Physics - January 2007

eqaitions

2007-01-04 22:50:39 · 1 answers · asked by Anonymous

Physics tells us that time is relative and mathematically you could move backwards and forwards in time since you could substitute 't' by '-t' and all equations of Physics would be equally valid (including all the gravitational equations, the equations of quantum mechanics and thermodynamics). Then why does it appear to us that time moves forward, why do we age and why do we die?. (Einstein called this the most stubborn illusion).

2007-01-04 22:19:13 · 7 answers · asked by wintersun 1

if it is theoritically proved find me it's applications in today's life.

2007-01-04 22:12:28 · 8 answers · asked by thirunavukkarasu u 1

2007-01-04 21:59:07 · 5 answers · asked by GUNA S 1

Ca anyone tell me whether anti-neutrinos all have lepton number of -1?


Furthermore could anyone explain why a pi0 decays into two virtual photons?

Thank you :D

2007-01-04 21:48:42 · 2 answers · asked by Belle 3

A 90kg person stands 0.5m from a 60kg person sitting on a bench nearby. What is the magnitude of the gravitational force that the 90kg person exerts on the 60kg person?

The answer is 1.44*10^-6N. I need to know which formula to use.

2007-01-04 21:34:22 · 2 answers · asked by Some Guy 2

2007-01-04 21:25:03 · 7 answers · asked by Anonymous

my son have project in science that is working model rocket. Any body help me how to do it

2007-01-04 21:18:15 · 2 answers · asked by Anonymous

i need it for our physics subject. please help me.

i really appreciate if you add some imformations that can help me regarding optical illusions. thanks!

2007-01-04 21:16:58 · 3 answers · asked by boom boom 1

i know that they have something to do with time travel,but what are they actually?do they exist?

2007-01-04 21:14:07 · 3 answers · asked by creed 1

What qualities do peanuts have that make them have enough energy to heat up water? (If you can include a resource/ website of some sort it will be GREATLY appreciated)

2007-01-04 20:41:06 · 2 answers · asked by Anonymous

Because isnt that basicaly what we have done to the earth with power generation? Also I would like to know what happens when you run the same with a much much larger DC battery fairly close to the same system. Cause that would be kinda like the earth and sun relationship...

2007-01-04 19:21:37 · 2 answers · asked by magpiesmn 6

The only variable was the payload I placed on the rockets. Both water rockets had the same psi, same water level, etc.
Why does the rocket with a greater payload hit the ground earlier than the one wit ha lighter payload? Doesn't everything fall at the same speed/acceleration?

2007-01-04 19:03:07 · 3 answers · asked by The Riddler 3

Im looking for a physical science explanation... The way a person can be healed through laying of hands of other people to him. or the way david blane were able to survive under water for almost a week because of the transfer of energies of other people surrounding him.

How does it work?

2007-01-04 18:33:55 · 3 answers · asked by Anonymous

MCQ:
Left side of the physical balance you put "1 kg weight"
Right side of the physical balance you put "1000 g cotton"

a) both are equal
b) Left side heaveir
c) Right side heaveir
d) None of above

2007-01-04 17:57:46 · 6 answers · asked by imran n 3

2007-01-04 17:45:23 · 12 answers · asked by 8N 1

A small rubber ball is attached to a string. A student swings the ball around her head at a steady speed. What happyans to the speed of the ball if the length of the string is shortened??Explain your answer.

2007-01-04 17:42:58 · 5 answers · asked by Sapan P 1

I don't mean 9.8 metres squared--I mean, if you could somehow make an object appear out of NOTHING--how long would it take for it's gravity to affect the objects around it?

2007-01-04 17:40:23 · 10 answers · asked by kejjer 5

Since accelerating to the speed of light would take infinate energy, and even if a source could gather all the energy in the universe and control it, the object would reach infinate mass right? Something with infinate mass would do what? Destroy whatever was left of the universe that wasn't used to bring the object tolightspeed with it's gravity?

2007-01-04 17:38:17 · 10 answers · asked by Matt ! 3

2007-01-04 16:56:23 · 3 answers · asked by Anonymous

I am thinking of getting a generator but this is confusing

2007-01-04 16:45:52 · 7 answers · asked by jerm 1

If I am standing on a flat bed truck heading East going 50 mph and (while standing on the truck) throw a ball 50 mph towards the West (opposite direction), what is the speed of the ball at the point of release if the speed is being calculated from a stationary position on the ground? Won't they cancel each other out and the ball just simply hover for a second and drop to the ground?

2007-01-04 16:42:54 · 4 answers · asked by Mr. T 1

Can you please give me a page fescription about Frictional Force?

Also tell me the best web site to search for info..(except google, yahoo)

2007-01-04 16:38:10 · 2 answers · asked by Anonymous

2007-01-04 16:13:24 · 6 answers · asked by Mike 1

2007-01-04 15:53:06 · 4 answers · asked by Eng.Ma7mood 1

2007-01-04 15:49:18 · 4 answers · asked by Sapan P 1

I am currently taking AP Physics and AP Calculus. So far AP Physics B(without calculus) is easy I have an A. However AP Calculus AB I have a B in there. Is physics with calculus in college a combination of the two, say using integrals from calculus and momentum from physics or something similar?

2007-01-04 15:47:40 · 1 answers · asked by avalentin911 2

2007-01-04 15:46:08 · 3 answers · asked by Sapan P 1

I need to know how torque changes throughout one full 360 degree rotation of the armature/shaft of a DC motor. (Torque vs. Angle Position)

2007-01-04 15:40:06 · 2 answers · asked by zburritoman 1

2007-01-04 15:19:28 · 4 answers · asked by Sapan P 1