Physics - November 2007

Why momentum is conserved in nuclear reaction?

2007-11-03 04:06:05 · 4 answers · asked by ice i 1

I had read this question on a quiz on my morning paper, but i wasnt able to follow-up the answer the next morning. could someone answers this, please?

Heres the question:

Is a sailboat being pulled off or being pushed by the wind?

2007-11-03 04:01:38 · 3 answers · asked by Prett 1

Recently, the first Malaysian Astronaut has conducted an experiment on which a spinning top will keep spinning in the space station...

I am kinda curious on this experiment..
My question is, Since there is air inside the space station, there should be air resistance acting on the top, right?? so, the top should stop moving after a while, isn't it??
If the top keeps spinning due to MICROGRAVITY, how?? Please explain why a top will keep spinning and even picks up speed on its own under microgravity condition... in brief, how does microgravity influence the non stop motion of the spinning top??

Thank you

2007-11-03 03:39:08 · 2 answers · asked by Fiddley 1

At the surface of a freshwater lake the air pressure is 1.1 atm. At what depth under water in the lake is the water pressure 4.5 atm?
m

2007-11-03 03:34:02 · 2 answers · asked by sportzblock 1

2007-11-03 03:11:17 · 3 answers · asked by Umang G 1

Please explain well.

-extended thanks =)

2007-11-03 03:08:07 · 4 answers · asked by Anonymous

2. A positively charged rod is brought close to a neutral piece of paper, which it attracts. Draw a diagram showing the separation of charge and explain why attraction occurs.

2007-11-03 03:05:50 · 1 answers · asked by sunday 1

I'm sure that there's a scientific explanation for ghost sitings and that it's not supernatural. I think that they are holograms from a civilization sent out millions of years ago using some kind of device that projects photons at the speed of light!

2007-11-03 02:52:56 · 9 answers · asked by Anonymous

And please state two instances when water may become a conductor of electricity.

-Please elaborate well.

-Extended thanks =)

2007-11-03 02:01:10 · 6 answers · asked by mjmg 1

What does these mean? All of them correspond to the 4 basic laws of thermodynamics and I'm not quite sure of their meanings.

Zeroth Law: You have to play the game
First Law: You can’t win
Second Law: You can’t break even, except on a very cold day   
Third Law: It doesn’t get that cold.

I need answers. Thanks a bunch!
  

2007-11-03 01:17:22 · 3 answers · asked by beachball_boink 1

2007-11-03 00:32:23 · 5 answers · asked by waseem M 1

thermodynamics

2007-11-03 00:24:12 · 3 answers · asked by z A h J 1

mechanics

2007-11-03 00:22:37 · 12 answers · asked by z A h J 1

2007-11-03 00:15:10 · 13 answers · asked by vijay p 1

2007-11-03 00:14:51 · 3 answers · asked by z A h J 1

It is just an investigatory project and I want to know about this..

Please help me...thanks!

2007-11-03 00:02:51 · 9 answers · asked by She C 1

When a nuclear reaction energy is released due to the converstion of matter to energy but how

2007-11-02 23:04:50 · 4 answers · asked by Anonymous

potential engery, kneitc energy....stuff like that....

2007-11-02 22:55:44 · 10 answers · asked by Anonymous

2007-11-02 21:43:12 · 15 answers · asked by forrestfyre 2

Materials given:wooden cylinders of diffirent diameters.You MUST CONTAIN.
1)Research question
2)Hypothesis
3)Variables
4)Materials
5)Procedure

2007-11-02 21:25:00 · 2 answers · asked by aforte 1

a long chain is lying on the ground . it is coiled but not entangled. now if one end of the chain is connected to a moving object (say train) . the chain is going to acquire a velocity . when this happen does it involve any heat release...? what if a rope is in place of chain. my fren tells me that when the links collide with each other ina chain and end up acquiring heat energy as in inelastic collision.
i differ. whats ur opinion..?

2007-11-02 21:16:31 · 3 answers · asked by mikel 2

what do i have to say about the origin of bremsstrahlung and the parameters affecting it ?

2007-11-02 21:08:50 · 2 answers · asked by Anonymous

Two singnals hav the same frequencies. However, whenever the first signal is at its maximum amplitude, the second signal has amplitude of zero. What is the phase shift between the two signals?

2007-11-02 21:06:56 · 4 answers · asked by Anonymous

A 200-liter tank initially full of water develops a leak at the bottom. Given that 20% of the water leaks out in the first 5 minutes, find the amount of water leeft in the tank t minutes after leak develops if the water drains off at a rate proportional to amount of water present.

2007-11-02 20:55:39 · 2 answers · asked by Sony55311 1

Given the vector V = (3.80i) + (5.40j) + (-7.00k), calculate the angle between V and the positive x, y, and z axes. Your answers should be in degrees and may be greater than 90.

Wow...how can physics do this to me...In the book it explains how to do it with only the x and y coordinates but it also gave a force and distance vector and to find the angle between the two forces = inverse cos (W/delta-distance).

There are no examples like this in the book nor in the questions...I have no clue how to do this if it has 3 axis and no force or distance vector stated. please help....

2007-11-02 20:46:04 · 2 answers · asked by Anonymous

Assume they were forced to collide

2007-11-02 20:22:10 · 7 answers · asked by worried person 1

give some expamples please

2007-11-02 19:03:26 · 7 answers · asked by giggs 1

1.0 M c2h5oh or 1.0 m c5h12?

2007-11-02 18:57:47 · 3 answers · asked by frenchies 2

why is that?

2007-11-02 18:56:29 · 2 answers · asked by frenchies 2

(if you could help me answer even one,..)

1. The primary coil of a transformer makes 240 turns around the iron core, and the secondary coil of that transformer makes 80 turns. If the primary voltage is 120 V, why will the secondary voltage be only 40 V?

2. Why does a magnet stick to the surface of a refrigerator?

3. When you have the magnetic strip on an ID or credit card read, it's always done by moving the card past a playback head. Why must the card be moving for the head to read it?

4. partscoretotalsubmissions1--100/1What does exposing the magnetic strip of an ID or credit card to a strong magnetic field do to that strip that makes it unreadable?

thank you in advance

2007-11-02 18:51:43 · 2 answers · asked by smile_swj 1