Science & Mathematics - 11 July 2007

please show work

2007-07-11 04:11:52 · 4 answers · asked by Anonymous in Chemistry

if a year is so many hours and days and minutes, why not put clocks forward every year, instead of adding an extra day on a four year cycle, is time ever correct

2007-07-11 04:11:26 · 9 answers · asked by brownhuggy 1 in Weather

2007-07-11 04:09:51 · 9 answers · asked by Chelsea 1 in Zoology

Please show work

2007-07-11 04:06:54 · 1 answers · asked by Anonymous in Chemistry

LOL... really tho, is spontaneous combustion possible?!

2007-07-11 04:02:36 · 11 answers · asked by theskyisthelimit02 3 in Physics

3 MEN GO INTO A MOTEL. THE MAN BEHIND THE DESK SAID THE ROOM IS $30, SO
EACH MAN PAID $10 AND WENT TO THE ROOM.

A WHILE LATER THE MAN BEHIND THE DESK REALIZED THE ROOM WAS ONLY $25, SO
HE SENT THE BELLBOY TO THE 3 GUYS' ROOM WITH $5.

ON THE WAY, THE BELLBOY COULDN'T FIGURE OUT HOW TO SPLIT $5 EVENLY
BETWEEN 3 MEN, SO HE GAVE EACH MAN A $1 AND KEPT THE OTHER $2 FOR
HIMSELF.

THIS MEANT THAT THE 3 MEN EACH PAID $9 FOR THE ROOM, WHICH IS A TOTAL OF
$27, ADD THE $2 THAT THE BELLBOY KEPT = $29.

WHERE IS THE OTHER DOLLAR?

2007-07-11 04:02:35 · 14 answers · asked by Barron L 1 in Mathematics

2007-07-11 04:00:58 · 9 answers · asked by seahawk_1614 1 in Mathematics

5 coefficent of sqrt 2 * 2 coefficient of sqrt 18 - I can't figure how the process works with this. The answer is 60, but how was that done? I'd appreciate a demonstration. Thanks!

2007-07-11 04:00:55 · 0 answers · asked by ♫ ∫aoli 4 in Mathematics

find the solutions for the ff: (value/s of x)

1) sqrt of (2x + sqrt of 7x+x) = 3
2) 4th root of x + 2 sqrt of x = 3

2007-07-11 04:00:25 · 1 answers · asked by rock-onz 1 in Mathematics

2007-07-11 03:59:16 · 6 answers · asked by seahawk_1614 1 in Mathematics

think outside the box.

2007-07-11 03:55:25 · 12 answers · asked by Anonymous in Physics

plss list all the properties first,,then can describe down the group and across the period for each,,
in order to avoid any confusion,,
and also plss state if there r any exceptions plss,,


thanx,,

2007-07-11 03:54:57 · 3 answers · asked by gunkedar 2 in Chemistry

how about a humain hair?

2007-07-11 03:54:05 · 7 answers · asked by Anonymous in Physics

If the garden box has dimensions x by x feet and an area in square feet equal to the perimeter in feet, what is the value for x that satisfies the requirements? (Hint: The box is a square.)

2007-07-11 03:52:03 · 9 answers · asked by Anonymous in Mathematics

ethylcyclopropane

2007-07-11 03:51:23 · 3 answers · asked by Anonymous in Chemistry

basically could you direct microwaves into the air and accelerate them like you would inside of a microwave oven?

2007-07-11 03:50:17 · 7 answers · asked by Bryan Smith 1 in Physics

2007-07-11 03:48:55 · 7 answers · asked by Tory G 1 in Botany

2007-07-11 03:47:29 · 9 answers · asked by Hemant D 1 in Engineering

Do you reckon my old old school rugby top could work as a decent filter to get an acetomophen (spelling?) precipitate out of an aqueous solution (not saying what :) )

2007-07-11 03:44:43 · 3 answers · asked by malaysniper 2 in Chemistry

2007-07-11 03:37:23 · 2 answers · asked by pidugu k 2 in Chemistry

thanks

2007-07-11 03:32:21 · 4 answers · asked by Anonymous in Physics

solar power energy operates on aircon?what is the main idea about this topic

2007-07-11 03:28:49 · 1 answers · asked by ARNEL S 1 in Engineering

Hmmm... Go for it!

2007-07-11 03:27:02 · 4 answers · asked by blueroro93 2 in Chemistry

"950W of power at 45km.hr winds
Delivers 100 Kw / hours a month at an average wind speed of 5.4 m/s
Adjustable voltage (12/24/36/48V)"

Can someone please tell me what that means? And my question is would you be able to indefinitely power a small fridge, a TV and other things on that wind turbine which costs $3 000?

2007-07-11 03:25:59 · 4 answers · asked by ryseesdg 1 in Other - Science

The Beretta Model 92S (the standard-issue U.S. army pistol) has a barel 127mm long. The bullets leave this barrel with a muzzle velocity of 335m/s.

a) What is the acceleration of the bullet while it is in the barrel, assuming it to be constant? Express your answer in m/s^2 and in g's.
b) For how long is the bullet in the barrel?

Answer:
a) 4.42 x 10^5m/s^2 = 4.51 x 10^4g
b) 0.758 ms

I need to know how to get the answer. Please help.

2007-07-11 03:22:13 · 4 answers · asked by Cheat Sum 4 in Physics

(1+sin2x) dx

the sin 2x should be sin squared x

2007-07-11 03:11:40 · 4 answers · asked by Raymond L 1 in Mathematics

......................say a photon is leaving a star which is moving away from us, by the doppler effect the photon will be red shifted, hence it's wavelength has incresed. But the energy of a photon is given by E=hc/wavelength, where h is planks constant and c the speed of light. so if you were to measure the energy the photon had when leaving the star
(you being stationary with respect to the star) compaired to it reaching earth it would have lost energy just because the star was moving away? what happend to this energy or is it just a relitive thing? any comments welcome. Thanks.

2007-07-11 03:09:23 · 7 answers · asked by s 2 in Physics

many years ago, and isn't accurate, then how can we be sure that daytime isn't nightime and nightime isn't daytime? Also, who set breakfast, lunch and tea time? I'm very confused, someone help!!!!

2007-07-11 03:06:09 · 11 answers · asked by steph d 2 in Astronomy & Space

2007-07-11 03:05:04 · 5 answers · asked by J.C. 2 in Astronomy & Space

wat is the Net Ionic Equation for the reaction that occurs when small amounts of hydrochloric acid are added to HOCL/NaOCl buffer solution?
a. H + H20-> H3O
b. H + OCl-> HOCL
c. HOCl-> H + OCl
d. H + HOCl-> H2OCl
e. HCl + HOCl -> H2O + Cl2

i have no clue how to figure out this one!! thanxx

2007-07-11 02:53:15 · 1 answers · asked by nismo man 1 in Chemistry