Physics - August 2007

This is the idea that the past itself is an impenetrable wall, and that we can only access it mentally. Other energies cannot enter, so they bounce of of it. This makes time travel into the elasped past impossible as well...

2007-08-15 20:07:36 · 3 answers · asked by sassychickensuckerboy 4

2007-08-15 18:40:32 · 14 answers · asked by Neeraj K 2

Plsss help .All that geek stuff and complex organic chemistry diagrams plus calculus and mechanics diagrams Wave forms how do I get those pictures made easily and write papers and books . Which software should I look for. I work on windows platform and feel comfortable with GUI and WYsWYG but all suggestion are mosst welcome. Thanks,

2007-08-15 18:17:02 · 4 answers · asked by Anonymous

What are three differences in the structure and operation of photocells and photovoltaic cells?

2007-08-15 17:50:58 · 2 answers · asked by th3one101 2

A hallow cylinder is positioned vertically such that its axis is orthagonal to the ground. A small ball is placed inside of the cylinder and made and made to revolve around the inside of the cylinder. Picture a marble whirling around the inside of a coffee can that is sitting in a normal position. The coefficient of static friction between the ball and the cylinder wall is assumed to be infinite, in other words the points of contact of the cylinder and ball have itentical velocities and no slipping occurs provided there is any arbitrary amount of normal force. The question: at what speed, if any, will the ball continue to revolve around the cylinder without spiraling down into it? Keep in mind that the ball has angular momentum parallel to its axis of rotation, and that the ball cannot slip down the sides, it must roll. Keep also in mind that if the angle of the balls axis changes to that of the cylinder then the circle defining the points of contact will no longer be the equator.

2007-08-15 17:48:08 · 5 answers · asked by damonago45 2

A)50dB
B)90dB

2007-08-15 16:30:38 · 2 answers · asked by Anonymous

A) 1.0W/m^2
B)10^-12W/m^2
C)normal conversation
D) the threshold of pain

2007-08-15 16:29:31 · 3 answers · asked by Anonymous

A box slides down an incline with uniform acceleration. it starts at 0m/s and reaches 2.7m/s in 3s.

Find the acceleration and the distance moved int he first 6s.

2007-08-15 16:23:37 · 3 answers · asked by Anonymous

I read that nuclear fission causes a chain reaction of energy being released, but it didn't tell me what would happen if the chain reaction was not stopped, only that it was similar to an atomic bomb. Obviously, an atomic bomb does not explode forever, so what stops it?

2007-08-15 15:56:32 · 7 answers · asked by Anonymous

2007-08-15 15:50:11 · 3 answers · asked by Anonymous

This is assuming it has no moving parts (such as hard drives). I don't think it can (unstable parts and such), while some friends think it can. I'm really curious about whether it can.

2007-08-15 15:47:22 · 6 answers · asked by Zach 2

what happens to the mass of gas when the temperature goes up

2007-08-15 14:33:45 · 4 answers · asked by Pre lives on 5

when the temperature of the gas rises what happens to the density of the gas"

2007-08-15 14:24:28 · 10 answers · asked by Pre lives on 5

2007-08-15 14:16:33 · 2 answers · asked by are-u 1

2007-08-15 13:37:34 · 3 answers · asked by WordBarker/singlething 2

2007-08-15 13:22:33 · 2 answers · asked by JAMES 4

2007-08-15 13:07:57 · 7 answers · asked by nightowl 2

Why is the speed of light so special compared to any other speed.
why does the universe allow this speed and giving light the privalige to use it
some say light has massless particle properties.
if that were the case then gravity would have no effect on a massless object would that not be true..

2007-08-15 12:35:59 · 25 answers · asked by Anonymous

2007-08-15 11:45:23 · 16 answers · asked by AntikristPrinceWilliam 3

That does make sense doesn't it!?!

I have heard that energy efficient light bulbs use 30 mins worth of energy to light but are more efficient to keep running. Is this right? If so, should I be using normal bulbs in areas like halls and bathrooms where you don't have the light on very long?

2007-08-15 11:26:29 · 2 answers · asked by laura231004 3

2007-08-15 10:22:01 · 14 answers · asked by S.G. S 1

it defies the logic of space...

2007-08-15 10:17:10 · 18 answers · asked by bob 3

Many time travel movies have been produced, fascinating many sci fi fans for years. My question is whether it is possible to interact with people, places, and events and affect outcomes in the future from that time or rather that our role would be merely that of an observer, having read a book that had been written but cannot be edited.

2007-08-15 10:03:44 · 16 answers · asked by Danman 1

i am adding vectors and once i do all the junk and get an answer like -82.19, how do i know what quadrant it is in. because i know that q.1, i don't add anything but the other three i do, just how do i know the quadrant?

thanks!

2007-08-15 09:17:59 · 4 answers · asked by Elizabeth 3

when a solid is heated the mollecules expand and move apart in each stage, therefor when you freeze water, it should shrink as the mollecules get closer together to become a solid. anyone know why it expands instead?

2007-08-15 09:01:31 · 13 answers · asked by Anonymous

can anyone describe please! the energy conversion of a television?

thank you!!!!!!!!!!!!!!!!!

2007-08-15 08:36:14 · 2 answers · asked by Anonymous

In what ways are sound and light waves similar?

Are they both a form of energy?
Do they both behave as both particles and waves?
Can they both experience interfierence
Do they both move in 3-dimensional space?
Are they both transverse and therefore both can be polarized?

2007-08-15 08:23:40 · 2 answers · asked by lala 2

Okay so here it goes:

E = Energy

Unit of Energy = Joule = Kg *m/s^2

However the equation E = mc^2

m = mass (kg)

c = speed of light (m/s^2)

if you square the units of the speed of light you get m^2/s^4

so the equation E = mc^2 yields the units Kg*m^2/s^4, when it should yield Kg*m/s^2

What the hell?

2007-08-15 08:22:48 · 10 answers · asked by Anonymous

2007-08-15 08:18:14 · 5 answers · asked by riogrande_texas 1

(dedicated to the "What should I do Retard" RIP)
Last I saw him, he was hiding in his box with his canister-toy, but I am too afraid to look in the box.

2007-08-15 07:00:35 · 12 answers · asked by Ultrastooge™ 2