Science & Mathematics - 23 November 2007

2007-11-23 02:00:58 · 8 answers · asked by Anonymous in Astronomy & Space

4rs-25s^2/2rs+3rs-20s^2

2007-11-23 01:59:09 · 3 answers · asked by Kat 1 in Mathematics

1)the carnival ride has a 2.0m radius and rotates once
each 0.90second

a)find the speed of a rider.
b)find the centripetal accleration of a rider
c)what produces this accleration?
d)when the floor drops down, riders are held up by friction. draw motion and free body up by friction. draw motion and free body diagrams of the situation
e)what coefficient of static friction is needed to keep the riders from slipping?

2007-11-23 01:51:15 · 1 answers · asked by peipei91189 1 in Physics

imagine an object of mass m oscillating, through a small angle, around an axis at point A, which is located a distance D away from the object's centre of mass, cm.
T is the period of oscillation.

how am i meant to show that this object's moment of inertia through the centre of mass, and parallel to the A axis, is given by

I = (MD/4π^2)(gT^2 - 4Dπ^2)

i havent got a clue how to do this, can it be clearly explained please?

thanks.

2007-11-23 01:39:37 · 3 answers · asked by fpa06mr 5 in Physics

about pravagya yogam and kaal sarpa yogam ragu in 11 th and ketu in 5th 4 benifics in 9th mithuna lagna sun in 8th sat mars in 6th

2007-11-23 01:38:33 · 2 answers · asked by deep 1 in Astronomy & Space

Learnt on my course that roughly 22% of all the species recorded are a type of beetle! Why is this?

2007-11-23 01:33:47 · 6 answers · asked by Moi? 3 in Zoology

I meen why not establish moon first before travel to Mars this way use moon as base is it me? why travel 6 months into unknown instead of a short distance to moon?. it serves more then a few purposes. The more travels to moon the more confident We as a people would be comfortable in space. and once established on moon can open to civilians like example ice truck transport folks in Alaska pay and use there expertise in extreme conditions to transport basic goods to folks already on moon.The job market would open up a whole new areas of jobs to fill. then we could finaly say we are space fareing people.

2007-11-23 01:30:57 · 11 answers · asked by NghtWolf 1 in Astronomy & Space

Robotic Landers landing on Mars use parachutes in order to slow them down before reaching the surface of Mars. With the air pressure being so low is it air or something else that makes using the parachutes effective?

Also can parachutes be used to land on any other body in Solar System except Earth and Mars?

2007-11-23 01:25:22 · 4 answers · asked by Tony W 4 in Astronomy & Space

my frend was sleeping over and we went to the family room to get some hot cocoa. We looked out the window and it was bright orange! at midnight! plus, the moon wasnt out that night. why was the sky orange at 12 am?

2007-11-23 01:20:45 · 10 answers · asked by Anonymous in Astronomy & Space

2007-11-23 01:19:46 · 5 answers · asked by nathan e 1 in Mathematics

Wet fluorescent Magnetic Particle test is done in circumferential butt weld joints including heat affected zones from inside: 100% "T" weld joints from inside, 00% weld joints for nozzles, 100% support columns - pad plate to shell: 100%. Why this is done in an LPG sphere? Is their any other method also to do this?

2007-11-23 01:17:56 · 2 answers · asked by Anonymous in Engineering

you know in calculus books when they want to estimate the volume of a shape in an interval like [a,b] they devide this interval into too many suintevals. then there will be too many rectangles. then they rotate each rectangle. and then they use cylinder's volume as a defined volume to find the total volume. (like an axiom)
my teacher said that in fact it's proven why the volume of a cylinder is that.
can you help me find it?

2007-11-23 01:17:05 · 3 answers · asked by amir 2 in Mathematics

An airplane is sighted at the same time by two ground observers who are 3 miles apart and in front of the airplane. They report the angles of elevation as 13 and 24 . How high is the airplane?

2007-11-23 01:14:33 · 5 answers · asked by labelapark 6 in Mathematics

noting that coffee never tastes as good as it smells.....

Do the aroma-producing compounds responsible for the aroma of freshly made coffee
evaporate, into the air, at a lower temperature than what remains for drinking, in the cup as liquid, and is it possible, to fractionally distill JUST THIS particular fraction at a temperature lower than 100 deg C, to obtain a liquid that finally actually does taste like it smells?

(could those of you who have access to the proper glassware please do this, taste it and let me know)

2007-11-23 01:13:50 · 1 answers · asked by Anonymous in Engineering

Because thioglycolic acid is diprotic (it has two H+ to donate) am I right in assuming that its redox potential is dependent on pH even though the half reaction does not have H+ or OH- transfer when it is reducing?

2007-11-23 01:12:26 · 2 answers · asked by Anonymous in Chemistry

please decribe in simple way.

2007-11-23 01:02:31 · 5 answers · asked by Anonymous in Biology

Hamsters and humans manage quite well without one. For humans it would be a real disadvantage on public transport in the rush hour!

2007-11-23 01:01:00 · 9 answers · asked by Anonymous in Zoology

Just pour your answer or views

2007-11-23 00:49:46 · 8 answers · asked by Anonymous in Biology

2007-11-23 00:49:01 · 8 answers · asked by clarty 1 in Earth Sciences & Geology

2007-11-23 00:43:02 · 4 answers · asked by Anonymous in Mathematics

i'm serious, when you look at how crazy, irrational, and diluted these people are, you can't help but wonder if maybe some disease has invaded their mind and taken over their thought processes. Then, it gets passed onto children, and so on.

What do you think?

2007-11-23 00:40:51 · 31 answers · asked by Superior Intelligence 3 in Parapsychology

2007-11-23 00:30:59 · 3 answers · asked by dk 1 in Biology

Are you as smart as a fithgrader?

2007-11-23 00:29:49 · 7 answers · asked by Mary J 1 in Astronomy & Space

Does anyone know what the redox half reaction equation is when thioglycolic acid (HS-CH2-CO2H) is acting as a reducing agent? And is the reaction dependent on what is being reduced?

Thanks

2007-11-23 00:27:32 · 1 answers · asked by Anonymous in Chemistry

Or can they spin around larger stars?

(And is our sun always motionless?)

2007-11-23 00:25:17 · 5 answers · asked by Anonymous in Astronomy & Space

A photographer points a camera at a window in a nearby building forming an angle of 42 with the camera platform. If the camera is 52 m from the building, how high above the platform is the window, to the nearest hundredth of a meter?

Thanks.

2007-11-23 00:19:21 · 7 answers · asked by labelapark 6 in Mathematics

Is there a minimum size a natural satellite must be in order for it to be considered a moon? After all the billions of rocks/ice that make Saturn's rings for example are all natural satellites but they are not all moons.

2007-11-23 00:16:36 · 6 answers · asked by Tony W 4 in Astronomy & Space

2007-11-23 00:09:14 · 17 answers · asked by Brian Lara 1 in Geography

I do know how to solve when an equation is like this :6x-3y=21 and2x+3y=19 where the +3y and -3y cancelled out each other and become zero.
What about an equation like this:6x-5y=21 and 2x+3y=19. find x and y.
please teach me how to solve this kind of equation

2007-11-23 00:07:51 · 15 answers · asked by Omar 1 in Mathematics