Physics - November 2006

From what I've read, quantum computers will be very fast but basically use the von Neuman architecture. I wonder if there could be a quantum neural net instead, and if so, what it would physically look like: size, parts, special needs, such as will it require supercooling or unusual power supply; will it incorporate an NMRI device, etc. The neural net question relates to whether it would need to be programmed or could it "learn" and eventually act as, say, an expert system. Would it occupy a large room or a small suitcase? (I'm not trying to build one, just to describe it for a fictional piece.)

2006-11-30 07:58:39 · 1 answers · asked by curiousdave141 1

Does anyone else think that the television show Mythbusters practices the worst type of science out there? Every episode I see them not practicing even the most rudimentry aspects of the scientific method. They rarely use controls and their experiments always have variables that they either overlook entirely or put into the project without thinking of it. They even give out flat out WRONG info on the program. I've seen an episode where they were shocking eachother with electricity and said that " There is not enough current to be deadly". Don't they know that a current of even .5 miliamps can be deadly to a person? I mean comeon it seems like these guys havn't even taken physics 101!

2006-11-30 07:57:06 · 5 answers · asked by travis R 4

2006-11-30 07:56:23 · 5 answers · asked by Stacy J 1

Any help on this problem would be greatly appriciated!

Objects with masses of 290 kg and a 590 kg are separated by 0.420 m.
(a) Find the net gravitational force exerted by these objects on a 36.0 kg object placed midway between them.
Your answer differs from the correct answer by orders of magnitude. (N)

(b) At what position (other than infinitely remote ones) can the 36.0 kg object be placed so as to experience a net force of zero?
(meters from the 590 kg mass)

2006-11-30 07:49:00 · 4 answers · asked by veneration0205 1

2006-11-30 07:43:09 · 4 answers · asked by big baby 1

2006-11-30 07:38:46 · 6 answers · asked by mrada6 2

I'm fascinated by particle physics, but I can't quite grasp quarks. What are they some kind of energy? Also, (in plain English) why do they have funny names like up, down, left, right, etc.?

2006-11-30 07:36:47 · 6 answers · asked by toko 3

2006-11-30 07:33:07 · 19 answers · asked by nothingspecial 1

seen a documentry on it, need others honest but serious opinions, ty.

2006-11-30 07:24:35 · 7 answers · asked by Gary88 1

A skydiver weighs 500 N, and has a mass of 50 kg. The skydiver jumps out of a plane, and falls through air. As the skydiver continues to fall and speed up, the air drag on them increases. After they've sped up to a certain speed, the force of air drag is 500 N upward on them.
What will now happen to the sky diver once the air drag equals their weight?

(CHOOSE ALL THAT APPLY)

[ ] Their velocity will decrease
[ ] Their acceleration becomes zero
[ ] They will stop in mid air
[ ] Their velocity will increase
[ ] They will maintain constant velocity from then on
[ ] They will still accelerate, but at less than "g"
[ ] They will no longer accelerate

2006-11-30 07:21:19 · 11 answers · asked by James W 2

2006-11-30 07:18:03 · 10 answers · asked by Dalia 1

2006-11-30 07:17:36 · 3 answers · asked by bmilojic 1

A friend of mine recently cam back from a motivational/self-esteem seminar. She said that one of the instructors told about a group of quantum physicists/scientists who were trying to figure out how to make quarks move. (I don't know why or how either.) After all the different methods they tried had failed, they finally noticed that a quark would move when a scientist had a thought about it moving (or something like that). I believe that the point of the story was to show a connection between positive thought processes and physical results. However, the whole story seems fabricated to me, just to prove a point. Does anyone know anything about this? Does anyone know enough about quarks to tell me whether this could be true or not?

2006-11-30 07:09:53 · 5 answers · asked by army of me 2

Why does string theory support multiple dimensions of space/time? Does having multiple dimensions logically disproves the string theory or does it support it?

2006-11-30 07:05:52 · 2 answers · asked by Anonymous

2006-11-30 06:55:17 · 3 answers · asked by beauty mirna 3

2006-11-30 06:46:29 · 13 answers · asked by Andrew goel 2

because of the amount of them and the energy they would create, they would cause a tidal wave....well what im trying to say is that,
if all the people in america jumped up and down would they lose any weight???

2006-11-30 06:29:12 · 11 answers · asked by TheLizardKing 3

When you see footballers kick a curling free kick the ball spins as we can see, say anti-clockwise for a right footer curling from right to left. When you kick a light plastic beach ball style ball in the same way it curves in the opposite direction. Why?

2006-11-30 06:24:44 · 2 answers · asked by Anonymous

An enemy ship is on the east side of mountain island. The enemy ship has maneuvered to within 2500 m of the 1800 m high mountain peak and only can shoot projectiles with an initial speed of 250 m/s. If the western shoreline is horizontally 300 m from the peak, what are the distances from the western shore at which a ship can be safe from the bombardment of the enemy ship?

2006-11-30 06:20:37 · 2 answers · asked by blacktwinus 2

2006-11-30 06:07:59 · 16 answers · asked by jo 1

2006-11-30 05:51:35 · 9 answers · asked by Anonymous

2006-11-30 05:45:37 · 15 answers · asked by mick f 1

A particle rotates counterclockwise in a circle w/ a radius of 7.4 m and a constant angular speed of 13 rad/s. At t = 0 the particle has an x coordinate of 4.9 m and y is greater than 0.

At t = 1.56 s
a) What is the x cooordinate of the particle (in m)?
b) what is the x component of the particle's velocity (in m/s)?
c) What is the x component of the particle's acceleration (in m/s^2)?

2006-11-30 05:26:52 · 3 answers · asked by Dee 4

2006-11-30 05:25:33 · 2 answers · asked by goring 6

A 12.0 kg cylinder rolls without slipping on a rough surface. At an instant when its center of gravity has a speed of 12.0 m/s.
(a) Determine the translational kinetic energy of its center of gravity.

(b) Determine the rotational kinetic energy about its center of gravity.

(c) Determine its total kinetic energy

2006-11-30 05:17:14 · 3 answers · asked by EWW 1

I mean, imagine you are in a really fast car travelling with your lights on illuminating the road ahead ... now if you are travelling faster than the speed of light would your headlight beam be able to 'catch up' with you and actually be in front of the vehicle, or doesn't it work like that. A question for all you Stephen Hawking geniuses out there !!

2006-11-30 05:00:39 · 11 answers · asked by gorgeousfluffpot 5

Inmy homework I need to draw examples of conductors and insulators, could anyone help?

2006-11-30 04:48:35 · 15 answers · asked by Anonymous

Determine the final temperature Tf, that results when 43 grams of ice at 0 °C are mixed with 300 grams of liquid water at 50 °C.
Specific heat of water: c = 1.00 cal/(gram*°C).
Heat of fusion for the ice - liquid water transition: cF = 79.7 cal/gram.

2006-11-30 04:36:17 · 1 answers · asked by Anonymous

2006-11-30 04:35:03 · 5 answers · asked by nbr1_nightstalker 1

Does magnetism really bend light?

2006-11-30 04:25:07 · 3 answers · asked by goring 6