Physics - January 2007

2007-01-01 14:44:07 · 6 answers · asked by Paul Foglino 1

My friend says light acts like a wave. I say light acts like a particle. Who's right? There is a pumpkin patch tour riding on this.

2007-01-01 14:33:45 · 14 answers · asked by Anonymous

20 kg mass is being held by two cables. Both are at 40 degree angles with mass. Find the tension in the two cables. Mass is suspended and in equilibrium

2007-01-01 14:33:05 · 1 answers · asked by mgwink@ameritech.net 1

I do not want it to be lord of the rings, that will just up the price. I only want the holographic chamber. If you know please tell me where and how much. I have used google for about 3 hours (several search key words) trying to find it.
http://www.noblecollection.com/catalog/product.cfm?id=NN9622&catid=17

2007-01-01 14:23:20 · 1 answers · asked by quaeritoveritas 2

physics/electronics

2007-01-01 14:20:55 · 7 answers · asked by amit arcchi 1

Albert Einstein

2007-01-01 13:55:50 · 13 answers · asked by Miss J 3

And a related question, what happens when an electron collides with a proton?

2007-01-01 13:54:35 · 12 answers · asked by Jess 2

The reason I wonder is the bulbs in my bathroom state they last about 1500 hours. I know we use them only about 2-3 hours a day which would put to last over a year and I know they don't last that long . I know I can buy the longer lasting bulbs but is the industry lying about how long the low end bulbs last or is it based on being left on?

2007-01-01 13:38:16 · 10 answers · asked by Anonymous

I heard that the television is like an x-ray or emits radiation of some sort.

2007-01-01 13:28:00 · 17 answers · asked by janet 1

A pulley system lifts a 1,345 N weight a distance of .975 m. Bart the physics guy's helper Larry pulls the rope a distance of 3.9 m exerting a force of 375 N.

What is the Ideal mechanical advantage?!

2007-01-01 13:16:08 · 3 answers · asked by pmwschoolstore 1

2007-01-01 12:40:55 · 6 answers · asked by Anonymous

A ball rolls horizontally with a speed of 7.6 m/s off the edge of a tall platform. If the ball lands 8.7 m from the point on the on the ground directly below the edge of the platform, what is the height of the platform?

2007-01-01 12:37:15 · 4 answers · asked by Brad G 1

2007-01-01 12:36:19 · 4 answers · asked by Anonymous

In an RC circuit diagram, if there are two capacitors on either side of a corner, but they are not parallel, would they be considered a series?

I'm not sure if my description makes sense, but I don't know how else to explain it...maybe, imagine a square, and stick one corner in between the two capacitors...

2007-01-01 12:21:49 · 5 answers · asked by Anonymous

someone give me some advice on this question please

2007-01-01 12:20:49 · 2 answers · asked by Anonymous

Distance, displacement, vectors, scalars, weight, mass, friction, inertia, gravity, equiblium and stability in sport

2007-01-01 11:57:03 · 3 answers · asked by Anonymous

For example:

In x-ray machines, electrons are subjected to electric fields as great as 6.0 x 10^5 N/C. How would you find an electron's acceleration in this field, given the mass of the electron and e?

2007-01-01 11:55:24 · 2 answers · asked by rellthevegan 1

The electric field associated with a uniformly charged hollow metallic sphere is the greatest at:

A. the center of the sphere
B. the sphere's inner surface
C. infinity
D. the sphere's outer surface

I was thinking D, the outer surface, because if you put a test charge (which is always positive) just above the surface, the electrons will be concentrated toward the outer surface. Is this correct? If not, why?

2007-01-01 11:44:18 · 3 answers · asked by Anonymous

In M theory there are 11 dimensions. Besides the common three axis, time, and the eleventh that seems to tie it all together what are the other six dimensions?

2007-01-01 11:25:57 · 2 answers · asked by gatzap 5

2007-01-01 11:21:28 · 18 answers · asked by blake_hanson_2005 2

(1)The avrg. speed of a runner in a 400 meter race is 8m/s. How long did it take the runner to complete the race?
I got 50s. Is that right?

