Undoubtebly, events like the formation of the isthmus of panama about 3 million years ago, and the ice ages have had their effects, but we humans are now the dominant force in this.

Your thoughts?

2007-11-20 13:16:08 · 4 answers · asked by ch_ris_l 5 in Biology

A 12kg child on a playground swing moves with a speed of 7.5m/s when the 9m long swing is at its lowest point and the acceleration of gravity is 9.8m/s^2. How can I find the angle that the swing makes with the vertical when the swing is at its highest point?

2007-11-20 13:10:29 · 1 answers · asked by Shane 1 in Physics

:)
In every direction

2007-11-20 13:07:14 · 2 answers · asked by Nina Lista 1 in Physics

a friend phones to ask how to solve 6 - 3x = 18.
using only words to describe this prblem. Your answer must be worded sentence one is step one. Sentence two is the second step, etc. Use words like I added, subtracted, multplied , && divided both sides by something.

2007-11-20 13:05:54 · 6 answers · asked by Anonymous in Mathematics

whats the 5 numbers before the sequence
in other words fill out the blanks...
_ _ _ _ _ 1,1,2,3,5,8,13,21

the sum of 2 sums imediatly after it..

please help!
thankkks :]

2007-11-20 13:03:52 · 6 answers · asked by soccerhamfrog8 1 in Mathematics

A supertrain of proper length 190 m travels at a speed of 0.9c as it passes through a tunnel having proper length 90 m. How much longer is the tunnel than the train or vice versa as seen by an observer at rest with respect to the tunnel?

the answer is in meters

2007-11-20 13:00:38 · 2 answers · asked by Anonymous in Physics

math some one teach me how to classify my questions?

2007-11-20 13:00:32 · 7 answers · asked by La ilaha il Allah 2 in Mathematics

1. Find the polar coordinates of (32, -60) for r > 0.

[A] (-68, 298.1°)
[B] (68, 151.9°)
[C] (68, 241.9°)
[D] None of these


2. Find the polar coordinates of (-4, -4) for r > 0
[A] (8√2, 135°)
[B] (4√2, 315°)
[C] (4√2, 225°)
[D] None of these

3. Find the polar coordinates of (-12, -12) for r > 0
[A] (8, 135°)
[B] (12√2, 135°)
[C] (12√2, 315°)
[D] None of these


Thank you!

2007-11-20 13:00:21 · 2 answers · asked by Anonymous in Mathematics

what type of lava does it erupts?
last eruption,created when,how many times erupt?

2007-11-20 12:59:37 · 2 answers · asked by Anonymous in Earth Sciences & Geology

WARNING:This is for only paranormla beleivers to answer!Okay,well I keep seeing or feeling presences.Ever since I was 4 I was intouch with the other world.Or the afterlife you lot call it.I know a lot by now,but why have I been one of the soo many few taht ahve been slected to see visoins,dream vivid dreams,have my fears come true in my dreams,and all of that other nonsense?!I habe 4 main spirits,Lela a 6 or 7 year old girl,Galar a mexican soldier around 27 to 35,Rubert a 6 year old boy,and Aelx a 10 year old boy.Now they are the ones that messed with me since I was 4.And also when I answer other peoples questoins about why something happened the sprit that went to them talks to me,and I automatically type down what I hear.Can anyone guess why that happens?Please help!

2007-11-20 12:58:11 · 13 answers · asked by Anonymous in Paranormal Phenomena

what is th eleast possible value of the other number??i got 9 but not sure explain plzzz if you get the answer

2007-11-20 12:58:11 · 3 answers · asked by Anonymous in Mathematics

find the missing value to make the fractions equivalent 2/3 = x /15 is the missing # 30.Also,18/30 =s/5 ?is that one 1

2007-11-20 12:57:21 · 3 answers · asked by Harley 1 in Mathematics