Science & Mathematics - 30 July 2007

for entertainment,military........etc,etc.... jot down anything you think of!

2007-07-30 19:35:48 · 3 answers · asked by Aditya 1 in Other - Science

Consider the parametric curve given by the equations

x(t) = t^2 + 23t - 8
y(t) = t^2 + 23t + 33

How many units of distance are covered by the point
P(t) = (x(t), y(t)) between t = 0, and t = 2?

2007-07-30 19:29:41 · 2 answers · asked by Anonymous in Mathematics

i'm a director of films and i'm having trouble finding some good songs if you know any songs or artists please tell me.

2007-07-30 19:26:16 · 5 answers · asked by bigfrmrb 1 in Weather

How many permutations of ABCDEF have A appearing before F?

I know that combinations are used to solve this problem, yet I do not know how.

also,

How many permutations of the letters ABCDEF have A and F separated by at least one letter?

would this be (Total # of Permutations) - (# Permutations with A and F touching each other)?

2007-07-30 19:21:58 · 5 answers · asked by elyse h 1 in Mathematics

I work at a zoo, not as a keeper, but it seems to me that many of the keepers that work here are not very personable...some are downright rude to everyone. Why is that?

2007-07-30 19:19:33 · 4 answers · asked by Anonymous in Zoology

that works but there is no lightbulb meaning that there would be light if there were a lightbulb ... anyways, do you still waste electricity by just having the light switch on?

2007-07-30 19:13:38 · 9 answers · asked by i cant think of a nickname 1 in Engineering

2007-07-30 19:13:27 · 6 answers · asked by Anonymous in Physics

for example you had a cube you wanted to know the distance from one point to the oppsite side (longest length possible , or right thorugh the middle)
e.g. point a is (0,0,0) point b is (6,0,0) point c is (0,6,0) point d is (6,6,0) point e is (0,0,6) point f is (6,0,6) point g is (0,6,6) point h is (6,6,6)

so if i wanted the distance from a to h how would i get it, (0,0,0) to (6,6,6)

2007-07-30 19:11:04 · 7 answers · asked by LazyForLife 2 in Mathematics

Today (July 30th) in Calgary, Alberta we had a blood red moon, it was really facinating, being almost full (full moon was yesterday). Trying to look up this phenomenon, I've discovered the most common cause of such a red moon to be a lunar eclipse. However the last lunar eclipse was in early March and the next isn't due until the end of August.

Since a lunar eclipse is not causing this brilliant red moon, what could it be? This moon is brilliant red at night (10 o'clock-12 o'clock) so it's not the sun shining over the horizon like it does in the early evening/morning.

2007-07-30 19:07:29 · 5 answers · asked by druidoferiu 2 in Weather

How do you know where the curves will cross? For example: The problem "x=2 sin 2t, y=3 sin t" crosses itself at the origin, (0,0). "At this point, t=0 or t=pi." How do you know this?

2007-07-30 18:58:09 · 2 answers · asked by Kayla G 1 in Mathematics

If you isolated 0.57 g of calcium phosphate, calculate the percent phosphate in a 50 g sample of milk.

2007-07-30 18:56:05 · 2 answers · asked by Allie 2 in Chemistry

(-3a²)³(-a³)³(4a)³ divided by (2a³)³ = ??? and why plz
ty

2007-07-30 18:49:20 · 6 answers · asked by π_man 2 in Mathematics

process

2007-07-30 18:34:07 · 1 answers · asked by poonam 1 in Chemistry

Why do you think people believe in evolution? Choose one of the following:
a) Evolutionists just want to oppose religion. That's all. They'll try to find any reason to disprove Creationism, just for the sake of opposing religion.
b) Evolutionists truly believe that evolution is the way to go. They are not purposefully trying to opposing religion. They simply rely on what they observe -- whether that contradicts or supports religion, they don't care.

I ask this because some people seem to think there is a "conspiracy" going on, with evolutionists deliberately trying to fight religion. To those people I ask: what motive do we have in opposing religion? How would that benefit us? Heck, we'd be all thrilled if Creationism was really true -- it's not very flattering to know that your great great great ... grandfather wasn't human. What do we gain from opposing creationism? Money? nope. Fame? nope.

2007-07-30 18:31:08 · 10 answers · asked by Anonymous in Biology

Imagine that I have an AC to DC (220V AC to 18.5V DC) Adapter for an electronic appliance and if the AC side is connected to the power socket and if the DC side of the adapter is not connected to the appliance will there be a significant voltage drop across the transformer & resistors of the Rectifier Circuit?? If I have the habit of doing this daily will it reflect in my Electricity Bill??

Thanks in Advance.

