Science & Mathematics - 20 November 2006

i don't know calculate this integral..

2006-11-20 03:38:52 · 2 answers · asked by Anonymous in Mathematics

A confidence interval estimate for the means is (3,9). If the level of confidence is .95, the sample size is 36, then determine
a) the maximum margin of error
b) the standard deviation
c) the sample mean

I'm stumped

2006-11-20 03:38:52 · 3 answers · asked by srt927 1 in Mathematics

I remember reading this in a magazine somewhere, i think it was Omni magazine but it said that light in space took a few billion light years to reach the end of space.And where would our starting measurements be taken earth or the beginning of space?

2006-11-20 03:38:10 · 9 answers · asked by zionistequalsnazi 2 in Astronomy & Space

I would like to build something that is not lethal and that I can get shocked with and not kill me. Is that possible ? And if so how ?

2006-11-20 03:29:31 · 1 answers · asked by The Diver 2 in Engineering

what is that acroynym thing you use to remember the order of the
planets?

2006-11-20 03:29:23 · 4 answers · asked by ~Hanan~ 1 in Astronomy & Space

2006-11-20 03:28:10 · 19 answers · asked by kim a 1 in Geography

How does the catalyst decreases the activation energy of a chemical reaction

2006-11-20 03:26:39 · 4 answers · asked by kms 1 in Chemistry

2006-11-20 03:25:09 · 13 answers · asked by garry s 1 in Geography

2006-11-20 03:23:05 · 20 answers · asked by nash c 1 in Weather

2006-11-20 03:21:48 · 2 answers · asked by goring 6 in Physics

2006-11-20 03:20:53 · 1 answers · asked by tina 1 in Earth Sciences & Geology

On his drive to work, Leo listens to one of three radio stations A, B, or C. He first turns to A. If A is playing a song he likes, he listens to it; if not, he turns to B. If B is playing a song he likes, he listens to it; if not, he turns to C. If C is playing a song he likes, he listens to it; if not, he turns off the radio. For each station, the probability is 0.30 that any given moment the station is playing a song he likes. On his drive to work, what is the probability that Leo will hear a song he likes?

2006-11-20 03:20:47 · 3 answers · asked by ThinkProb 1 in Mathematics

Wei drives 24 miles to school on both rural and city roads. He candrive 45 miles per hours on rural roads and 354 miles per hour on city streets. It takes him about 40 min. to comute to school. how much time does he drive on rural routes? how much time does he drive on city streets?

2006-11-20 03:18:38 · 2 answers · asked by Erica C 1 in Geography

2006-11-20 03:18:38 · 7 answers · asked by Andreea D 1 in Zoology

A uniform solid disk with a mass of 32.3 kg and a radius of 0.264 m is free to rotate about a frictionless axle. Forces of 90.0 N and 125 N are applied to the disk.
(a) What is the net torque produced by the two forces? (Assume counterclockwise is the positive direction.)

(b) What is the angular acceleration of the disk?

2006-11-20 03:17:01 · 1 answers · asked by Jim E 1 in Physics

2006-11-20 03:16:35 · 6 answers · asked by bryantboy32 2 in Physics

Is it truth that the ASTM is very difficult to use???

2006-11-20 03:16:27 · 3 answers · asked by Bejeweled22 2 in Engineering

A CD has a mass of 17 g and a radius of 6.0 cm. When inserted into a player, the CD starts from rest and accelerates to an angular velocity of 23 rad/s in 0.86 s. Assuming the CD is a uniform solid disk, determine the net torque acting on it.

2006-11-20 03:15:53 · 1 answers · asked by Jim E 1 in Physics

A hiker, who weighs 915 N, is strolling through the woods and crosses a small horizontal bridge. The bridge is uniform, weighs 4055 N, and rests on two concrete supports, one at each end. He stops one-fifth of the way along the bridge. What is the magnitude of the force that a concrete support exerts on the bridge at each end?
(a) near end

(b) far end

2006-11-20 03:14:58 · 2 answers · asked by Jim E 1 in Physics

another monday morning thinker

2006-11-20 03:13:47 · 8 answers · asked by Anonymous in Physics

think about this one it could be a tough one

2006-11-20 03:11:26 · 10 answers · asked by Anonymous in Other - Science

I don't want to tax my brain to do the figuring, and I know someone out there will have the answer!

2006-11-20 03:10:32 · 6 answers · asked by polkadot5355 2 in Other - Science

2006-11-20 03:10:26 · 7 answers · asked by Anonymous in Physics

2006-11-20 03:09:44 · 4 answers · asked by Anonymous in Chemistry

Assume earth is a sphere with radius OP=OE=3960 miles.
1. distance from 33, 57'N to equator
* If you could provide a short explanation I would really appreciate it. I have been stuck on this problem for quite some time. THANK YOU

2006-11-20 03:07:54 · 1 answers · asked by Anonymous in Geography

2006-11-20 03:06:28 · 4 answers · asked by Anonymous in Earth Sciences & Geology

2006-11-20 03:05:57 · 1 answers · asked by ANGELIC F 1 in Chemistry

i was thinking if someonesolved it for me (at least once) then i will get an idea how it works and know how to work the problem so heres the problem, i was trying to find the voltage discharge in a cpapcitor and i found the formula and i couldn't figure it out so here you go

V=v(e^t/T)
the instintanious voltage is equal to the initial voltage times exponent to the power of time over tau

and now for the details
the capacitor has the capacitance of 80uf and has a rated voltage of 330v and the battery i am charging the capacitor with has 1.5 volts and 5.0 amps and i wanted to see how much the capacitor discharges in 1 second

2006-11-20 03:05:19 · 4 answers · asked by macgyver 1 in Engineering

Need it! it's urgent!

2006-11-20 03:04:41 · 2 answers · asked by anitokyomics 2 in Chemistry

2006-11-20 03:03:17 · 4 answers · asked by Anonymous in Engineering