Science & Mathematics - 20 August 2007

2007-08-20 06:46:57 · 11 answers · asked by lovepets 6 in Weather

Every 10 seconds Homer reaches into the bag, retrieves one donut (1/2 lb), and consumes it.

What is the magnitude of the jerk?

http://alexandersemenov.tripod.com/ya/jrk/index.htm



The rope and the block are weightless and frictionless.

2007-08-20 06:45:52 · 3 answers · asked by Alexander 6 in Physics

what is x?

2007-08-20 06:45:09 · 7 answers · asked by lang1323 2 in Mathematics

We were given a Fotar 675 telescope as a gift, it has an instruction book but it might as well be in Chinese for all the sense it makes. I assembled the unit but I don't think I did it properly. Is there a website or a pdf available that goes into indepth instruction and operation?

2007-08-20 06:44:40 · 4 answers · asked by petepsuedo 1 in Astronomy & Space

2007-08-20 06:41:39 · 3 answers · asked by jessie0420 2 in Mathematics

2007-08-20 06:39:15 · 6 answers · asked by Kristin 2 in Weather

2007-08-20 06:36:34 · 3 answers · asked by Anonymous in Engineering

My Question

-What is the difference between a "phase of matter" and a "state of matter"?

Oh and if you could please help with this too:
Are the following Homogeneous or Heterogeneous?
1)14 kt. Gold
2)dishwater

2007-08-20 06:36:10 · 2 answers · asked by Wannabepilot 1 in Other - Science

2007-08-20 06:35:51 · 13 answers · asked by jessie0420 2 in Mathematics

I got Y = 2x-7....
my book says it is wrong, please tell me why

2007-08-20 06:33:03 · 9 answers · asked by Anonymous in Mathematics

in each of the following define the acid base interaction:
H3O+ (aq) + OH- (aq) --> 2H2O (l)

BF3(g) + NH3 (g) --> F3B - NH3 (s)

2007-08-20 06:30:57 · 1 answers · asked by Anonymous in Chemistry

2007-08-20 06:28:22 · 2 answers · asked by Me! 2 in Astronomy & Space

of this line segment
(-3,6) (2,5)

can someone show me how to this step by step

2007-08-20 06:24:15 · 4 answers · asked by Anonymous in Mathematics

The fish is a Sting Ray!

a. Fins


b. Scales


c. Swim bladder

2007-08-20 06:22:25 · 1 answers · asked by Angel 1 in Biology

i know it is 1 1/3 by why (please give great detail)

2007-08-20 06:21:26 · 16 answers · asked by Anonymous in Mathematics

v= -2i - 3j
w= i - j

2007-08-20 06:20:00 · 4 answers · asked by jessie0420 2 in Mathematics

Who propsed the theory that the elements in a compound do not always combine in the same fixed ratio?

Berthollet

Lavoisier

Proust

Dalton

2007-08-20 06:19:25 · 2 answers · asked by Anonymous in Chemistry

How tall is the tree?

2007-08-20 06:14:53 · 8 answers · asked by Boogie 2 in Mathematics

I want this tool to take me to various places in the Universe. I also would be interested in another that would enable one to "travel" "INNER SPACE"...of course I'm a science-fiction fan. Some one help get me
outta here!

2007-08-20 06:14:22 · 3 answers · asked by Phillip M 2 in Astronomy & Space

whats the answer?

2007-08-20 06:13:27 · 8 answers · asked by lang1323 2 in Mathematics

Got a presentation tomorrow, wiki isn't helping. Tried search engines too, no good.
Can anyone find me a link to a good website which explains satellites working principle???
Will be grateful

2007-08-20 06:12:47 · 3 answers · asked by Saman Khan 2 in Astronomy & Space

the speed of light, would we be going back in time?

I don't know if this just sounds like a silly question, but seriously, if you are travelling faster than light.. what do people think will happen?

2007-08-20 06:12:18 · 17 answers · asked by Bubble 2 in Physics

Someone please break this down for me, I cannot understand how to do this. My brain is just not grasping the concept...

P(3,-2) Q(1,4)

P(-2,0) Q (0,3)

P(-3,3) Q(-2,3)

P(3,2) Q(3,-4)

THANK YOU SO MUCH FOR TAKING THE TIME TO LOOK OVER THESE!

2007-08-20 06:11:56 · 6 answers · asked by ♥ ღAngelicaღ♥ 2 in Mathematics

Follow up to a previous question.
http://answers.yahoo.com/question/index;_ylt=ApfILz5IggBhOltT4xreL7Dsy6IX?qid=20070817115919AAUZq7c

A tennis player serves the ball such that
1) the initial speed of the ball is 50 m/s
2) the ball is angled downward at an angle of depression θ from the horizontal
3) the ball is initially served from a height of 2 m above the ground

The net is 1 m high, and is 12 m away from the server. The ball must clear the net and land within 6 m from the net, ie the ball must hit the ground 12-18 m from the server.

It is NOT possible to do this without topspin. How much force of topspin is required to make the ball clear the net (x=12) and land at x=18? And what value of θ is required?

For simplicity consider topspin to result in a constant downward force.

Ignore air resistance, side spin, serving out wide etc. Only use the values given here.
g = 9.81 m/s^2

2007-08-20 06:10:54 · 3 answers · asked by Dr D 7 in Physics

pls help... i'm getting confused already
is e raised to negative infinity equal to 0?

2007-08-20 06:10:26 · 8 answers · asked by Anonymous in Mathematics

2007-08-20 06:10:06 · 7 answers · asked by Anonymous in Other - Science

2007-08-20 06:04:05 · 3 answers · asked by lex 1 in Biology

In Illinois about 56% of the days in a year are cloudy. Find the mean, variance and standard deviation for the number of cloudy days in June. Interpret the results and determine any unusual values.

2007-08-20 06:04:01 · 2 answers · asked by Creepmime 1 in Mathematics

2007-08-20 06:02:19 · 4 answers · asked by goodygood800 1 in Chemistry

2007-08-20 06:01:46 · 13 answers · asked by Anonymous in Geography