2007-07-30 18:29:29 · 4 answers · asked by eric_john 3 in Engineering

Show there's no function f:R --> R such that the composite h = f o f is given by h(x) = x^2 - 1996. This problem is considered difficult. I don't know how to do this.

2007-07-30 18:28:53 · 4 answers · asked by Sandra 1 in Mathematics

solve for x : (2^(x+2))/ 16 = (4^(x-1))/ (2^(2x+1).

2007-07-30 18:20:42 · 4 answers · asked by Allison 1 in Mathematics

The following induction "justification" that all sheep in a flock are the same color is wrong. I have to state what makes it wrong.

Base case:
One sheep, It is clearly the same color as itself

Induction step:
A flock of n sheep. Take a sheep, a, out of the flock. The remaning n-1 are all the same color by induction. Now put sheep a back in the flock, and take out a different sheep, b. By induction, the n-1 sheep are all the same color. Therefore, a is the same color as all the other sheep; hence all the sheep in the flock are the same color.

I have two ideas which i am working with

The base case states that only one sheep by itself is the same color. I can take a group of sheep and separate them. They can be all the different color, but by the base case they are considered the same.

In the induction step there is no comparison amoung the sheep. In order to tell if they are the same there should be a comparsion between them.

Still thinking about it. Any ideas?

2007-07-30 18:19:23 · 1 answers · asked by Loric M 2 in Mathematics

The probability density function of X, the lifetime of a certain type of device (measured in months), is given by

f(x) = 0 if x < 22
f(x) = 22/ x^2 if x > 22

P(X > 45) = 22/45

The cumulative distribution function of X:
F(x) = 0 if x < 22
F(x) = ? if x > 22

(1 is not the correct answer).

2007-07-30 18:19:02 · 1 answers · asked by Anonymous in Mathematics

the earth is spinnig and oceans with high tides and covering about 85 percent of earth is not flowing in the space. if it is gravity can you explain a bit more

2007-07-30 18:17:45 · 10 answers · asked by abdullakoona 1 in Earth Sciences & Geology

Find the equation y = ax^2 +bx +c whose graph contains the points (1, -1) (3, -1) (-2, 14)

you have to solve using the system of linear equation stuff, so I did:

-1 = a(1)^2 + b(1) +c
-1 = a(3)^2 + b(3) +c
14 = a(-2)^2 + b(-2) +c

and got the system:
a+b+c = -1
9a+3b+c = -1
4a-2b+c = 14

so I went through and solved:
first with lines 1 and 2:
-9a-9b-9c = 9
9a +3b+c=-1 and got -6b-8c=8 . . . plugged back into system

a+b+c = -1
-6b-8c=8
4a-2b+c = 14 then took lines 1 and 3 did the same:

-4a-4b-4c = 4
4a-2b+c=14 and got -6b-3c=18 plugged back into system:

a+b+c = -1
-6b-8c=8
-6b-3c=18 then took lines 2 and 3 did the same:

and got c = -3, pluged that back into a different equation and got b = 13/3 and plugged both into first equation and got a = -1/3

now did I do this correctly???

please let me know!! thanks!!

2007-07-30 18:16:55 · 2 answers · asked by Anonymous in Mathematics

2007-07-30 18:14:20 · 2 answers · asked by cmgal 1 in Engineering

As a teacher, I used a great online flash/shockwave activity to help children count the distance of a storm with lightning/thunder but I've lost the link... Maybe someone has the link?

2007-07-30 18:10:44 · 2 answers · asked by Anonymous in Weather

2007-07-30 18:08:01 · 2 answers · asked by Lefty 2 in Astronomy & Space

If not, then who does? And what are some fetal surgical procedures?

2007-07-30 18:05:05 · 3 answers · asked by Anonymous in Medicine

how they manage their monthly periods? are they on any harmonal tablets to curtail period for the duration of their trip in space?

2007-07-30 17:55:59 · 3 answers · asked by whatsinaname 2 in Astronomy & Space

prove that | x - y | is greater than or equal to | x | - | y |.

2007-07-30 17:49:55 · 2 answers · asked by Allison 1 in Mathematics

Many people have been basing judgments on the fact that nothing can be disproven unless you have evidence saying thats its impossible under all circumstances. Although some things may be backed with this, i dont think that this theory should be used commonly.

2007-07-30 17:49:44 · 5 answers · asked by Anonymous in Other - Science

2007-07-30 17:46:13 · 5 answers · asked by MDuck06 2 in Other - Science

Ok my bottle says to take ativan twice daily. I usually wake up at 9am and go bed at 1am. What times should I be taking my doses?

Lately I take one when I wake up, and then I take another one around Noon. I think that is wrong because I get reallly Tired at 5pm or so.

On top of this, I take 1 pill of zolof a day, when is the best time to take that too?

2007-07-30 17:34:18 · 6 answers · asked by Anonymous in Medicine