Science & Mathematics - 14 November 2007

A fishing pole is 2.00 m long and inclined above the horizontal at an angle of 20.0°. A fish is pulling on it with a force of 100N 37-degrees below the horizontal. What is the torque exerted by the fish about an axis perpendicular to the page and passing through the hand of the person holding the pole?

should I just use Torque = r * FsinX where X is 57-degrees

thanks!

2007-11-14 09:10:52 · 1 answers · asked by sccrsweetie 2 in Physics

a grinding wheel is in the form of a uniform solid disk of radius 6.94cm and a mass of 2.06kg. it starts from rest and accelerates uniformly under the action of the constant torque of 0.606N*m that the motor exerts on the wheel.

how long does the wheel take to reach its final operating speed of 1200 rev/min?

through how many revolutions does it turn while accelerating?

2007-11-14 09:10:13 · 1 answers · asked by Anonymous in Physics

a potters wheel (a thick stone disk of radius 0.500m and a mass of 125kg) is freely rotating at 50.0 rev/minute. the potter can stop the wheel in 6.00seconds by pressing a wet rag against the rim and exerting a radially inward force of 68.0N. find the effective coefficient of kinetic friction between the wheel and the rag.

2007-11-14 09:05:59 · 1 answers · asked by Anonymous in Physics

I would like to say before I ask that I do not beleive the moon landing conspiracy theories. I would also like to say that I am not trying to be biased in any way. My question is this: if the videos from the moon were in fact only played in half-speed on earth in a factory in Nevada, rather than one-sixth gravity i.e. the moon's gravity, how do NASA, and those against the theories explain this? Once again, just wondering since this idea intrigues me. Thanks for all answers, and try to make them mature.

2007-11-14 09:05:25 · 19 answers · asked by blank 4 in Astronomy & Space

2007-11-14 09:03:33 · 3 answers · asked by Ben 1 in Mathematics

Are flame tests valuable for detecting metal ions present in a mixture of metal ions?

Also, in class we did flame tests with sodium and potassium and then used cobalt glass to see the flame also. I don't understand why? How can this help identify the two elements?

2007-11-14 09:02:04 · 4 answers · asked by love*pink 3 in Chemistry

2007-11-14 09:00:40 · 6 answers · asked by proffesor 1 in Engineering

How do I verify this Identity using double and half-angle identies?

tan(x/2 - pi/4) = tanx - secx

2007-11-14 08:59:40 · 1 answers · asked by Oztac 1 in Mathematics

2007-11-14 08:59:21 · 8 answers · asked by swimmerforever 1 in Zoology

5h-h=16

10n=2n-6=42

2007-11-14 08:51:56 · 3 answers · asked by Claire H 1 in Mathematics

What is translational kinetic energy? What are some examples of it?

2007-11-14 08:50:03 · 0 answers · asked by Choice 2 in Physics

Three new ink cartridges cost $9 less than 5 new ink cartridges. Write and solve and equation to find the cost of each in cartridge!

2007-11-14 08:47:26 · 3 answers · asked by Anonymous in Mathematics

should it not just be the function? cos(t) / t or.. cos(x) / x please explain thanks

2007-11-14 08:45:01 · 2 answers · asked by Anonymous in Mathematics

We need to feed an aquarium with CO2, if we heat CACO3 to liberate CO2, the cold CaO could absorb CO2 from the air and be reheated to liberte more CO2?

2007-11-14 08:44:37 · 3 answers · asked by espiral 2 in Chemistry

2007-11-14 08:40:23 · 3 answers · asked by Tammy 1 in Chemistry

2007-11-14 08:40:06 · 2 answers · asked by gkoz316 2 in Mathematics

I know that this series converges, but I need an explanation of this. The series is from n=1 to infinity of (-1)^n+1(ln (n)/n)

2007-11-14 08:39:30 · 2 answers · asked by Dan H 2 in Mathematics

I need help i can't do this without help.

2007-11-14 08:37:35 · 24 answers · asked by Sarah S 1 in Mathematics

2007-11-14 08:30:16 · 32 answers · asked by Anonymous in Biology

2007-11-14 08:28:58 · 3 answers · asked by bug 2 in Mathematics

if a typical aspirin tablet contains 325 mg aspirin, how many tablets could you prepare from 2.1 g???

2007-11-14 08:28:45 · 9 answers · asked by sweetgirl78228 2 in Chemistry

One that could be used for experiments that should be tested in human blood but tested in animal blood first. Thanks :)

2007-11-14 08:28:22 · 7 answers · asked by Anonymous in Biology

This is a statistic question and the answer is 3.5 but i dont know how solve it to get that answer!! please help!

2007-11-14 08:25:56 · 2 answers · asked by Anonymous in Other - Science

Any other methods for sheep flaying are acceptable.But please be sure that it is used in Australia.

2007-11-14 08:18:33 · 3 answers · asked by pacopena 2 in Zoology

When I attempt to use linear approximation to solve for sin(47) I get a completely incorrect answer...

Here is what I did

sin(47) ~= sin(45) + cos(45)(47-45)

= (sqrt(2) / 2) + ( sqrt(2) / 2 )*(2)

= (3*sqrt(2)) / 2

= 2.12

Which is totally wrong... what am I missing?

2007-11-14 08:14:17 · 4 answers · asked by Theava 2 in Mathematics

If they have any value or could be used for a class I would love to donate them. Who or what kind of class should I look for ?

2007-11-14 08:11:11 · 9 answers · asked by La Cicada 4 in Earth Sciences & Geology

I've been on here for over an hour and it feels like 5 minutes.

2007-11-14 08:08:38 · 10 answers · asked by Anonymous in Paranormal Phenomena

metrology

2007-11-14 08:05:59 · 2 answers · asked by GUNA S 1 in Engineering

These are the 2 problems:
x-5y= -1
-2x+5y=-3

You need to find out the X and Y variables. There was no matrix or determinant, so I'm not sure how to do it. I tried doing it without them, and I got (-20, 1), but those numbers are wrong. If you know how to figure out this problem, please describe how you got it, so I can finish the rest of my homework.

2007-11-14 08:04:29 · 2 answers · asked by M. Rose 2 in Mathematics

To be more specific,We are looking to make power out of our wood stove.Since we burn it all winter,Why not use some of the heat to make a 12 volt charge,for storing into battery's.If ther is anybody that realy knows how it's done please responed.And if you dont keep it to yourself.Need real connections to make it happen...thanks

2007-11-14 08:02:12 · 2 answers · asked by jay v 1 in Engineering