(2)Which statement about the movement of an object with zero acceleration is true? The object must be at rest. Is that right?

(3) An object travels for 8 seconds with an avrg. speed of 160 m/s. The distance traveled by the object is ... 20m. Is that right?

That's all thank you so much for your time!!

2007-01-01 11:20:34 · 5 answers · asked by Anonymous

I was just curious how many different "worlds" there are, if there indeed are any other than this one.

2007-01-01 10:52:36 · 12 answers · asked by Anonymous

I admit, I know next to nothing about electricity, thats why im asking this question.

I want to know what is required to "stretch" my AC electricity in my house. I want to take my "true sine wave" coming into my house, and convert it into a "square sine wave" that will give me ability to power more things for less money. I dont know if this will save money, but it should at least in theory work to power things. I got this idea from looking into a RV and their electrical systems, and learned that they have DC to AC converters to power AC appliances. (although most things run off DC, like a laptop, and in your house you use a AC to DC adapter to power your laptop, cell phone etc.) so you can eliminate the AC to DC adapter for many things in a RV. But the (cheaper) DC - AC adapters also have some unique properties, like giving a "square" sine wave, which messes up digital clocks, breadmakers. - Can I save electricity /money by converting from true to square sine waves in my house?

2007-01-01 10:45:29 · 3 answers · asked by WindowsY2K 1

So for my science fair project, I did what shape of balloon would travel further, the long and skinny kind you can use to make into animals, or the regular round type. Because of the way they're shaped, I thought that the long and skinny ones would go further. Well, we put the same number of pumps into each balloon, 10, and know it's close to the same amount because we used a balloon pump. But the round ones went the furthest, their distances varying from 10"1' to 10"11' . The long and skinny ones went from 5"8' to 9"2'. What causes this, assuming it relies only on the shape of the balloon and not other factors?
So basically, why do regular balloons travel longer than the long and skinny ones.

2007-01-01 10:40:50 · 3 answers · asked by Briar 4

Why no passengers get electric shocked by Electrified Bus and Train? Even on rainy days.

2007-01-01 09:47:08 · 2 answers · asked by sel_bos 3

Two blocks of masses M and m, with M > m, are connected by a light string. The string passes over a frictionless pulley of negligible mass so that the blocks hang vertically. The blocks are then released from rest. What is the acceleration fo the block of mass M?


Please help!

2007-01-01 09:38:02 · 6 answers · asked by sur2124 4

An aluminum block with a mass of 1 kg moves to the left with a constant velocity of 8 meters per second. After striking a spring, the clock is brought to rest in 0.005 second as the spring is compressed.


*a. what is the magnitude of the momentum change of the block in coming to rest?
*b. what is the average force exerted on the spring by the block a the block is brought to rest?
*c. The energy of the spring at its maximum compression is nearly ________.


can you show it step by step please?

2007-01-01 09:33:16 · 8 answers · asked by blah 3

Assume ideal conditions for the apparatus illustrations in the picture. What is the acceleration of the system if...


(a) m1 = 0.25 kg, m2 = 0.50 kg, and m3 = 0.25 kg

(b) m1 = 0.35 kg, m2 = 0.15 kg, and m3 = 0.50 kg

I made a quick version of the picture on paint, http://www.geocities.com/grouchy187/picture.bmp

I also found the answer in the back of the book...
a) 2.5 m/s^2 to the right
b) 2.0 m/s^2 to the left

Any help would be appreciated, thx in advance.

2007-01-01 09:14:26 · 3 answers · asked by grouchy187 2

If, as you approach the speed of light, mass increases so that you would need an infinite amount of energy and never be able to reach that velocity . How is it that a photon ( a particle of light) which I believe does have mass, manage to screw up Einstein's equation and travel at 300,000 km/sec.?

2007-01-01 09:01:01 · 9 answers · asked by Anonymous

2007-01-01 08:59:55 · 7 answers · asked by neatuovi 1