Physics - August 2007

2007-08-13 14:24:54 · 3 answers · asked by donutlover15 1

2007-08-13 14:00:01 · 7 answers · asked by april b 1

2007-08-13 13:39:13 · 2 answers · asked by Brilliant Queen (BQ)_forever !!! 5

2007-08-13 13:13:32 · 15 answers · asked by ooari 2

The law of conservation of mass/matter, also known as law of mass/matter conservation states that matter cannot be created nor destroyed, although it may change form. How did Matter exist in the first place if not from a Creator?

2007-08-13 12:32:08 · 6 answers · asked by Argeth 1

How would it be possible to time travel. Cause u have to make a way to take down ur molocules or sumthing like that right. Can someone please explain this 2 me?

2007-08-13 11:07:08 · 15 answers · asked by Anonymous

Life should be defined as any grouping of atoms that sustains its structure by appropriating other forms of matter; energetic or otherwise.

This definition satifies all current accepted forms of life but also doesn't restrict life to having to have some basic elemental basis.

Just atoms, intelligent or not, maintaing their structure by utilizing the matter and energy around it...so rocks arent alive.

Stars are alive they are attempting to maintain their structure and can be thought of like fertilized chicken eggs. All the nutrients and foodstuff is in the shell to get the living zygote from a zygote to a chicken. The star has all the gases it needs to survive and maintain its state.

Fire isn't in itself alive because it doesnt have a atomic structure, its the free release of atoms and electrons, and is more a reaction than a proactive process.

So this definition is more of an atomic process than a molecular process. Thoughts?

2007-08-13 10:17:21 · 5 answers · asked by Jae G 2

explain using appropraite diagrams, how crystal field theory can explain why the 5 d orbitals in an octahedral complex are non degenerate?

I dont think it is the d orbital splitting, because they show the triple degenerate and doubly degenrate levels... plz help

2007-08-13 10:09:10 · 1 answers · asked by Anonymous

If I stand on a beach on the west coast of Britain, the waves are coming towards me. If I were standing on a beach on the east coast of America, the waves would also be coming towards me. At what place in the Atlantic do they change their minds?

2007-08-13 09:50:25 · 8 answers · asked by galyamike 5

2007-08-13 08:30:40 · 9 answers · asked by kalim 1

heyy. I need to know the atmospheric pressure or (barrometric pressure.) for yeaterday or today. A web sit that will give me it every day would be nice . Or if you happen to know this then that would be great. i need this for a science experiment.

2007-08-13 07:13:49 · 5 answers · asked by ilovesun 2

2007-08-13 07:10:04 · 6 answers · asked by psilocyphener 3

A. Voltage
B. Resistance
C. Direct Current
D. alternating current

2007-08-13 06:46:14 · 4 answers · asked by Anonymous

2007-08-13 06:30:26 · 11 answers · asked by just curious for answers 1

A solid cylinder of uniform density of 0.85 g/cm3 floats in a glass of water tinted light blue by food coloring

Its circular surfaces are horizontal. What effect will the following changes, each made to the initial system, have on X, the height of the upper surface above the water? The liquids added do not mix with the water, and the cylinder never hits the bottom.

A liquid with a density of 1.06 g/cm3 is poured into the glass
The cylinder is replaced with one that has the same height and diameter, but with density of 0.89 g/cm3.
A liquid with a density of 0.76 g/cm3 is poured into the glass.
Some of the water is removed from the glass
The cylinder is replaced with one that has the same density and diameter, but with half the height.
The cylinder is replaced with one that has the same density and height, but 1.5× the diameter.

2007-08-13 06:11:06 · 1 answers · asked by Anonymous

Every once in a while, cosmologists are dragged, kicking and screaming, into a universe much more unsettling than they had any reason to expect. In the 1500s and 1600s, Copernicus, Kepler, and Newton showed that Earth is just one of many planets orbiting one of many stars, destroying the comfortable Medieval notion of a closed and tiny cosmos. In the 1920s, Edwin Hubble showed that our universe is constantly expanding and evolving, a finding that eventually shattered the idea that the universe is unchanging and eternal. And in the past few decades, cosmologists have discovered that the ordinary matter that makes up stars and galaxies and people is less than 5% of everything there is. Grappling with this new understanding of the cosmos, scientists face one overriding question: What is the universe made of?

