Science & Mathematics - 6 January 2007

Cars on a certain roadway travel on a circular arc of radius r. In order not to rely on friction alone to overcome the centrifugal force, the road is banked at an angle of magnitude Q (theta) from the horizontal. The banking angle must satisfy the equation
rg tanQ= v^2
where v is the velocity of the cars and g= 32 ft/sec^2 is the acceleration due to gravity. Find the relationship between the related rates dv/dt and dQ/dt.

2007-01-06 11:16:37 · 3 answers · asked by lola 1 in Mathematics

I want to know about several places. Appreciate it! I'm a doctor (not in residency yet), but I've heard about surgery videos on the internet. I am going to do a surgery residency very soon so these videos will help me. Appreciate it!

2007-01-06 11:15:57 · 3 answers · asked by Jimmy 3 in Medicine

A fishing line is reeled in at a rate of 1 foot per second from a bridge 15 feet above the water. At what rate is the angle between the line and the water changing when 25 feet of line is out?

2007-01-06 11:15:53 · 2 answers · asked by lola 1 in Mathematics

2007-01-06 11:15:48 · 12 answers · asked by STORMY K 3 in Engineering

its for an eighth grade science fair topic..and umm we need to measure soething..is that the time when the candles stop burning?

2007-01-06 11:15:25 · 2 answers · asked by Anonymous in Chemistry

How did the concept of counted time come about? Why does everyone agree (worldwide) on 60 seconds to a minute,and why is the second, well, a second long? Also, what's the difference between atomic clock time and regular counted time from a five and dimes store's clock?

2007-01-06 11:15:20 · 3 answers · asked by Anonymous in Other - Science

Does Aut(F), the set of automorphisms of a field F, form a field under point-wise addition and multiplication of functions?

2007-01-06 11:14:55 · 2 answers · asked by Ed S 1 in Mathematics

2007-01-06 11:14:05 · 3 answers · asked by SeLeNa 1 in Weather

I have to express my answer in simplest form here is my equation

x^2
-----
x +4

+

11x +28
------------
x+4


Do I add the top line together and add the bottom line to get

x^2 +11x +28
-----------------
x^2 + 8 ????????

If so then what are the steps after this ?


Also I have to subtract this faction

5x-3
-------
6

minus

x+3
------
6


Your help is greatly appreciated ! :)

2007-01-06 11:12:39 · 7 answers · asked by CookFrNW 3 in Mathematics

2007-01-06 11:09:37 · 8 answers · asked by KoKo 1 in Zoology

Rewrite the ratio as a fraction in lowest terms. Include units if needed in the answer. Please explain how you came with the solution not just the answer:):):):):) Thanks a million!!

2007-01-06 11:09:30 · 10 answers · asked by Kayla 1 in Mathematics

2007-01-06 11:09:18 · 8 answers · asked by rania f 1 in Biology

need to research first before starting my experiment?

2007-01-06 11:08:14 · 3 answers · asked by littlemin5 3 in Biology

They are used to measure property sometimes...I don't know how else to describe it. It's on a long stick with a wheel at the bottom & it gives inches/feet. I need to know what it's called. THANKS! :)

2007-01-06 11:07:52 · 2 answers · asked by flmomfl 2 in Engineering

if it is, does that mean that it can cause pollution??? how? O.O i need the answer so badd.. T~T

2007-01-06 11:06:47 · 4 answers · asked by Jan Cheyanne P 1 in Chemistry

2007-01-06 11:06:31 · 7 answers · asked by rockabilly.betty 2 in Chemistry

I've heard somewhere that you can use magnets to slow down the countdown of a gas or electricity prepayment metre, therefor meaning you don't have to top up with money as often. true or false? fiction or real? I'm very curious (and tight! haha)

2007-01-06 11:04:37 · 4 answers · asked by Jens 1 in Engineering

how do you do it!?!? we have this homwork and our teacher hardly taught us sumthing and im stuck in number 2 which is phosphoric acid. when i looked up in the internet, they all dont tell how exactly it turned into H3PO4. does anyone how it turned out like this? and do you know any understandable rule for this?

to those who could answer,,,, THANX!!!!!!!!

2007-01-06 11:04:09 · 5 answers · asked by pweetyinpink05 2 in Chemistry

The answer is (x+1)^2+(y-3)^2=25. How did they get the radius 25?

2007-01-06 11:04:03 · 6 answers · asked by Anonymous in Mathematics

2007-01-06 11:03:35 · 3 answers · asked by ? 1 in Medicine

Given f(x)=x^2tanx, write an equation of the line tangen to the graph at x=pi/4

2007-01-06 11:03:12 · 2 answers · asked by Anonymous in Mathematics

What is in a Milkyway and Galaxy? What is the big bright light in the middle of the galaxy? I heard our solar system is on the outside of the galaxy or something

2007-01-06 11:02:50 · 15 answers · asked by mrxxbrian 2 in Astronomy & Space

One of our renters found a dead insect under their bed and they think it's an armadillo. Now we live in southern Illinois so I highly doubt it can be one. It is only an inch long, but it does look like an armadillo so I was just wondering if anyone knew what it could be? I've searched the internet and I haven't found anything yet. What type of bug or retile could thins thing be??Thanks!

2007-01-06 11:01:09 · 6 answers · asked by fun mom 5 in Zoology

The toy car can't be powered by a remote controller... it's got to move by itself.

2007-01-06 11:00:54 · 6 answers · asked by Crispidey 1 in Engineering

2007-01-06 11:00:48 · 21 answers · asked by Fool 2 in Engineering

I know foxes and penguins do, does anyone know what other animals stay together too?

2007-01-06 11:00:39 · 14 answers · asked by jackknowswhatitsat 1 in Zoology

I don't know function notation!!!!!!

2007-01-06 11:00:22 · 2 answers · asked by girl_pink 1 in Mathematics

this help our bodies to function properly???

2007-01-06 10:56:11 · 5 answers · asked by Hally berry 3 in Biology

2007-01-06 10:55:52 · 9 answers · asked by Anonymous in Astronomy & Space

When do they become a wood, or a forest? Who gives a ****?

2007-01-06 10:50:25 · 5 answers · asked by Anonymous in Botany