Physics - November 2006

A child sleeping near a domestic an a.c power line is exposed to a magnetic field which may be dangerous. The Earths magnetic field strength is about the same as that of the power line but does not pose a hazard . Why

2006-11-06 01:44:29 · 5 answers · asked by tamburo 1

2006-11-06 01:37:15 · 7 answers · asked by Anonymous

American scales read in pounds, because pounds can be pounds force or pounds mass, but Kilograms are just mass, the unit of force is Neutons, which take into account the force of gravity.

2006-11-06 01:11:39 · 3 answers · asked by Fire Halo 3

2006-11-06 01:05:03 · 6 answers · asked by Baishikk 1

Xe-135, a secondary fission product, has a voracious appeitite for neutrons, and a civilian power reactor, once shut down, cannot be restarted until the xenon is sufficiently decayed. Such a delay would be unpleasant for any ship, and unacceptable for a warship. What methods are used to increase reactivity in naval nuclear propulsion to avoid this problem?

2006-11-06 00:59:13 · 5 answers · asked by Anonymous

Need more details.

2006-11-06 00:53:44 · 5 answers · asked by sridhar 1

2006-11-06 00:47:36 · 5 answers · asked by mae mae 1

2006-11-06 00:45:44 · 8 answers · asked by gaurav g 1

im in 11th grade and in physics class, i was absent for one day.. and i have an experiments thats due in 20 hours.. anyone have any ideas on what i can experiment on... doesnt have to be anything hard.. it can be something easy that can only take me like less then five or 4 hours.. one of my classmate is doing a experiment on pressure.. not really sure what.. butt... yeah.. it can be an experiment on rolling a ball or something.. pls help me and give me ideas

2006-11-06 00:31:09 · 1 answers · asked by mike s 2

The thickness of a soap bubble is only a few molecules. Also bubbles must be > 99% water. (say a cup of water with a few drops of washing up liquid)
However they can last for a couple of minutes. Water just a few molecules thick would eveporate in a just a few seconds. How come bubbles last that long?

2006-11-06 00:19:28 · 3 answers · asked by amania_r 7

2006-11-05 23:17:51 · 9 answers · asked by Anonymous

define newton's first law of motion and explain how it leads us to concept of inertia and definition of force?

2006-11-05 22:43:46 · 6 answers · asked by jibranmoeed 1

Every object in the universe attracts every other object in the universe (and the larger the object, the more attraction there is), but if there were particles that repelled every other particles in the universe, maybe we could search for them at the end of space (and time?).


My point is, why do objects attract each other? What is gravity? How does it exist? And if we understood this, then maybe we could "reverse" the polarity of the attraction, and make objects "naturally" repel each other? The problem is, the particles would just disappear into space....

Anyway, is it possible to reverse gravity, and make anti gravity devices? (apart from the cat and toast idea)

2006-11-05 22:43:43 · 10 answers · asked by sdunk23 1

I understand the difference between conduction, convection and radiation, and I understand the equations of radiation, but what I just don't undersand is how an object can be heated up by radiation when there is nothing physical moving from the heat source to the object.

If Einstein showed that energy is equivalent to mass, then when the object heats up, it gains energy, therefore the radiated source must have transmitted it through the vacuum. So what travelled through space, mass or energy, or both?

2006-11-05 22:30:51 · 5 answers · asked by sdunk23 1

a current of 0.8 A was passed through it and the voltage was measured it was 1.4 what is the resistance? formula and answer needed

2006-11-05 22:12:56 · 6 answers · asked by ██████████ 3

Can you help me find good infos about myopia based on physics? pls........ pls.......... pls..........

2006-11-05 21:55:02 · 1 answers · asked by Anonymous

if the data is more frequent than hourly, that is fine !
past two years would be okay.
Thankyou

2006-11-05 21:46:17 · 3 answers · asked by fred f 1

Okay, if we are energy, is it possible that when you think about something that thought is energy and can be manifested..?
I am just asking for a scientific answer, is it possible.

2006-11-05 21:39:39 · 2 answers · asked by *JC* 4

I watched a show on SBS (Aussie station) and it was about String theory.. Can anyone who is familiar with this theory or watched the show elaborate a little or know where i can find more information on this theory???

2006-11-05 21:30:34 · 5 answers · asked by *JC* 4

A short note on gravitational force

2006-11-05 19:25:06 · 15 answers · asked by Anonymous

at any give time t's position is given by f(t) = 4πt + sin(4πt)
1. find the velocity
2. find the acceleration
3. what are all of the values from 0 to 3 for which the particle is at rest?
4. what is the maximum velocity?

2006-11-05 19:17:19 · 3 answers · asked by gctoinfinity 1

A block of mass 12 kg slides from rest down a frictionless 35 deg incline and is stopped by a strong spring with a force constant of (3 * 10^4 N/m). The block slides 3m from rest against the spring. When the block comes to rest, how far has the spring been compressed?

Eep! How do I figure this out?

2006-11-05 18:21:23 · 2 answers · asked by AChung63 1

A block with a mass of 8 kg is held in equilibrium on an incline of angle = 30.0° by the horizontal force, F

Find the magnitude of F

Find the normal force exerted by the incline on the bloc

2006-11-05 17:49:29 · 6 answers · asked by J39P 1

A girl coasts down a hill on a sled, reaching level ground at the bottom with a speed of 7.0 m/s. The coefficient of kinetic friction between teh sled's runners and the hard, icy snow is 0.050, and the girl and sled together weigh 645 N. How far does the sled travel on the level ground before coming to rest?

2006-11-05 17:35:19 · 5 answers · asked by nick n 1

2006-11-05 16:54:19 · 3 answers · asked by gi_crunch 1

A rock is dropped from the top of a 45m tower and at the same time a ball is thrown from the top of the tower in a horizontal direction. Air resistance is negligible. The ball and the rock hit the level ground a distance of 30m apart. The horizontal velocity of the ball thrown was almost nearly....?
I know the answer is 10 m/s but why? Can someone explain how you get the answer?
thanks

2006-11-05 15:30:29 · 3 answers · asked by odonata 2

2006-11-05 15:07:56 · 5 answers · asked by Anonymous

what are the main purposes of the neutron?

2006-11-05 14:56:52 · 5 answers · asked by Anonymous

what are the dangers?

2006-11-05 14:53:44 · 5 answers · asked by jqdsilva 3

meters high. what is the initail vertical velocity of the ball. what is the approximate total time required for the ball to reach the groud. And what is the horizontal velocity of the ball just before it reaches the ground

2006-11-05 14:45:57 · 5 answers · asked by samuel s 1