Physics - May 2007

And if there is, what is the smallest known entity?

2007-05-05 12:19:33 · 10 answers · asked by Joel H 4

Electrons are negatively charged particles. How is it possible that they light a lightbulb or create a static shock?

2007-05-05 11:23:36 · 8 answers · asked by Danny 4

Even though I have looked up all of the terms and I know what they mean, it's just that all this math makes things seem meaning-less

2007-05-05 10:37:32 · 6 answers · asked by lord_andys_new_id 1

For simplicity sake, lets assume a mass equivalent to the earths mass, but the size of a basketball. Now lets assume the lever has no mass of its own, but it is perfectly rigid and will not bend no matter what. Now lets put the fulcrum at 1 meter from the mass we are lifting. And let us assume that the person at the end of the lever is pushing down with 100 kg worth of force. So how long is the lever? I would think it would be measured in light years.

2007-05-05 09:39:12 · 3 answers · asked by Phil H 2

... a solid sphere and a hollow sphere of the same mass and radius roll without slipping at the same linear speed. Which has more kinetic energy (solid or hollow) or are they the same?

2007-05-05 09:05:15 · 5 answers · asked by Greg 1

Can anyone explain in plain English the Heisenberg Uncertainty Principle?

2007-05-05 07:25:34 · 9 answers · asked by Anonymous

2007-05-05 07:18:36 · 7 answers · asked by CHRIS S 1

Sometimes when i drop a brick, It can lay their for a long time

2007-05-05 06:58:10 · 13 answers · asked by Anonymous

If you don't can you tell me the right one?

Motion is described with respect to a
a. graph b. displacement c. slope d. frame of reference
A:d

Displacement is distance combined with
a. direction b. speed c. velocity d. magnitude
A:a

Displacement vectors of 3 m and 5 m the same direction combine to make a displacement vector that is
a. average distance b. average acceleration c. total time d. slope
A:c

Average speed is the total distance divided by the
a. average distance b. average acceleration c. total time d. slope
A:c

The slope of a distance-time graph is equal to the
a. speed b.acceleration c. displacement d. motion
A:a

Velocity is
a. the slope of a linear graph b. acceleration divided by displacement c. speed with direction d. the same in all reference frames
A:c

Two or more velocities can be combined by
a. graphing the slope b. using vector addition c. calculating the instantaneous speed d. determining the rate
A:b

2007-05-05 06:56:33 · 2 answers · asked by Ryoma Echizen 3

Any websites that show free videos on how they constructed the atomic bomb or how they came up with it?

2007-05-05 06:51:08 · 1 answers · asked by Anonymous

I have a mental block with nuclear fusion. Encyclopedias and such like explain it in terms of a balance between the strong nuclear force and EM repulsion. I understand that the more nucleons in a nucleus the more Em repulsion strains against the strong nuclear force but I can't seem to pinpoint where the energy surplus derives from when hydrogen fuses into the heavier helium.

2007-05-05 05:22:05 · 3 answers · asked by Andrew H 2

it can't be bigger than one meter tall and one meter wide. it also has to fling the water ballon 30ft

2007-05-05 05:16:57 · 4 answers · asked by thisbudsforyou1989 1

2007-05-05 04:33:51 · 3 answers · asked by seal72TX 1

This is what i mean, august 1945 the first atomic bomb was created. It simply shot one peice of uranium into another. This would cause them to fuse and because radioactive elements tend to give off more neutrons they react better for an atom to split and cause energy to be released causing an explosion. My question is if you can get any two elements to crash into each other with that much force will it cause their atoms to split and have a chain reaction resulting in an explosion. ( maybe like two bullets shot at each other perfectly or something with that much force or more)

2007-05-05 04:21:44 · 3 answers · asked by Anonymous

I can also see sparks from static electricity (in the dark) when I brush my hair on an extremely dry day. What am I seeing?

2007-05-05 04:13:38 · 10 answers · asked by Anonymous

If a pinhole camera pointing vertically upwards is filled with a liquid and taken to an open space the image of the sky is found to be a circular disc of definite radius when the receiving screen is large enough . Explain this and deduce the refractive index of the liquid given that the perpendicular distance of the pinhole from the image is 10 cm and the radius of the image is 8 cm.(answer:1.6)

2007-05-05 04:06:07 · 1 answers · asked by kiyucheng 1

2007-05-05 03:37:10 · 2 answers · asked by Oo T 3

Hello. I'm a political scientist. I'm looking for an "easy" definition of entropy, in order to investigate it´s application in political matters, something similiar to"entropy for dummies". Thanks in advance!

2007-05-05 03:11:39 · 7 answers · asked by Mauri40 1

How does this relate to gravity if the earth and even the inside of creatures are expanding away from themselves along with the rest of the universe?

2007-05-05 02:45:03 · 6 answers · asked by U-98 6

What is the difference between
1) Internal Energy of an object and
2) Internal Energy of an ideal gas.

if possible, write the full def. for both.

2007-05-05 02:02:42 · 2 answers · asked by a 1

1. List some examples of water damage and how humans try to prevent damage.
Information: floods, avalanches and tsunami. And I also know how human try to prevent these damages.
I need more examples. Can you give me some more and also tell me how humans to prevent those?

2. Do any of the ways in which humans try to prevent damage caused by water create other problems? Select few examples and discuss.
Information: Humans try to prevent floods by building levees and dikes. I just know two.But I don't know how levees and dikes create problems. But I can tell you how peole build them. Here:
Levees, long walls of earth, are built along the banks parallel to a river. They are designed to keep the river contained during flooding.
Dikes protect land that has been reclaimed from the ocean. Poeple also bulid dikes around their houses and towns when a flood threatens.
Thats all I know. Except this, I need more examples and how they create problems.
Please help me!!!

2007-05-05 02:00:48 · 3 answers · asked by dkhgvusdygv 1

diffraction of light. how come the light pattern in so funny when light passed through i narrow single slit? white and dark fringe correspond each other? y?

2007-05-04 23:44:25 · 7 answers · asked by Anonymous

nothing!!

2007-05-04 23:16:38 · 4 answers · asked by Anonymous

1.If C is an observer and if A goes to the left with a speed close to the speed of light and B goes to the right with the same speed, doesn't that mean that A (for instance) would say that B goes faster than light? Is that possible?
2. Wouldn't C see them as going the same? ClockA and ClockB would be the same for C, but for A and B the same clocks would be different? How is that possible?

2007-05-04 23:11:41 · 2 answers · asked by Roxi 4

2007-05-04 21:13:00 · 4 answers · asked by neeraja s 1

Mass is directly proportional with how much gravity is available to effect other masses. So what if mass directly effects the fabric of space? Somewhat like the 3D of a ball between two tightly stretched sheets. Pressure on physical size now reacts just like gravity and mass. Same proportional math now?

2007-05-04 19:21:54 · 9 answers · asked by ldh2elsca 1

Whats lacking? A solid theory of gravitation or does it also have to do with the power required for such a bridge. I've also heard, it would need to be generated at the event horizon, but any mass would be crushed by that point.

2007-05-04 18:38:25 · 3 answers · asked by optik_0v3rd0se 2

2007-05-04 18:20:25 · 5 answers · asked by Anonymous

2007-05-04 18:20:11 · 8 answers · asked by deepak 1

2007-05-04 18:00:12 · 6 answers · asked by sujith s 1