Science & Mathematics - 12 November 2007

in the pictures you are able to see the earth but the stars are nowhere to be seen when photos where taken from the moon.

2007-11-12 12:54:06 · 15 answers · asked by Anonymous in Astronomy & Space

A large football game field has an area of 400 square feet. A small practice field is made with every linear dimension half as large as the game field's dimensions. What is the area of the small practice field?

2007-11-12 12:52:05 · 12 answers · asked by GF 1 in Mathematics

2007-11-12 12:50:44 · 3 answers · asked by Anonymous in Biology

This is about the process of Digestion. So I have an excellent question is what can you infer about the diet of an animal that has a large appendix?

2007-11-12 12:50:05 · 5 answers · asked by Gamundi 08 1 in Biology

Does there exist a 2 x 2 matrix A such that ran(A) = ker(A)? if so find A.

2007-11-12 12:48:41 · 1 answers · asked by Anonymous in Mathematics

You are to design a rotating cylindrical axle to lift 800-N buckets of cement from the ground to a rooftop 78.0 m above the ground. The buckets will be attached to a hook on the free end of a cable that wraps around the rim of the axle; as the axle turns, the buckets will rise.

A) What should the diameter of the axle be in order to raise the buckets at a steady 2.00 cm/s when it is turning at 7.5 rpm?

B) If instead the axle must give the buckets an upward acceleration of , what should the angular acceleration of the axle be?

I need some help with this question. What equations do I need to use? Thanks in advance for the help!

2007-11-12 12:47:25 · 1 answers · asked by nglennie_06 1 in Physics

2007-11-12 12:46:35 · 4 answers · asked by Emerson 5 in Chemistry

2) What do you think are the similarities between Earth and a spaceship as it relates to the life of them?

3)What do you think are the basic needs of living things?

2007-11-12 12:45:16 · 7 answers · asked by Anonymous in Astronomy & Space

yOU ARE MANUFACTORING AND SELLING TWIDGETS AT A PRICE OF $16 EACH, and at that price we have been selling 200 twidgets per month. With each increase in price of $1 will cause 50 fewer twidgets to be sold. You have a variable cost of $900 per month, and a fixed cost of $8 per twidget.

Find the Revenue Function,
Total Cost Fucntion,
and
Profit Function.


CAN ANYONE HELP ME PLEASEEE?

2007-11-12 12:45:11 · 1 answers · asked by Sexymami 1 in Mathematics

If the percent yield of the above reaction is found to be 90.02 %, how many grams of H2O are produced from the complete reaction of 71.85 g of LiOH ?

2007-11-12 12:45:01 · 2 answers · asked by chemical.garry 1 in Chemistry

A)Write a correctly balanced equation for this reaction:

B) Determine the theoretical Yield of ethyl alcohol if 4.6 grams of ethylene is used?

C) What is the Percent yeild of this reaction if 4.6g of ethlene gives 4.7g of ethyl alcohol.

2007-11-12 12:39:35 · 1 answers · asked by Mzbee 1 in Chemistry

n - 3*sqrt(n) = 28


How do I solve this?

2007-11-12 12:36:04 · 8 answers · asked by DoWHATiDO 3 in Mathematics

After the first digit, do the various digits appear with equal frequency.

2007-11-12 12:32:43 · 1 answers · asked by Roger Peters 2 in Mathematics

Do I have these correct:
A steel cylinder with a vol of 15.0 L is filled with 50g of nitrogen gas at 25 degrees celcius. What is the pressure of the N2 in the cylinder?

I got 5.82 atm's of pressure


2)
A container filled with 4.0 x 10^22 molecules of O2 at 5 degrees celcius and 845 mm HG. What is the volume in ML in the container

I got 1.36L which is .001mL

2007-11-12 12:31:48 · 3 answers · asked by shirah d 2 in Chemistry

AUG GUG GUU GUA UGU
AGU UUG UUA AUC UAU

2007-11-12 12:31:43 · 6 answers · asked by Anonymous in Biology

Name the leaf structures that help to conserve water

2007-11-12 12:31:03 · 2 answers · asked by ivory_plr 4 in Biology

2007-11-12 12:26:24 · 2 answers · asked by Tammy 1 in Chemistry

In particular...there is a "haunted" house that when the carriage goes by on the "haunted tour"...the street lights go off and a big wind blows in the street. Is this an example of SLI??

2007-11-12 12:25:52 · 5 answers · asked by Deenie 6 in Paranormal Phenomena

(n x a - n) (n x a - n)

2007-11-12 12:25:33 · 3 answers · asked by Sarah L 2 in Mathematics

2007-11-12 12:25:09 · 2 answers · asked by Anv 2 in Other - Science

If n^3 is a divisor of 10!, what is the greatest possible integer value of n?

2007-11-12 12:23:44 · 3 answers · asked by Anonymous in Mathematics

Two different quetsions

#1. The day after the election, the school newspaper headline read:"Donohoe wins! For every 3 votes for Trusty, there were 5 for Donohoe." If Trusty received 435 votes, how many votes did Donohoe receive?

#2. Four strips of paneling 40cm long and 4cm wide are arranged to form a square. What is the area of the inner square in cm squared?

2007-11-12 12:21:42 · 12 answers · asked by mistameter8292 1 in Mathematics

2007-11-12 12:20:58 · 13 answers · asked by scjordan 1 in Astronomy & Space

2. 7+11.436+3.08
3. 0.33 + 1.11 +3.2
4. $6.15 + $8.86
5. $16.81 + $19.94 + $11.49
First estimate, then find each difference.
6. 8.91 -6.08=
7. 9.1- 6.05=
8. 4-1.29=
9. 9-0.45=

2007-11-12 12:20:37 · 1 answers · asked by rosemariestewart64 1 in Mathematics

6x^2(p+q^2)-(p+q^2)
let u = (p+q^2)

6x^2u-u
(6x^2u-u)/u
6x^2-1

If this is not correct, please explain.

2007-11-12 12:20:22 · 2 answers · asked by Vampy 1 in Mathematics

Smack a hockey puck on ice and it slides across the ice. The force that keeps it moving is:
A. gravity
B. friction
C. an interaction with the ice and the air
D. none of these

i thought it was B but i think im wrong. help please!!

2007-11-12 12:20:18 · 23 answers · asked by Anonymous in Physics

Please help.

2007-11-12 12:18:53 · 6 answers · asked by Brittany 2 in Mathematics

-1/6d= -4
what does d equal.
thanks a lot!!

2007-11-12 12:17:34 · 8 answers · asked by mariah(: 3 in Mathematics

What is the best overall debate, and/or biggest controversy for any of these subjects.
"Dark Energy & Dark Matter"
"Black Holes"
"The definition/origin of a Planet, Pluto's status"

(EXTRA: And where would be the most informative place to get some research on it...?!?-Besides the NASA Site, Hubble's Site, or Wikipedia)

2007-11-12 12:17:17 · 3 answers · asked by Emocide Organ 3 in Astronomy & Space

I need to know the answer to the question and where you got the information from...please help me!!!!

2007-11-12 12:15:29 · 2 answers · asked by Jessica 2 in Biology