Physics - August 2007

I think it may involve a certian type of dimensional traveling partical but I am not very sure.

2007-08-21 12:03:43 · 11 answers · asked by The Doctor 2

a) two-thirds empty
b) one-half empty
c) one-half full
d) two-thirds full

2007-08-21 11:48:38 · 13 answers · asked by Alexander 6

If nothing is really eternal, and matter was created, then how can the law of conservation of matter hold? I mean, I've heard it was created AFTER the big bang, which confuses me even more. What was before the first big bang? I am a Lutheran Christian, and I am dogmatic too. But I am always curious as to what the latest theory is. The modified, 'multiple big bang' theory intrigued me, but I never got a solid answer for the matter thing. Thanks.

2007-08-21 10:42:47 · 4 answers · asked by thepbass 2

2007-08-21 10:37:15 · 1 answers · asked by ? 3

how do hitting a golf ball in the moon differ from hitting a golf ball on the earth?

2007-08-21 10:18:24 · 13 answers · asked by Dan 2

with the ground. what is the x component of the force he exerts?

2007-08-21 10:13:38 · 2 answers · asked by Anonymous

1. One advantages of optical fibres over ordinary cables of the same thickness is?

a) They are made of glass.
b) They can carry more information.
c) Their signals weaken more over long distances.

2. How do signals travel through optical fibres?

a) As microwaves
b) As radio waves
c) As infrared radiation

3. A signal that varies continuously in frequency is called?

a) A digital signal
b) An analogue signal
c) An AM signal

4) How many different states are there in a digital signal?

a) One
b) Two
c) Three

5. Which type of signal maintains its quality the best?

a) Digital signals
b) Analogue signals
c) Both types are the same

Do as much as you know and if you could EXPLAIN in that will really help Cheers!

2007-08-21 09:57:49 · 4 answers · asked by Anonymous

Special Relativity tells us that we can't go light speed. But speed can only be measured in relation another reference frame. Since there's no absolute speed what reference frame do we measure speed against to know if wer're approaching light speed?

I hope that makes sense.

2007-08-21 09:07:01 · 8 answers · asked by Anonymous

It is found that a particular system obeys the relations
U = PV and P = BT2
where B is constant.
Find the fundamental equation of the system.

2007-08-21 09:04:33 · 1 answers · asked by g2hn 3

In Einstein's theory of relativity, he talks about gravity bending space so that objects are pulled towards other massive objects.

If a force like gravity "bends" space, then would it be likely that a force like electrical charge would also "bend" space? After all, they are both "forces" and they both work on other objects at distance. They also both have strengths related to the inverse of the distance from the object creating the force.

However, an electric charge doesn't effect everything around it in the same way that gravity does. The electric charge only attracts or repels other charged objects. So, how could the electric force be bending space? Could it just be "bending" space for some objects but not others?

It seems like, in my opinion, that if you want to be able to find a link between the two forces, you would need to get rid of the "bending of space" idea. Have people working on the "Grand Unified Theory" come up with any ideas on this subject?

2007-08-21 08:33:02 · 3 answers · asked by Azure Z 6

Some one claimed that physicists where claiming a connection with metaphysics. Is there any truth in that whatsoever? If so, how would they relate?

2007-08-21 08:17:58 · 3 answers · asked by hb12 7

In 5 weeks I've used about 11,491m3 of gas - what would this work out in kWh?

Obv I can wait for my first bill but would just like a rough idea of what I'm looking to pay each month.

Thanks a mil.

2007-08-21 08:11:38 · 5 answers · asked by lausie 2

2007-08-21 08:10:19 · 2 answers · asked by Anonymous 1

I can watch the temp rise as soon as the sun goes down. After it gets cooler outside (under 72) I open some windows (one with a fan in it) on opposite sides/ends of the house and make sure the outflow is slightly larger than the inflow so I don't create a backpressure situation. It can be 60 outside and even with the fan on all night I still can't get the house under 70 degrees.

The house faces the West so I know it is getting baked.

Any options to cool it faster? I have a big fan and use it on high. Why does it get hotter once the sun gets off it?

2007-08-21 07:47:22 · 9 answers · asked by Anonymous

Initally the brick is spinning around the shortest axis, and its kinetic energy is Ko = 1Joule.

How much work must the ant perform to realign the axis of rotation along the longest axis of the brick?

2007-08-21 07:44:06 · 3 answers · asked by Alexander 6

The speed of light is about 3.0 108 m/s. Express the speed of light in terms of astronomical units per minute?

