Science & Mathematics - 18 July 2007

Calculate the wavelength of radio waves if their frequency is 5x10^6Hz.
v=fλ
λ=v/f=(3 x 10^8)/(5x10^6)
= 60

So, my answer is 60. Is this correct?
Thanks for your help!!

2007-07-18 10:53:29 · 5 answers · asked by Chikita 1 in Physics

I am approximetly 140 CM, I would like to know what I am in feet, so I can figure out how much I should weight...this is not homework, but I thought it would be the best place to post this.

Thank You Very Much

2007-07-18 10:49:23 · 9 answers · asked by Anonymous in Mathematics

What's the deal with crop circles?

2007-07-18 10:48:28 · 5 answers · asked by Anonymous in Astronomy & Space

I'm supposed to derive this: y = e^(-8x) cos(3x)

I got -3sin(exp(x))exp(-8x) -8cos(3x)exp(-8x)

but its not right..any help would be appreciated.

2007-07-18 10:46:42 · 2 answers · asked by Anonymous in Mathematics

Is it greenbrier or brier? Do you spell it briar or brier?

2007-07-18 10:44:51 · 5 answers · asked by Strix 5 in Botany

2007-07-18 10:43:21 · 4 answers · asked by RayB49 1 in Earth Sciences & Geology

Oceanography is the study of oceans.

2007-07-18 10:39:35 · 3 answers · asked by RayB49 1 in Earth Sciences & Geology

a) monkeys
b) humans
c) apes
d) humans and apes only.
e) monkeys, humans, and apes.

2007-07-18 10:38:41 · 5 answers · asked by Anonymous in Biology

Graph the following equation; calculate the slope, x-intercept, and y-intercept, and label the intercepts on the graph.
y = x + 3

2007-07-18 10:38:35 · 5 answers · asked by Anonymous in Mathematics

Please add the following polynomial fractions.

(a - 1/a + 1)+(a + 1/ a - 1)=

does it equal a^4??

2007-07-18 10:33:17 · 9 answers · asked by soccermom71968 1 in Mathematics

I have a question that looks like this:
Which of the following is the interval of convergence of the power series:

the summation from n=0 to infinity of:(x-2)^n / 2^n

There are 5 different answers:
a) 2 <= x <2
b) -2 < x <= 2
c) 0 < x < 4
d) 0 <=x < 4
e) -2 <= x <= 2

Are there any tricks to solving these types of calculus problems? Do you know the answer to this one, and if so, how did you do it? I read about this absolute value ratio method, but cannot figure it out. Thanks for your help!

2007-07-18 10:31:48 · 3 answers · asked by Chrystal T 1 in Mathematics

What mass of nitrogen gas must be released into an 18 L automobile air bag if the pressure in the bag is to be 2.0 atm at a temperature of 20°C?

2007-07-18 10:30:26 · 2 answers · asked by justjrry 3 in Chemistry

im trying to print some invitations and this is the size. is it 7.75 lenght and 5.5 width? i just want to make sure.

2007-07-18 10:29:43 · 5 answers · asked by Anonymous in Engineering

2007-07-18 10:29:37 · 3 answers · asked by justjrry 3 in Chemistry

There appear to be two birds feeding the baby birds in our hanging basket on the front porch. I think they are finches---a male and a female. Does the male stay to help the female take care of the babies? We did see both birds build the nest together.

2007-07-18 10:29:02 · 8 answers · asked by haddickta 1 in Zoology

What's the % you give him of winning?

2007-07-18 10:27:55 · 4 answers · asked by colonelfan88 2 in Mathematics

I need to convert

a variety of fractions with exponents, exponents that are fractions, fractions that are a part of fractions, and radicals that are fractions

into radical form and negative exponents.


for example
I already converted 1/2^4 to 2^-4 in negative exponent form.

i hope this makes sense


PLEASE HELP ME ASAP IF YOU CAN

THANK YOU!

2007-07-18 10:26:42 · 3 answers · asked by ♡ 2 in Mathematics

Mg(OH)2 (s) = Mg^2 (aq) + 2 OH^- (aq)

Is this reaction endothermic or exothermic and why

2007-07-18 10:26:02 · 0 answers · asked by D 1 in Chemistry

ok, to me each year it seems liek the weaher channel just gets worse and worse. I liked it when it was 24/7 weather, not stupid programming stuff and put traffic into cuz first of the traffic portion just sucks imo. also i dont liek the new 'black bar' on the bottom .. what happned to the old date and time(h:m:s format) with just the forcasta nd stuff for the closest rgion to you...... now it switched between the time(h:m format) and the temp and has traffic flow, weather id (wtf is that), and other stuff. I used to go to TWC int he morning to check the time, date, and weather real quick .. now its just so differnt i really dont liek it at all. Does anyone else not liek the weather channel format now?

2007-07-18 10:23:54 · 5 answers · asked by GuitarPunk2512 2 in Weather

2007-07-18 10:21:25 · 14 answers · asked by Shanks 4 in Botany

here it is:
http://www.crunchyroll.com/user/babiixjen_x3/photos/1211931

2007-07-18 10:13:49 · 3 answers · asked by blahhhhhh 2 in Mathematics

I have a document from 12/10/1778 from County of Zemplinia, Hungary. It gives reference to Noblemen Terebessy Georgium, Terebessy Francis, Terebessy Stephani, and Terebessy Adam.
The family crest is a four sided tower erected over a tripple hill and a turtle dove pierced with a spear on it, and of a flag protruding from the top granted by the emporer of Ferdinand II, in 1624.
The document also mentions the cities Agard and Nagy.

2007-07-18 10:10:04 · 2 answers · asked by Michael T 1 in Geography

2007-07-18 10:09:37 · 15 answers · asked by Hazel 2 in Astronomy & Space

how do you solve this?

2007-07-18 10:09:06 · 6 answers · asked by Anonymous in Mathematics

2007-07-18 10:07:00 · 6 answers · asked by Denise L 1 in Geography

2007-07-18 10:05:44 · 5 answers · asked by Anonymous in Zoology

ummm jus a strange one init!!

2007-07-18 10:00:58 · 13 answers · asked by Anonymous in Other - Science

sometimes i feel like a flight halting on air when i asked my friends they said its moving slowly which I can hardly trust.so please give me a clear answer thanks

2007-07-18 09:57:56 · 7 answers · asked by Anonymous in Engineering

I know what it is from asking in here , now i'm just wondering how astronomers use it in the astronomy world?

2007-07-18 09:53:16 · 3 answers · asked by Planet22 2 in Astronomy & Space

how do astronauts go to the bathroom in space...

2007-07-18 09:51:46 · 21 answers · asked by princessone 1 in Astronomy & Space