English Deutsch Français Italiano Español Português 繁體中文 Bahasa Indonesia Tiếng Việt ภาษาไทย
All categories

Science & Mathematics - 9 October 2007

[Selected]: All categories Science & Mathematics

Agriculture · Alternative · Astronomy & Space · Biology · Botany · Chemistry · Earth Sciences & Geology · Engineering · Geography · Mathematics · Medicine · Other - Science · Physics · Weather · Zoology

What products can be produced from recycled copper and copper alloys??

2007-10-09 06:32:26 · 3 answers · asked by conman255 3 in Engineering

Life is everywhere in this planet and everyday mother nature prove scientist wrong all the time so why cant people believe in aliens in the name of God or science

2007-10-09 06:31:53 · 12 answers · asked by SCANDOFONZnyc 2 in Astronomy & Space

f(X)= 64/x @(2,32)

2007-10-09 06:29:30 · 4 answers · asked by needalittlehelp 1 in Mathematics

do you think that if you were on another planet, that you would be able to pick up the satellites signals?

2007-10-09 06:26:32 · 7 answers · asked by Lisa T 6 in Astronomy & Space

2y - 8 + -.5(3 - 5y)

please help with this problem i have no clue what to do ...

2007-10-09 06:25:30 · 12 answers · asked by just me... 1 in Mathematics

what's the difference?

2007-10-09 06:24:19 · 7 answers · asked by Anonymous in Astronomy & Space

2007-10-09 06:19:20 · 4 answers · asked by Angel W 1 in Mathematics

High resistance in both directions
Low resistance in both directions
Low resistance in one direction
None of the above

2007-10-09 06:17:54 · 4 answers · asked by jennifer l 1 in Engineering

High resistance in both directions
Low resistance in both directions
Low resistance in one direction
None of the above

2007-10-09 06:15:59 · 1 answers · asked by jennifer l 1 in Engineering

Two objects, one moving north, one moving east, collide and stick together. If the eastbound object has three times the mass of and is initially moving half as fast as the northbound object, which of the indicated paths represents the most likely final motion of the pair? Justify your answer using the concept of linear momentum.

2007-10-09 06:15:21 · 2 answers · asked by bballchamp023 1 in Physics

2007-10-09 06:11:28 · 12 answers · asked by max b 1 in Physics

A cart slides down a frictionless inclined track to a circular loop of radius R = 13 m. In order for the cart to negotiate the loop safely, the normal force acting on the cart at the top of the loop, due to the track, must be at least equal to the cart's weight. (Note: This is different from the conditions needed to just negotiate the loop.)

a) What must be the minimum speed |vmin| of the cart at the top of the loop?

b) How high h above the top of the loop must the cart be released?

c) When the car is descending vertically in the loop (point (c) in the picture), what is its speed |v|?

d) At the bottom of the loop, on the flat part of the track, the cart must be stopped in a distance of d = 20 m. What retarding acceleration |a| is required?

2007-10-09 06:10:24 · 3 answers · asked by Anonymous in Physics

Two astronauts are each in a circular orbit around an unknown planet. Astronaut "A" is displaced 100 meters "vertically" from Astronaut "B" (that is, the two astronauts are 100 meters apart, on a line that intersects the planet's center).

How far apart will the astronauts be from one another, after they have completed one orbit?

(Surprisingly, the answer does not depend on the planet's mass or on the radius of the orbit. You may assume, however, that the radius of the orbit is much, much greater than 100 meters (and use any resulting mathematical approximations).)

2007-10-09 06:09:02 · 1 answers · asked by RickB 7 in Physics

A motorcycle and rider have a combined mass of 250 kg and are traveling at a steady velocity of 17 m/sec. The force of wind resistance acting the motorcycle and rider at this speed is 150N.

a) What power must the motorcycle produce to sustain this velocity on level ground?


b) How power must the motorcycle produce to sustain this velocity on an upward incline of 39 degrees?


c) How much energy is produced by the motorcycle in 3 hours of driving on level ground?

2007-10-09 06:08:36 · 1 answers · asked by Anonymous in Physics

2007-10-09 06:07:43 · 1 answers · asked by MeMyself&I 1 in Physics

How do you approach and solve this question? Thanks!

the probablity that a machine produces a defective item is 0.01. each item is checked as it is produced. assume that these are independant trials and compute the probablility that atleast 100 items must be checked to find one that is defective.

2007-10-09 06:07:18 · 6 answers · asked by Dr H 2 in Mathematics

2007-10-09 06:07:02 · 5 answers · asked by Anonymous in Chemistry

A. mechanical bender. B. heater box. C. hydraulic bender. D.hand bender.

2007-10-09 06:04:48 · 8 answers · asked by Anonymous in Engineering

I did few basic experiments with NI ELVIS in my school.
And I realized I missed something. It's about DMM.

What if I set the range of resistance less than actual resistance.
ex. If I set the range of resistance as 30k ohm
and the resistor is 300k ohm, what would I see in the screen?

2007-10-09 06:04:24 · 2 answers · asked by Heungson L 1 in Engineering

2007-10-09 06:00:38 · 10 answers · asked by mona S 1 in Mathematics

Is the North/South a good way of separating developed countries fro m developing countries or in other words rich countries from poor countries? Explain why you think this ?

2007-10-09 05:59:04 · 4 answers · asked by Anonymous in Geography

What are the advantages of using fruit based organic fertilizers?

2007-10-09 05:53:55 · 5 answers · asked by kevkevkev 2 in Agriculture

can someone tell me importance use and purpose of organosilicons in chemistry

2007-10-09 05:52:18 · 1 answers · asked by sweety s 1 in Chemistry

Science fair project. I have 3 cups of water..how can i get a method of telli which is cleaner??.

2007-10-09 05:46:23 · 2 answers · asked by Anonymous in Other - Science

Living near the country, i'm used to deer being about and running away as soon as they are approuched, but i'm just wondering whether they're actually agressive as i've never really heard any deer-attacking stories!
My boyfriend is petrified of them, by the way. :D

2007-10-09 05:45:58 · 19 answers · asked by Anonymous in Zoology

I have a few trig questions I'm just not sure and/or don't understand.

1) tan θ =.5890 in Q1
2) 390°= ?? what in rad.
b) reference angle = ??what in deg.
c) reference angle= ?? what in rad.
3) 4 cos (-π/4)
4)sin 3x if x=π/6

I have these answered but I'm not sure if I have them right. PLEASE HELP!! thanks.

2007-10-09 05:43:07 · 2 answers · asked by Kitty 1 in Mathematics

fedest.com, questions and answers