2007-08-21 07:35:53 · 7 answers · asked by Wonder 2

what is the length of the fiber?

2007-08-21 07:22:44 · 2 answers · asked by Wonder 2

2007-08-21 07:05:47 · 5 answers · asked by Anonymous

2007-08-21 07:02:05 · 10 answers · asked by Anonymous

At what height above the earth would a 4000 kg weather satellite have to orbit in order to experience a graviational force half as strong as that on the surface of the earth?

2007-08-21 06:47:31 · 1 answers · asked by Anonymous

Help Pls!!! About Projectile Motion.?
1.) How the horizontal component of velocity of a projectile does vary with time?

2.) How the vertical component of velocity of a projectile does vary with time?

3.) How does the initial velocity of a ball from the edge of the table change with the point of release on the invlined plane?

Plz!!! Help!!

2007-08-21 06:04:54 · 7 answers · asked by Anonymous

2007-08-21 05:54:29 · 6 answers · asked by kb1990 1

The conflict between Science and Religion is really just one question that has been globally left unanswered.

Does CONSCIOUSNESS arise from the PHYSICAL UNIVERSE, or does the PHYSICAL UNIVERSE arise from CONSCIOUSNESS?

If you take the position that the PHYSICAL UNIVERSE arises from CONSCIOUSNESS, then you believe in a GOD or SPIRITUAL SOURCE!

If you take the position that CONSCIOUSNESS arises from the PHYSICAL UNIVERSE, then you believe that everything in the PHYSICAL UNIVERSE is an accident, including your thoughts on the matter right now, and all previous thoughts!

The first position basically says that you have a real awareness and will (mind) capable of deciding your own life. The second does NOT!

If the second position is true, then anything you say here has no REASON for being said.

Any thoughts on this? ;)

2007-08-21 05:52:41 · 10 answers · asked by DW 2

2007-08-21 05:47:33 · 2 answers · asked by MANDY 1

i mean it sounds far fetched buy could it be possble that there is more then one universe and could one of those universe be black hole free?

2007-08-21 05:39:10 · 16 answers · asked by Anonymous

2007-08-21 04:56:22 · 5 answers · asked by Alexander 6

What if the whole point of our existence is to expedite the acceleration of the converging of the universe to a single point?

If gravity pulls everything into a point in space, then the intelligence of the universe would have as its goal the convergence of all matter. Perhaps we are one of the vehicles that accelerate this convergence by our own manipulation of substance. We create products out of the raw material around us. We alter its form, its density, and its combinations. What if we are the advanced form of this substance learning how to manipulate substance so we can, so far unconsciously, expedite the acceleration project?

Any thoughts on the matter?

Please, no "nobody knows the answer" idiots. These kind of people are just waisting everyone's time, and have completely missed the boat on what the Yahoo Answers forum is all about.

2007-08-21 04:39:14 · 5 answers · asked by DW 2

http://news.yahoo.com/s/livescience/20070820/sc_livescience/timetravelmachineoutlined

I find it very interesting and intriguing....just wish I understood what the hell they were talking about!

2007-08-21 04:31:05 · 8 answers · asked by Anonymous

Two boys standing on a bridge each throw a rock straight down into the river below. They throw the rocks at the same instant but one rock hits the water before the other. How can that happen since the acceleration (due to gravity) is the same in both cases?

2007-08-21 04:06:02 · 5 answers · asked by clars 1

1.) Find the momentum of a 50-g bullet whose KE is 250 J
2.) Find the momentum of a giraffe galloping at 20km/h whose KE is 6.0kJ
3.) Find the momentum of a 3200-lb car moving at 3-mi/h
4.) Find the momentum of a 0.40-lb bullet whose KE is 1600-ft x(times) lb
5.)Car A has a mass of 1000kg and is moving at 30km/h. Car B has a mass of 2000kg and is moving at 30km/h. Compare the KE and momenta of the two cars.
6.) A 1000kg car strikes a tree at 30km/h and comes to a stop in 0.15 s. Find its initial momentum and the average force on the car while it is beong stopped.
7.) A 160,000kg DC-8 airplane is flying at 870km/h.(a)Find its momentum.(b)If the thrust its engines develop 340kN, how much is needed for the airplane to reach this speed starting from rest? Neglect air resistance, changes in altitude, and fule consumed
8.)A 1/3lb baseball reaches a batter with a speed of 75ft/s. After it has been strucked, it leaves the bat at 100ft/s in op. direction. ball to bat=1.0 ms. find the ave. force

2007-08-21 03:42:18 · 1 answers · asked by squall_cloud 1