Science & Mathematics - 17 September 2007

Solve the formula for the given letter. Assume all variables represent non-negative numbers. E=nc^2, for c.


The width of a rectangle is 5 ft less than the length. The area is 6ft squared. Find the length and the width.


Astudent opens a mathematics book to two facing pages. The product of the page number is 2352. Find the page numbers.


Determine the nature of the solutions of the equation. x^2+16=0.


Solve by completing the square. x^2+(3/2)x=3

2007-09-17 03:06:03 · 4 answers · asked by Anonymous in Mathematics

This morning I observed a very bright star in the horizon about 20 degrees. It was very bright, very full, and very low in the sky.

2007-09-17 03:05:40 · 10 answers · asked by alan d 1 in Astronomy & Space

2007-09-17 03:05:29 · 9 answers · asked by JOHN P 1 in Engineering

2007-09-17 03:04:27 · 4 answers · asked by mariansweetheart 1 in Chemistry

Determine the volume of the solid generated by revolving the region enclosed by the circle x^2 + y^2 = 1 about the line x = -2.The solid resembles a doughnut.

Post solutions, please. :)

2007-09-17 03:03:34 · 7 answers · asked by Anonymous in Mathematics

2007-09-17 03:01:38 · 6 answers · asked by meghamala86 1 in Chemistry

what is the effect of red tide in our food supply

2007-09-17 02:59:57 · 9 answers · asked by rolly_gai63 g 1 in Earth Sciences & Geology

Could somebody please prove this statement?


Σ n² where n=0 to N-1 = 1/6*[N(N-1)(2N-1)]

Thanks

2007-09-17 02:57:39 · 2 answers · asked by rmtzlr 2 in Mathematics

The strong monsoon winds caused a coconut tree 30m high to tilt at an angle of 80*[with respect to the ground ].A support wire 24m long is to be fixed at a point 5m from the top of the tree,so that the coconut tree becomes perpendicular to the ground.How far from the base of the coconut tree should the wire be fixed to the ground.

2007-09-17 02:55:59 · 3 answers · asked by g g 2 in Mathematics

2007-09-17 02:55:50 · 4 answers · asked by Anonymous in Chemistry

2007-09-17 02:54:59 · 2 answers · asked by Anonymous in Chemistry

this is the formula.. help me please?>? please?? please?

C5H10O

2007-09-17 02:53:03 · 4 answers · asked by Marie C 2 in Chemistry

have mine in backyard up stream would like to no if any value in stream found quartz so far can not tell 1 rock from nother would like history and pictures what to look for how do i do that need help

2007-09-17 02:51:26 · 3 answers · asked by brian l 1 in Earth Sciences & Geology

I live in the eastern us, near the woods. My grandmother does too. Around her yard, she has tons of squirrels. There's a strange one though. He's been there around two years. It has a body like a squirrel, but a tail like a raccoon. Also, it's face is raccoon-like, but small like a squirrel. What is it??? It gathers nuts, and LOVES bagels.

2007-09-17 02:50:35 · 2 answers · asked by theARTSlover003 3 in Zoology

laboratory report determination of sorbic acid in food that are store in the can

2007-09-17 02:49:37 · 2 answers · asked by Anonymous in Chemistry

Two crewmen pull a boat through a lock. One crewman pulls with a force of F1 = 105 N at an angle of = 33° relative to the forward direction of the raft. The second crewman, on the opposite side of the lock, pulls at an angle of 45°. With what force F2 should the second crewman pull so that the net force of the two crewmen is in the forward direction?

2007-09-17 02:45:33 · 2 answers · asked by Anonymous in Physics

I have to do a breif presentation over Heisenberg's uncertainty principle, and unfortunatley it is way to complicated for me to understand. She gave us 2 days to research it and i dont know what im doing. What i would like from you guys, if you would be so kind, is a simple explanation, in your own words, so no plaguerizing is going on, as to what his uncertainty princple says. Also, a link to a webpage with a proof of his theory, and some of the problems with his theory. If any of you could provide me with any or all of these answer it would be so awesome!