2007-08-13 06:10:35 · 8 answers · asked by calm x 1

A small solid sphere of mass M0, of radius R0, and of uniform density r0 is placed in a large bowl containing water. It floats and the level of the water in the dish is L. Given the information below, determine the possible effects on the water level L, (R-Rises, F-Falls, U-Unchanged), when that sphere is replaced by a new solid sphere of uniform density.

Answer can either be Rise, Falls Unchanged, rise or unchanged, fall or unchanged, or rise or fall or unchanged

The new sphere has radius R = R0 and mass M < M0
The new sphere has mass M < M0 and density r = r0
The new sphere has radius R > R0 and density r < r0
The new sphere has density r = r0 and mass M > M0
The new sphere has density r > r0 and mass M = M0
The new sphere has radius R > R0 and mass M = M0

2007-08-13 06:07:50 · 2 answers · asked by Anonymous

2007-08-13 06:07:30 · 9 answers · asked by salamnder 2

2007-08-13 05:52:05 · 10 answers · asked by Anonymous

If dark matter comprises 25% of the universe's energy and mass total, shouldn't it be easier to find? Is it hard to find because it is....the only word that comes to mind is "Inert"....to interaction with any way we might detect it? Still, as 25% of the universe, wouldn't you expect to bump into a chunk of it now and then?

2007-08-13 05:47:50 · 7 answers · asked by John T 2

2007-08-13 05:43:53 · 5 answers · asked by Anonymous

Because the earth is round, there is observable horizon.

What should be the pressure of atmosphere to make the surface of the earth to appear flat, and horizon disappear?

Refraction index of standard air at sea level is
no = 1.00029

2007-08-13 04:53:55 · 3 answers · asked by Alexander 6

if i am not mistaken...a binary star system is where to two stars revolve around each other about a central point...shouldnt it be the same case with the earth and the moon? y not? if its the same...the period of rotation should change right? according to the conservation of angular momentum...

2007-08-13 04:43:48 · 10 answers · asked by chryses 1

If nuclear power is clean can anyone tell us how long before Chernobyl is safe to live in again and how many have died as a result of the near meltdown of this reactor.

2007-08-13 03:57:40 · 7 answers · asked by Francis7 4

plzzz try and answer within a hour

2007-08-13 03:14:00 · 4 answers · asked by Swetha C 1

I have two math problems that I can't figure out.
1. What is the instantaneous velocity of a freely falling object 10 s after it is released from rest? What is the average velocity during this 10-s interval? How far will it fall during this time?

2. Kenny drops his physics book of a balcony. It hits the ground below 1.5 s later. With what speed does it hit? How high is the balcony? Ignore air drag.

Any help would be appreciated.

2007-08-13 03:10:39 · 2 answers · asked by Anonymous

A crt works with electrons hitting a phosphor screen not with light.
light being a paticle..nonsense..if u cut a million slits in a piece of card and shine a light its the same wave going through these slits but divided into a million pieces but still carrying same information.
light being self propagating is like saying perpetual motion exists.. it need energy to sustain it.
light is not affected by gravity however the fabric of the universe is.
stretch the fabric into long thin lines also affects the light

2007-08-13 03:06:55 · 12 answers · asked by Anonymous

what is difference between reactance and inductance???

2007-08-13 03:05:52 · 5 answers · asked by chandra p 1

It is one of the applications of ultrasonic waves

2007-08-13 02:27:23 · 1 answers · asked by karthikeyan v 2

how did antimatter figure into Star Trek? Would it really work? If you aren't a Trekkie you may have to find an old episode - they're on all the time!

2007-08-13 02:14:46 · 5 answers · asked by Anonymous