Science & Mathematics - 11 February 2007

hey guys...i'm stuck on a physics question...can someone explain how this would be done?

two pipes of equal length are each open at one end. each has a fundamental frequency of 480Hz at 300K. In one pipe, the air temperature is increased to 305K. If the two pipes are sounded together, what beat frequency results?

thanks

2007-02-11 05:40:37 · 3 answers · asked by Anonymous in Physics

2007-02-11 05:40:32 · 1 answers · asked by Anonymous in Engineering

2007-02-11 05:39:59 · 3 answers · asked by Anonymous in Mathematics

Only 1% are true? Is that true or not?

2007-02-11 05:39:56 · 12 answers · asked by mrhoppy22 3 in Mathematics

How many potato batteries would be needed to power a circuit which requires 6V but a relatively small current?

random I know...

2007-02-11 05:39:56 · 3 answers · asked by dancer131 1 in Physics

So I'm frustrated with this one question that I can't figure out... anyone?

The collision theory of chemical reactions assumes that, for gas phase reactions:
a. reaction rates are approximately the same as molecular speeds
b. only energentic collisions occur
c. the rates is directly proportional to the number of collisions pers second.
d. reaction in the gas phase is always first order.
e. a chemical reaction occurs with every molecular collision

Thanks for the help!

2007-02-11 05:38:53 · 2 answers · asked by bigmanonthewall 3 in Chemistry

ok..i'm really confused here....what is the relationship between boiling point and vapor pressure? and then how does that relate to how well and object cools by evaporation


thanks!

2007-02-11 05:37:39 · 3 answers · asked by sandcastlesinair 1 in Chemistry

Does Evolution explain the existence of different genders .. Males and Females.

2007-02-11 05:35:58 · 8 answers · asked by Max D 3 in Biology

the choices are ... a) a primary alcohol b) a vicinyl diol c) an aldehyde d) a tertiary alcohol

this question is on my review sheet... i'm not positive of what the answer is does anyone know???

2007-02-11 05:35:57 · 1 answers · asked by Jon P 1 in Chemistry

(5)/(x^3-^3)+(3)/(x^2+xy+y^2).........please show your work and if possible explain in depth what you did with (x^2+xy+y^2) because i tried to factor it and i cant figure it out.

2007-02-11 05:35:27 · 1 answers · asked by music man 2 in Mathematics

2007-02-11 05:33:19 · 17 answers · asked by raj i 1 in Other - Science

2007-02-11 05:33:16 · 9 answers · asked by Anonymous in Zoology

2007-02-11 05:33:05 · 2 answers · asked by skforlife 1 in Engineering

I am really having trouble with my science essay. I cant think of wat that term is.

2007-02-11 05:32:58 · 3 answers · asked by ohshizclarissa 4 in Chemistry

what are the components of linear equation?
Like what does x, y etc. stand for??

2007-02-11 05:32:46 · 2 answers · asked by Yash Y 2 in Mathematics

no big words :)

2007-02-11 05:32:41 · 3 answers · asked by VC15 RULES 2 in Engineering

2007-02-11 05:31:06 · 2 answers · asked by skforlife 1 in Engineering

Modern food processing and refining used in packaging of food products decreases the magnesium and potassium contained in those foods. Name some symptoms shown by a person eating only refined foods.

2007-02-11 05:30:13 · 4 answers · asked by Cutie 4 in Chemistry

I have looked at the nextstar 60 with goto, and the skywatcher 114m which are about the same price.
Is is better to get a Goto telescope or learn the planets and stars the old way?
And which is the better scope out of these two or should i save more and get a better scope?
I am just starting off into astronomy and there are no local clubs where i live because i live out in the wilds!

2007-02-11 05:29:52 · 7 answers · asked by Anonymous in Astronomy & Space

in other word: what the integral function of the semicircle?

2007-02-11 05:29:51 · 2 answers · asked by scutex 1 in Mathematics

is their some guys studied in university with a bad grades?

2007-02-11 05:28:51 · 5 answers · asked by Anonymous in Mathematics

2007-02-11 05:28:49 · 12 answers · asked by Em 1 in Zoology

2007-02-11 05:27:32 · 1 answers · asked by Anonymous in Botany

a car travels at constant speed aroudn a circular trach whose radius is 3.2 km the car goes once around the track in 360 s what is the magnitude of the centripetal acceleration of the car?


please help me set this up so i can solve thank you sooo mcuh

2007-02-11 05:25:00 · 3 answers · asked by Anonymous in Physics

When you are given the name of certain molecules like BF3 and AsCl3 how do you know whick has weaker intermolecular dipole-dipole forces ???????????

2007-02-11 05:24:52 · 3 answers · asked by Anonymous in Chemistry

Problem: You have been invited to the emperor’s banquet. The emperor is a rather strange host. Instead of sitting with his guests at his large dining table, he walks around the table pouring oats on the head of every other person. He continues this process, pouring oats on the head of everyone who has not had oats until there I sonly one person left. This question is, where should you sit if you do not want outs poured on your head?

I found out some stuff
# of seats
2 seats= you should sit in seat # 2
3 seats= you should sit in seat # 2
4=4
5=2
6=4
7=6
8=8
9=2
10=4
11=6
12=8
13=10
14=12
15=14
16=16

I need to find a pattern here but I can’t figure it out can someone help me?
Best Answer gets 10 points!!!

2007-02-11 05:24:10 · 5 answers · asked by Anonymous in Mathematics

Hi
I have a typical concentration vs Absorption coefficient graph drawn on Excel.I got a straight line passing thro' the origin.How do I calculate the slope of this line.
Thanks

2007-02-11 05:21:39 · 5 answers · asked by mammaluv 2 in Mathematics

2007-02-11 05:19:32 · 11 answers · asked by stutart 1 in Zoology

I have to do an error calculation for an experiment using statistics. I found that d(Co*e^kt)/dCo = e^kt but I have no idea how to arrive at this answer on my own. Can someone explain how it's done?
(also d(Co*e^kt)/dt = Co*e^kt * k and d(Co*e^kt)/dk = Co*e^kt * t)

2007-02-11 05:17:11 · 2 answers · asked by jenstarr 4 in Mathematics

Identify the force that maintains the circular motion of the following:

A bicyclist moving around a flat circular track
A bicycle moving around a flat circular track
A bobsled turning a corner on its track

I think the first two are centripetal force and the last one is gravitational force but i'm not sure.

2007-02-11 05:16:23 · 2 answers · asked by strawberrylollipop12345 1 in Physics