2007-09-17 02:45:22 · 5 answers · asked by buckeyefan1191 3 in Physics

I have to prove the following by method of contradiction:

Let p and q be positive integers with p a) Prove that q-p divides p-1 if and only if q-p divides q-1.
b) Let d be a common divisor of p-1 and q-1. Prove that d divides q-p.

I understand the concept behind proving if, then statements by contradiction (assume the "if..." and also assume the not "then..." then reach a contradiction) but I'm confused as to how to do it for an if and only if problem.

2007-09-17 02:44:58 · 6 answers · asked by lilygnome 2 in Mathematics

A professor gave a speech to an assembly of colleagues. After five minutes, half of the audience left; 10 minutes later a third of the remaining audience left. After 20 more minutes, half of the remaining audience left, leaving only 3 people in the audience. How many people were in the audience at the beginning of the speech?

2007-09-17 02:39:18 · 13 answers · asked by Barbie 1 in Mathematics

I look at Court TV and see the three psychics trying to find clues for people who are already dead and I still haven't seen a show where they helped solve a crime. Why don't they use their psychic abilities to find this girl. Then there is Sylvia Brown on Montel Williams, the psychic's on the Psychic Detective and Psychic Investigations on Court TV and A&E or Biology. Why don't they all ban together to find this child in case she is still alive. I see these nationally known child missing cases and wish I had psychic power to help find these kids. Is there any True Psychic out there who reads this that may know what happened to her. Please help if you can!!!!!

2007-09-17 02:37:48 · 11 answers · asked by Connie 2 in Paranormal Phenomena

Ana can fix a house in 2 days,Annie can fix a house in 4 days while Anton can fix it in 6 days. How long will it take for them 3 to build a house?

2007-09-17 02:31:01 · 7 answers · asked by hannah 4 in Mathematics

if a rigid body is rotated about a fixed axis , prove that the curl of the linear velocity 'v' of a point on the body is equal to twice the angular velocity...

2007-09-17 02:23:15 · 1 answers · asked by goerge 1 in Physics

I do NOT understand this stuff!!

I can draw out the conversion tables, but it's figuring out WHAT to START with that I'm having a problem with.

For example:
A serum BUN reactivity was very high and required a dilution to complete the assay. If 100 microliters of serum was added to 0.5mL of dilutent but this was not adequate, so 200 microliters of the prior solution was added to 0.2mL of dilutent for the final assay. What is the dilution ratio of each dilution and the final dilution ratio?

Ugh...if I could just understand the language of what they are asking, I could figure this out. What are they asking me to do?

2007-09-17 02:22:15 · 1 answers · asked by I_color_outside_the_lines 4 in Medicine

2007-09-17 02:20:04 · 7 answers · asked by Anonymous in Physics

Tony will paint 16 right, cylindrical columns. The top face and the bottom face will be covered, so those parts will not be painted. Each column is 18 feet tall and has a diameter of 10 feet. One gallon of paint will cover 350 square feet. If paint is sold only in full gallons, how many gallons of paint must Tony buy to paint all 16 columns?

2007-09-17 02:16:07 · 7 answers · asked by Barbie 1 in Mathematics

wHY DOES IT YEILD THIS KIND OF RESULT?

2007-09-17 02:15:21 · 1 answers · asked by mom@oneeight 1 in Chemistry

2007-09-17 02:14:18 · 8 answers · asked by lumar t 1 in Astronomy & Space

2007-09-17 02:11:16 · 8 answers · asked by Anonymous in Physics

2007-09-17 02:10:34 · 9 answers · asked by lumar t 1 in Astronomy & Space

What is the volume of a right, rectangular prism with side, front and bottom faces having area 15 square inches, 10 square inches and 6 square inches, respectively?

2007-09-17 02:09:32 · 2 answers · asked by Barbie 1 in Mathematics