Science & Mathematics - 31 October 2007

2007-10-31 14:39:11 · 4 answers · asked by csp115 1 in Engineering

I think they should include symbols like

- plus or minus
- square root
- inequality signs
- pi

... etc.

I think it would make things a lot clearer... they could possibly set up a code so that you would need to type something like

$sqrt$

or something like that. What do you guys think?

2007-10-31 14:38:07 · 6 answers · asked by de4th 4 in Mathematics

I need a news article that relates to mineral or energy resources.

Any news article...

2007-10-31 14:38:03 · 1 answers · asked by Anonymous in Earth Sciences & Geology

That was so fake! You don't have to go thru all that to do it.
What did you think? A little too dramatic??? lol

2007-10-31 14:34:40 · 6 answers · asked by Deenie 6 in Paranormal Phenomena

F (x) = -4 x ^10 ?

2007-10-31 14:30:23 · 2 answers · asked by Josianne 3 in Mathematics

what would be the best a.c voltage insulation to stop arcing between two points of about 4mm,the insultors need to be in tubeular form of about 6mm inside diameter and about 14 mm out side diameter

2007-10-31 14:30:19 · 8 answers · asked by tugboat 4 in Engineering

It looks like an ant - brown with no markings that we can see.

2007-10-31 14:28:13 · 6 answers · asked by mamaP 2 in Zoology

I've always wondered what the tornado chasers took when they were in college to get where they are now. Is it something you can make into a career? If so, what degree do you go into?

2007-10-31 14:27:15 · 7 answers · asked by Jen 5 in Weather

The bag is tied to a thwart and suspended in the water underneath the canoe. The canoe:

(a) floats deeper in the water
(b) floats higher in the water
(c) floats at the same level (draft)
(d) sinks

This is an actual exam question from a course on ship structure and stability. Anyone want to take a shot at it?

A little more info: a thwart is a cross-beam, which in a canoe would be used as a seat. Also, I think the "net bag" suggests that water will penetrate the bag, so there won't be any buoyancy contributed from the bag itself.

2007-10-31 14:22:27 · 6 answers · asked by Stephen S 1 in Physics

substanstial food supply for all of us as well as the animal kingdom? This is excluding any natural diasters and the possibility of a panademic or some space debris hitting us. Does this rattle your cage? Whats the chance of something like this happening within the next 50 yrs? I predict it will happen b4 then not to mention some nut who wants to send a few big bombs into us wiping out life as we know it.This is not ask to scare people but is ask to make people realize how vunderable we really are ..We really have control over very little do we?

2007-10-31 14:19:01 · 6 answers · asked by Anonymous in Astronomy & Space

2007-10-31 14:17:33 · 9 answers · asked by Anonymous in Parapsychology

If you could, theoretically suspend a particle of matter at the point it would be an instant before entering the singularity of a black hole, what would its gravitational potential energy be?

2007-10-31 14:14:39 · 1 answers · asked by Outlawed Spirit 2 in Physics

2007-10-31 14:13:30 · 1 answers · asked by Anonymous in Physics

a 873kg dragster, starting from rest, attains a speed of 26.3 m/s in .59s

A.) find the avergae acceleration of the dragster during this time interval
B.) what is the magnitude of the average net force on the dragster during this time?
C.) assume that the driver has a mass of 68 kg. what horizontal force does the seat exert on the driver?

2007-10-31 14:13:16 · 2 answers · asked by kiwi 1 in Physics

A person is making homemade ice cream. She exerts a force of magnitude 17 N on the free end of the crank handle, and this end moves in a circular path of radius 0.33 m. The force is always applied parallel to the motion of the handle. If the handle is turned once every 1.8 s, what is the average power being expended?

i attempted this already and it said i was wrong. my teacher hasn't taught us power yet but i guess because im in ap, he thinks we can do web assign by ourselves untaught. this is due tonight. please help me. i really have tried and came here as a last resort. i tried to do it by my self and found i really do just need help. please, explain how to do this

thank you so very much!!!!

