Science & Mathematics - 8 October 2007

A square computer screen measures 14 inches along its diagonal. How many inches long is the perimeter? Round your answer to the nearest whole number.

please help me solve this!
thanks! :-D

2007-10-08 14:41:23 · 5 answers · asked by Anonymous in Mathematics

Please help me i cant seem to figure it out.

Thanks

2007-10-08 14:39:06 · 12 answers · asked by PrincessBri 1 in Mathematics

Most beginning workers using microscope use the highest power (magnification) possible. Experienced people learn to use low power (magnification) most of the time. Why is that?

When and why do you the settings to the diaphragm? (the knob at the bottom of the stage with five holes where the light shines through) Such as... why use the small opening on high power?

2007-10-08 14:38:29 · 1 answers · asked by peels sleep 1 in Biology

A sheet of gold weighing 10.0g and at a temperature of 18.0 degrees celcius is placed flat on a sheet of iron weighing 20.0g and at a temperature of 55.6 degrees celcius. What is the final temperature of the combined metals? Assume that no heat is lost to the surroundings.

Could you show step by step on how to do it. Please and thank you.

2007-10-08 14:38:23 · 1 answers · asked by bryon_barker 2 in Chemistry

Please help me! I cant figure it out because of the cube part! and please show how you go the answer! =]

2007-10-08 14:37:30 · 5 answers · asked by Anonymous in Mathematics

I have a 3 year old and a 9 month old. Occasionally my 3 year old wakes up in the middle of the night, crying hysterically and when I go in to comfort him, he stares at the corner of the room and points. My 9 month old has started freaking out for no reason in the room as well. Has anyone had an experience like this with their kids, and what did you do to resolve it?

2007-10-08 14:36:42 · 15 answers · asked by awatchme 2 in Paranormal Phenomena

2007-10-08 14:35:56 · 1 answers · asked by KRISTINE 1 in Physics

I can't figure this dang thing out:

Assume the reaction of 51.47 g of Ge in the following reaction to determine the other quantities.

3Ge + 2N2 -> 1Ge3N4
moles of Ge reacting =
moles of N2 required =
moles of Ge3N4 formed =
mass of Ge3N4 formed =

I have ge and n2 as .71 and .47, which are correct, but I can't seem to figure out that last two. Please help!!!

2007-10-08 14:35:32 · 1 answers · asked by Anonymous in Chemistry

A cube is made of a white material, but the exterior is
painted black. If the cube is cut into 125 smaller
cubes of exactly the same size, how many of the
cubes will have 2 of their sides painted black?

2007-10-08 14:34:25 · 4 answers · asked by Jonathan 2 in Mathematics

Apollo mission rocket. Imagine 4 bolts holding it down during launch. Forget the fact that they would probably melt.

2007-10-08 14:34:12 · 4 answers · asked by Anonymous in Engineering

(where did it come from?)

2007-10-08 14:32:41 · 1 answers · asked by koolkid776 1 in Other - Science

What would life be like in a space shuttle?(like going to the toilet and having a shower)

2007-10-08 14:32:03 · 2 answers · asked by Anonymous in Astronomy & Space

2007-10-08 14:29:47 · 10 answers · asked by Anonymous in Agriculture

find the derivative of..


ds/dt if s= t/(2t+1)


answer: 1/(2t+1)² but i need to know how to get there

thanks!

2007-10-08 14:28:23 · 4 answers · asked by Katie 4 in Mathematics

They are:
a. Aluminum reacts with KOH and water forming potassium ions, [Al(OH)4]- and hydrogen gas.

b. Hydrogen ions from H2SO4 react with the tetrahydroxaluminate ions [Al(OH)4] to precipitate aluminum hydroxide.

c. Aluminum hydroxide reacts with aditional hydrogen ions and water to form [Al(H20)6]^+3

d. Alum forms from the potassium ions, hydrated aluminum ions, sulfate ions and water.

2007-10-08 14:26:37 · 1 answers · asked by Anonymous in Chemistry

please show steps
Mean Value theorum states
f(b) - f(a)= f'(c)(b-a)

2007-10-08 14:23:37 · 1 answers · asked by lana 1 in Mathematics

2007-10-08 14:21:41 · 7 answers · asked by gelo 2 in Astronomy & Space

a.4
b.9
c.2
d.12

2007-10-08 14:21:22 · 5 answers · asked by isabela 2 in Mathematics

Could someone show me what I did wrong?

Thank YOu!

2007-10-08 14:20:22 · 9 answers · asked by Anonymous in Mathematics

2007-10-08 14:19:51 · 8 answers · asked by tylor h 1 in Zoology

2007-10-08 14:19:44 · 5 answers · asked by laurabird 3 in Astronomy & Space

I have done this but I think I missed a step. The grid is 4 squares by 4 squares for a total of 16 square boxes in all. How many squares can you get out of the grid? I think its 30 but I am not the best at math. I drew a bunch of grids and tried it that way. But, here's the thing that's bugging me. I did this years ago and I think you can actually get squares using a section of 3 squares by 3 squares within the four square box

2007-10-08 14:16:49 · 8 answers · asked by ItsMee! 2 in Mathematics

I'm confused- I heard the Bohr model works only for hydrogen? Can someone explain what his model was/what it applies to?

2007-10-08 14:16:30 · 1 answers · asked by Anonymous in Chemistry

i can't seem to find one that has the atomic # AND the atomic mass
can anyone give me a link to where it's at
the one with the best periodic table gets best answer and 10 points ! :)
thanks

2007-10-08 14:16:04 · 1 answers · asked by ♥ mimi ♥ 7 in Chemistry

I cant figure out my 13 year olds homework!!

2007-10-08 14:13:41 · 10 answers · asked by cpc_juli 1 in Mathematics

The Tangent Universe Has Unfolded?
I moved forward in time quickly today...

i can push/accelerate time, but how do i pause it?

2007-10-08 14:10:38 · 10 answers · asked by Anonymous in Other - Alternative

How does this work out?

where x^(1/3) times 3x^2
(the third root of x) times (three x squared)

becomes
x times 9x^2
(x) times (9 x squared)

How does that work out?? It seems to me that it should come out to be:

3 x^(7/3)
(3 x to the seven/thirds power)

2007-10-08 14:10:05 · 4 answers · asked by E 2 in Mathematics

Why is the diameter of a mercury barometer irrelevant?

2007-10-08 14:08:28 · 4 answers · asked by longd 3 in Weather

For a project we have to drop a egg off a building and try to make it not brake.
We can use either use
1. 100 straws and 2 meter of tape
or
2. 50 index cards and 2 meter of tape

What should I use the straws or index cards. When you choose one tell me what I should do with them to keep the egg from braking.

2007-10-08 14:08:01 · 2 answers · asked by Joel 3 in Engineering

A frictionless roller coaster is given an initial velocity of V(intial) at height h= 26 m. The radius of curvature of the track at point A is R=38 m. The acceleration of gravity is 9.8 m/s^2
Find the maximum value of Vinitial so that the rooler coaster stays on the track at solely becasue of gravity. Answer in units of m/s.
Please help me with this problem, i have been tried to work it out many time but it wasn't correct

2007-10-08 14:07:41 · 1 answers · asked by Tony 1 in Physics