Science & Mathematics - 29 January 2007

I need to make a vacuum for science class. How would I make one?

2007-01-29 01:41:33 · 4 answers · asked by Anonymous in Physics

2007-01-29 01:41:26 · 25 answers · asked by anand m 1 in Astronomy & Space

its for a schools thing. so... i need correct info.

2007-01-29 01:40:26 · 3 answers · asked by Anonymous in Physics

2007-01-29 01:39:22 · 5 answers · asked by Darth Plagueis 3 in Zoology

2007-01-29 01:38:34 · 2 answers · asked by Sir D 1 in Physics

2007-01-29 01:38:04 · 5 answers · asked by Lao Ban 1 in Zoology

2007-01-29 01:37:46 · 3 answers · asked by barry w 1 in Geography

Using lab equipment, namely a spring, a mass, timers etc
How?
This should be at AS level, I just need an experiment!
Thanks xxxXxxx

2007-01-29 01:36:40 · 4 answers · asked by Anonymous in Physics

Suppose a container with a fluid is kept somewhere on the earth. Now, due to the gravity of the earth, the atmosphere will exert a force on the vapour just above the fluid, which is its weight (of magnitude F, say). Then, according to Newton's Third Law of Motion, the vapour just above the fluid will exert an equal & opposite force on the atmosphere (of magnitude F). Since the areas on which the two forces are acting is the vapour of the fluid just above the fluid surface, the pressure exerted by both the forces is the same, 'coz pressure=force/area.

According to definition, boiling point of a fluid is the temperature at which vapour pressure = atmospheric pressure. But we have found (in the above statement) that vapour pressure = atmospheric pressure at all conditions.

What this logic also implies is that any fluid will boil at any condition of pressure & temperature,even at absolute 0, and in gravity-less space.

Where have I gone wrong with my reasoning? Please specify.

2007-01-29 01:36:20 · 2 answers · asked by Kristada 2 in Chemistry

light can travel millions of kilometres in outer space, but the deep ocean with a depth of more than 2000m is often pitch black. suggest why?

2007-01-29 01:34:04 · 8 answers · asked by rraa124 1 in Earth Sciences & Geology

Why satellites are directly above the equator? and all at the same height? is it related to kepler's 3rd law?

2007-01-29 01:31:35 · 5 answers · asked by jimmymasterhk 1 in Astronomy & Space

2007-01-29 01:29:35 · 1 answers · asked by RED ROSE 5 in Engineering

30. Solve this inequality: 3q + 11 + 8q › 99.
A. q › 11
B. q › 1/8
C. q › 88
D. q › 8
40. Simplify this expression: 4p + 9 + (-7p) + 2 =?
A. 11p + 11
B. 3p + 7
C. -3p + 11
D. 3p + 11

41. Solve this equation: -9h - 6 + 12h + 40 = 22.
A. h = 24
B. h = 4
C. h = - 4
D. h = -4/7

56. Solve this inequality: 3p - 16 ‹ 20.
A. p ‹ - 12
B. p ‹ 1/3
C. p ‹ 12
D. p ‹ 1 1/3

62. Solve this inequality: j/4 - 8 ‹ 4.
A. j › -12
B. j ‹ 12
C. j ‹ -48
D. j ‹ 48

2007-01-29 01:28:24 · 4 answers · asked by Blaze T 2 in Mathematics

2007-01-29 01:24:24 · 5 answers · asked by rajiv 1 in Botany

2007-01-29 01:23:10 · 21 answers · asked by Anonymous in Astronomy & Space

earth science student --novanet is asking me questions about the rising and setting of the moon & it isn't giving me any halp in the lessons

2007-01-29 01:21:24 · 1 answers · asked by gerbil 1 in Astronomy & Space

light can travel millions of kilometres through outer space, but the deep ocean with a depth of more than 2000m is often pitch black. suggest why?

2007-01-29 01:20:31 · 3 answers · asked by rraa124 1 in Earth Sciences & Geology

hov have you been

2007-01-29 01:15:29 · 23 answers · asked by rustem u 2 in Geography

2007-01-29 01:15:19 · 3 answers · asked by jana l 1 in Physics

match your answer http://blogs.ibibo.com/youngindian

2007-01-29 01:15:16 · 5 answers · asked by stella_sds 1 in Zoology

WHAT WOULD BE THE BETTER CENTRAL TENDENCY FOR MEAN=74.87 OR MEDIAN 81

2007-01-29 01:14:52 · 2 answers · asked by LaDy A 2 in Mathematics

2007-01-29 01:10:54 · 1 answers · asked by Anonymous in Physics

2007-01-29 01:08:51 · 14 answers · asked by Veretta S 1 in Astronomy & Space

please help me

2007-01-29 01:08:36 · 15 answers · asked by Anonymous in Mathematics

2007-01-29 01:06:53 · 11 answers · asked by thecharleslloyd 7 in Zoology

types of space shuttle

2007-01-29 01:05:53 · 6 answers · asked by santosh n 1 in Astronomy & Space

I have a so many doubt in Algebra Specially in Quadratic Equation, Permutation & Combination, Binomial Theorem & Mathematical Induction, Sequence & Series. Where Could I find a Best Tutorial or Books for This. If someone knows a best books or website for Algebra. Please give me a Name. Thanks in Advance.

2007-01-29 01:04:47 · 3 answers · asked by Anonymous in Mathematics

WHAT WOULD 17-6(10)/2+12 BE SiMPLiFiED?

2007-01-29 01:04:42 · 6 answers · asked by LaDy A 2 in Mathematics

how and where to get the forms of CET

2007-01-29 01:04:28 · 1 answers · asked by saptakv 1 in Engineering

If you have a block of mass 100kg, initially at rest and drop it 10m and it impacts the ground and does not bounce it just lands flat. What are the forces it imparts on the ground and what are the forces the ground imparts on it.

I have tried simply v=(gt)^.5 and d=.5 gt^2 and solved for the finial velocity and time and calculated acceleration = change in v/ change in t, which I get the force of gravity F=ma then W=mg and the total F= ma-mg which turns out to be zero. What am I doing wrong?

2007-01-29 01:03:36 · 6 answers · asked by marry a 1 in Physics