Science & Mathematics - 23 October 2007

2007-10-23 10:28:33 · 5 answers · asked by Anonymous in Mathematics

Calculus Maximization problem Please help!?
a) A rectangular parking is to be fenced on three sides leaving the fourth side open to the street. If there is 800 meters of fencing available, determine the dimensions that would produce the maximum area.
How would you create the derivatives.

2007-10-23 10:28:20 · 2 answers · asked by Anonymous in Mathematics

2007-10-23 10:24:36 · 12 answers · asked by ;) 3 in Mathematics

2007-10-23 10:23:30 · 1 answers · asked by anonamous 2 in Geography

An object is 1 micron in size and is observed using a light microscope with a 10x eyepiece and a 100x objective. What is the apparent size of the object?

2007-10-23 10:21:58 · 1 answers · asked by Abdul-Rehman H 1 in Biology

2007-10-23 10:21:35 · 1 answers · asked by Anonymous in Biology

2007-10-23 10:20:56 · 10 answers · asked by Anonymous in Mathematics

Ok so there is two types of special angles were working with the 30-60-90 Triangle and 45-45-90 triangle so my question is and were at the origin .So if i got 30 degrees how would i know how to find the value of x and y coordinates (is there anyway or will i have to remember the chart ?) like i see in my book that for a 45 degree angle the x= sq.rt of 2 and y= sq.rt of 2 will i have to remember these mentally or is there some way to calculate to get x and y from 45 degrees?

2007-10-23 10:20:49 · 2 answers · asked by Zoology 1 in Mathematics

The key way is worn on my motor and a the standard 1/4" key will no longer hold the load without play.

What is the best way to cut a new keyway on a motor?

2007-10-23 10:19:55 · 1 answers · asked by That Guy 4 in Engineering

This one sheep on the news wasn't sheered for 3 years and couldn't walk because of it's excess wool. I was wondering what sheep did before people came along to cut their wool for them. Weird question i know....

2007-10-23 10:18:36 · 14 answers · asked by aznvegan 1 in Zoology

ok here is the problem:

[0 -6] _ [5 2] _ [2 -26] = [3 25]
[1 2] [4 3]X [3 -18] [2 24]


The capital X is the matrix that I need solved. The parenthesis about each other represents a 2x2 matrix. Sorry this is the best I could put it and it moves the bottom row over.

2007-10-23 10:17:47 · 1 answers · asked by lakewoodskater308 1 in Mathematics

when 0=0 does it mean no solution,undefined, or many solutions?

2007-10-23 10:17:36 · 2 answers · asked by Anonymous in Mathematics

im doing a science project and i need ideas for how to keep my egg from cracking when i drop it from the top of the football bleachers. any ideas as to what to do?

i can use any materials except glass and metal. and you cant coat the egg with anything.

2007-10-23 10:16:17 · 1 answers · asked by moose 1 in Physics

plz give me this answer of this math

2007-10-23 10:15:05 · 2 answers · asked by Anonymous in Engineering

2007-10-23 10:15:05 · 1 answers · asked by Anonymous in Geography

1.A freight train has a mass of 2 107 kg. If the locomotive can exert a constant pull of 9 105 N, how long would it take to increase the speed of the train from rest to 85 km/h?
s


2.A 50 kg person escapes from a burning building by jumping from a window 50 m above a catching net. Assuming that air resistance exerts a 95 N force on the person during the fall, determine the person's velocity just before hitting the net.
m/s

2007-10-23 10:11:13 · 2 answers · asked by Anonymous in Physics

A single bead can slide with negligible friction on a wire that is bent into a circular loop of radius 15 cm. The circle is always in a verticle plane and rotates steadily about its vertical diameter. The position of the bead is described by the angle θ that the radial line, from the center of the loop to the bead, makes with the vertical. (the circle is rotating to the right)
If if the period of the rotation is .450 s, at what angle(s) up from the bottom of the circle can the bead stay motionless relative to the turning circle? (b) Repeat the problem taking the period of the circle's rotation as 0/850 s.

2007-10-23 10:10:43 · 2 answers · asked by klevix 2 in Physics

I need 0.5mol/L of the following HCl (lemon juice), NaOH(Drain Clearner), Acetic acid(vinegar) and sodium bicarbonate(baking soda). The problem is I don't know what the concentration of HCl is in lemon juice. Same thing for the other three items. How would I do this?

2007-10-23 10:10:43 · 2 answers · asked by llllllllllllll 2 in Chemistry

2007-10-23 10:08:49 · 6 answers · asked by Andres A 1 in Mathematics

i want to do an easy eassy

2007-10-23 10:08:38 · 29 answers · asked by Na-Jaya J 1 in Astronomy & Space

Basically, like the title said "...sulphuric acid clouds causing the world temperature to plummet by blocking out sunlight/heat" We've just been having a debate about it on IRC and half of us think it will, where as the other half think it will not. Thanks for your answers.

2007-10-23 10:07:56 · 3 answers · asked by Charlie N 2 in Earth Sciences & Geology

I found a website that said that Ca(OH)2 is completely ionized but not soluble in water... how does that work? If it's not soluble then how is it a strong base?

2007-10-23 10:07:53 · 1 answers · asked by AC 1 in Chemistry

i'm watching the news about the california wildfires and i know they happend so often are these fires intentional?

2007-10-23 10:04:25 · 20 answers · asked by ynra BTB 4-18-09 6 in Weather

Is there a name for the region just below the congo and north of the Kalihari? What is it?

2007-10-23 10:03:00 · 4 answers · asked by Cody C 3 in Geography

how to convert my scores into GPA .. 87,27% into GPA ???help please

2007-10-23 10:00:34 · 3 answers · asked by jewel 3 in Mathematics

2007-10-23 09:52:56 · 4 answers · asked by Class of '09 3 in Astronomy & Space

2007-10-23 09:52:43 · 12 answers · asked by bob 1 in Mathematics

I have heard that there are pockets of material following the earth in its orbit at 120 degrees and 240 degrees, and following Jupiter in its orbit at even intervals unaffected by resonant gravitational pulls of neighboring satillites. What is known of these areas of space? How much material is there? Wouldn't it be fairly economical to send an unmanned probe there?

2007-10-23 09:51:37 · 1 answers · asked by Commadore Tommy Gun 3 in Astronomy & Space

Im not sure but i think my grand pop is wathing me as the yellow butterfly i see this butterfly every so often and it is only my family that notices this butterfly ....
could this be my grandpa ...
and if you are physicic can you tell me his nick name that way i know for sure you are not lying..
thanks..

2007-10-23 09:50:25 · 10 answers · asked by taylorheartscolexoxo 2 in Paranormal Phenomena

How is acceleration a function of Force and Mass??




Thanks for the help!!!

2007-10-23 09:49:24 · 5 answers · asked by Anonymous in Physics