Physics - September 2006

Come on, it can't just slow down, stop and fall back like a good ol' stone ! That would upend special relativity's apple cart. Just how would the light ray change ? The extreme situation would be when the massive star is a black hole.

2006-09-17 19:47:07 · 3 answers · asked by Problem Child 2

a truck is stopped at a stoplight. when the light turns green, it accelerates at 2.5m/s2. at the same instant, a car passes the truck goin 15m/s. where and when does the truck catch up with the car

2006-09-17 19:22:58 · 6 answers · asked by kewl_dave_us_05 2

2006-09-17 19:07:41 · 18 answers · asked by kewl_dave_us_05 2

its functions, applications

2006-09-17 18:53:54 · 1 answers · asked by ijuzluvseven 1

Please include formulas and remember (neglecting air resistance)

2006-09-17 18:51:44 · 5 answers · asked by Gordito 1

An astronaut of mass 100kg recedes from her spacecraft by activating a small propulsion unit attached to her back. I fthe force generated by a spurt is 25N, what acceleration will this produce?

2006-09-17 18:49:10 · 1 answers · asked by Gordito 1

2006-09-17 18:41:21 · 5 answers · asked by Lee B 1

why is it possible to focus clearly on objects underwater when ur eyes are underwater if u wear goggles with plane glasses in them , but not with naked eyes????????????

2006-09-17 18:40:51 · 5 answers · asked by me_ 3

2006-09-17 17:48:36 · 15 answers · asked by Bubbles 1

a rock is thrown straight up with an initial velocity of 20 m/s. (How high) does the ball rise when it reaches its ( Highest point)?

a = graivty = - 9.8 m/S^2 (that lil 2 ontop of the S) when objects are free falling

(How high) - pf = ?
(highest point) - vf= 0 m/s

2006-09-17 17:18:01 · 4 answers · asked by sub.lihhjj 2

(drop) - vi = 0 m/s

(How fast) - v = ?

plz set up and solve

2006-09-17 17:12:01 · 8 answers · asked by sub.lihhjj 2

drop is vi = 0 m/s

How far is pf=?

Set up and solve... plz help

2006-09-17 17:10:40 · 5 answers · asked by sub.lihhjj 2

(at) = vi

(stop) = vf= 0 m/s

set up and solve ... plz help

2006-09-17 17:08:02 · 3 answers · asked by sub.lihhjj 2

If you drop a ball from 6 miles in the sky (a bouncing ball), what will happen?

2006-09-17 17:02:22 · 9 answers · asked by c90 4

2a. Consider a hand holding a ball at rest. The ball weighs 10 N. The forces acting on the ball are its weight and the force of the hand on the ball. The forces acting on the hand are the weight of the hand and the force exerted by the ball on the hand.

How big is the reaction force associated with the weight of the ball? What object is responsible for that force?

How big is the force that the ball exerts on the hand? How big is the reaction force associated with this force?

Now let the hand exert a 15 N force on the ball.

How big is the reaction force associated with the weight of the ball? What object is responsible for that force?

How big is the force that the ball exerts on the hand? How big is the reaction force associated with this force?

2006-09-17 16:13:40 · 2 answers · asked by Anonymous

Determine the displacment of a plane that is uniformly accelerated form 66 m/s to 88 m/s in 12s.

2006-09-17 15:56:02 · 3 answers · asked by Falling Star 1

A 78g autographed baseball rolls off of a 1.1 m high table and strikes the floor a horizontal distance of 0.65 m away from the table.


The acceleration of gravity is 9.81 m/s(squared)


how fast was it rolling on the table before it fell off? Answer in unites of m/s

2006-09-17 15:41:22 · 2 answers · asked by baby_dee219 1

(1)a supersonic jet flying at 145 m/s is accelerated uniformly at the rate of 23.1 m/s^2 for 20.0s.

(2)the speed of sound in air is 331 m/s.

2006-09-17 15:27:18 · 7 answers · asked by Falling Star 1

I have read somewhere that light always moves relative to a traveller at the speed of light, but also that even if that traveller is moving the light beam will still be moving away from the traveller heading in the same direction at the speed of light. Is this correct and if so how is it possible? I would think that if a traveller is indeed heading in the same direction as a beam of light, at, say, half the speed of light, then the beam of light would be moving away from them only at a speed of half the speed of light. Anything more would mean that the light is travelling faster than the speed of light to a thrid party observer (which isn't possible). Can anyone clarify or did I read this fact wrong.

2006-09-17 15:25:22 · 9 answers · asked by midwestbruin 3

Physics laws for light only apply to light in a vacuum. So is light affected by friction? Light is energy right, not matter?

2006-09-17 14:57:53 · 7 answers · asked by Mada 2

I don't really need it for anything I just think that it would be cool to have. Also can anyone tell me what SI unit it uses.

2006-09-17 14:54:48 · 4 answers · asked by amish_renegade 4

what is the relation(in terms of direction) between weight of a body or gravity?in what direction does tension act?

2006-09-17 14:33:42 · 4 answers · asked by agni 1

I have suffered and am now dying!

I need to be able to:

Travel back in time.

Rewind my life including my age back to 4.

I am aware of two types of time travel one in physical form and the other in energy form where a snapshot of your brain is taken using either the dimensional warp or an electronic device and then sends your consciousness back through time to part with your younger self. Please explain how safe and what your method involves.
I have a time machine now, but it has limited abilitys and is useless without a vortex.
If you can provide information on how to create vortex generator or where I can get some of the blue glowing moon crystals this would also be helpful. I am however concerned with the high level of radiation these crystals give off, if you could provide a shielding or other crystals which give off a north polarized vortex field just as strong or strong enough to make a watch stop this would be great.
Please do not reply if your an evil alien

2006-09-17 14:17:33 · 7 answers · asked by Alex 3

Tell me everything you can about the dekasecond. Interesting things.

2006-09-17 14:14:55 · 5 answers · asked by BlackRose 1

A car is moving down a street at 55 km/h. a child suddenly runs into the street. If it takes the driver 0.75 s to react and apply the breaks.

2006-09-17 14:13:45 · 2 answers · asked by Falling Star 1

2006-09-17 13:30:53 · 4 answers · asked by Anonymous

I think that's the right spelling, lepton

2006-09-17 13:30:09 · 4 answers · asked by Edward J 1

I watch alot of science programs on the Discovery channel, and I've notice alot that the scientist on these programs won't really explain how they came up with thier conclusions. For example, I was watching a episode about alternate universes, and they explained that membranes from two universes collided which created the big bang. But they never explained what the membrane was. They never gave any information on how they came to the conclusion that there is more than one universe other than "It fits into thier mathmatical equations" and so forth. Now, I'm a diehard atheist who believes in science, but it seems here lately, at least on T.V. that the scientist want us to acept thier conclusion based on faith (faith in them.) Isn't there some laymens way to just explain these things so people who don't study physics can understand it?

2006-09-17 12:59:59 · 20 answers · asked by jedi1josh 5

Too much oxygen will NOT blow the candle out

2006-09-17 12:43:07 · 10 answers · asked by Mickey 1

2006-09-17 12:34:21 · 16 answers · asked by Eduardo V 1