2007-10-31 14:12:29 · 1 answers · asked by Elizabeth 3 in Physics

The mass of a simple pendulum of length, L = 1.0 m is released with the string originially in a horizontal position.. (a) Calculate the speed of the mass at its lowest position. (b) what is the speed when the string makes an angle of 45 degrees with the vertical? (c) Determine the tension in the string in both poistions if the mass is .2 kg

andddd

A machine gun in automatic moe fires 20-g bullets with v(bullet) = 300 m/s at 60 bullets/s. (a) if the bullets enter a thick wooden wall, whts is the average force exerted against the wall? (b) if the bullets hit a steel walland rebound elastically, what is the average force on the wall?

2007-10-31 14:08:23 · 1 answers · asked by Anonymous in Physics

wind currents?

2007-10-31 14:07:10 · 5 answers · asked by jeevus 1 in Weather

2007-10-31 14:06:10 · 6 answers · asked by Anonymous in Mathematics

hole of area is 1.1^2 at a depth of 1m below the water surface

2007-10-31 14:03:55 · 1 answers · asked by Anonymous in Physics

a shoe store sells about 200 pairs of a new basketball shoe each month when it charges $60 per pair.For each $1 increase in price, about 2 fewer pairs per month are sold.

How much per pair should the store charge to maximize monthly revenue?
You: what is the maxium revenue?

the answers are $80; $12800.
The point is I don't know how to get the answers!
please give me explanation not just the answer! thank you!

2007-10-31 14:01:16 · 7 answers · asked by Laivwudbbetorw/omwuah 1 in Mathematics

I don't mean the kind with churches...but doesn't it have a set of beliefs all its own?

2007-10-31 14:01:15 · 6 answers · asked by Deenie 6 in Other - Alternative

I just want to know it's boiling point.
Thank you.

2007-10-31 13:56:38 · 2 answers · asked by deus 2 in Chemistry

I would like it if anyone could tell me it is a silicate or a nonsilicate. Thanks for those who gives me the correct answers.

2007-10-31 13:56:01 · 1 answers · asked by Chaos4ever5135 2 in Earth Sciences & Geology

some people tell me, somewhere within the next 5 years there's going to be a big earthquake that will cause disaster in california and if not, the san andreas fault line (thats been overdue for some time) will split and sink hawaii, thus. creating waves of tsumani heading towards the state of california, and drowing many of us. does anyone know these for a fact or heard about it?

2007-10-31 13:55:36 · 5 answers · asked by Venus_Infers543 1 in Earth Sciences & Geology

2007-10-31 13:55:14 · 7 answers · asked by Ashley B 1 in Mathematics

A tank contains 100L of pure water. Brine that contains .1 kg of salt per liter enters the tank at a rate of 10L/min. The solution is kept thoroughly mixed and drains form the tank at the same rate. How much salt is in the tank after 6 minutes?

2007-10-31 13:55:12 · 1 answers · asked by Q 1 in Mathematics

Force 1 = 45 pounds
Force 2 = 60 pounds
Resultant force = 90 pounds

(hint: write force 1 as a vector in the direction of the positive x-axis and force 2 as a vector at an angle theta with the positive x-axis) <--(what the book suggested...)

2007-10-31 13:54:32 · 3 answers · asked by Andrew T 2 in Mathematics

Hi i was talking to my friend, and she mentioned how earth's magnetic field is bound to end every certain amount of years. the same way they belived dinosaurs became extinct, does anyone know if this is true? that our magnetic field that saves us from the debri that bombards earth is going to shut off anytime soon?

2007-10-31 13:53:39 · 4 answers · asked by Venus_Infers543 1 in Astronomy & Space

If solid CH3COOK, potassium acetate, is dissolved in water, will the resulting solution be acidic, basic, or neutral? Why?

2007-10-31 13:53:08 · 1 answers · asked by anners 1 in Chemistry

So how do I work this?

(1 to 2)(y to y^3) e^(x/y) dx dy

the 1 to 2 is the vetical squigly line for integral.

any help would be appreciated, thanks

2007-10-31 13:51:00 · 3 answers · asked by nick 4 in Mathematics