Physics - July 2007

2007-07-04 21:52:31 · 6 answers · asked by Anonymous

2007-07-04 21:48:32 · 3 answers · asked by iamvasav 2

please explain:

power & wind resistance

friction & wind resistance

friction & aerodynamics

2007-07-04 21:26:58 · 4 answers · asked by ari 1

please explain the relation and what they mean.
how is it created?
where is it created?
etc....

2007-07-04 21:25:19 · 2 answers · asked by ari 1

this is related to metals used in medical field , i just want to know how to find the electron density of a metal or alloy if its density or chemical composition is known

2007-07-04 21:20:55 · 1 answers · asked by sanntovaz 3

A stationary 0.1-g fly encounters the windshield of a 1400-kg automobile traveling at 120 km/h. (a) What is the magnitude of change in momentum of the car due to the fly? (b) What is the magnitude of change of momentum of the fly due to the car? (c) Approximately how many flies does it take to reduce the car's speed by 1 km/h?

For a), I got that

0.1g/1000g=0.0001kg

0.0001kg*120km/hr=0.12kg*km/hr

But I don't know how to get b and c...

2007-07-04 18:54:11 · 2 answers · asked by Anonymous

2007-07-04 18:24:55 · 3 answers · asked by kraz 2

2007-07-04 18:22:01 · 4 answers · asked by kraz 2

A cat dozes on a stationary merry-go-round, at a radius of 5.0 m from the center of the ride. Then the operator turns on the ride and brings it up to its proper turning rate of one complete rotation every 6.2 s. What is the least coefficient of static friction between the cat and the merry-go-round that will allow the cat to stay in place, without sliding?

2007-07-04 15:32:31 · 5 answers · asked by xstrychnine 1

2007-07-04 15:28:57 · 7 answers · asked by Graciela, RIRS 6

Very down and lonely maybe cause l am 50 l dont know maybe lots of things .

2007-07-04 13:12:31 · 13 answers · asked by pirateron 5

2007-07-04 11:44:06 · 6 answers · asked by ZB 2

I have been exercising and eating better and my muscles have not increased whatsoever.. yet now I can see my ribs and before I was flabby.. and yet my weight is STILL 125lbs!! Has NOT changed. Do you think there is some "dark matter" in me? And how do I get rid of it seeing that it does not interact with anything, including itself?

2007-07-04 11:39:11 · 5 answers · asked by stacy_8888 1

and how many decibels it is at that boundary?

What's the formula

Does anything special happen at the supersonic-sonic boundary (reduced damage capability maybe?)

2007-07-04 09:40:52 · 2 answers · asked by anonymous 4

Does not the string theory and others like it incorporate several dimensions to explain their exsistence?

2007-07-04 09:29:06 · 11 answers · asked by PT109 1

http://www.siliconrepublic.com/news/news.nv?storyid=single8713

Please read ALL the article before posting an answer. For those who believe that the thermodynamique law on energy preservation works for everything, READ the steorn.com website informations before saying its not possible. Actually the will start a live feed on 4 webcams tonight showing the system in action.
This discovery can be compared to when humans first harness fire, this could revolutionized our society and the world if politicians and oil companies (corporations in general) step out of the way to make it happen...

2007-07-04 09:20:12 · 9 answers · asked by Jedi squirrels 5

me and a friend are having a debate in our physics class as to whether or not grass would turn blue when an appropriate speed is reached due to the doppler effect. we worked out the mathematical point at which this would occur (cant remember exact number right now, but practically speaking the speed is beyond anything currently possible). but if this speed was attainable would grass appear to turn blue?....

2007-07-04 09:10:13 · 7 answers · asked by Davo C 2

2007-07-04 07:27:46 · 4 answers · asked by Aaron J 1

e.g. if there is a tower we can see it with both eyes independently i.e.image formation in one eye is independent of other.So with both the eyes opened why do we get to see only one tower and not two one for each eye

2007-07-04 07:14:30 · 10 answers · asked by FIROZ H 2

2007-07-04 06:24:17 · 2 answers · asked by Anonymous

2007-07-04 05:26:27 · 11 answers · asked by Satwik P 1

2007-07-04 04:52:01 · 5 answers · asked by dostlew 1

Would it be correct to say Voltage of a circuit increases the ease of getting shocked and amperage increases the amount of electricity that would flow through you?

2007-07-04 04:31:03 · 3 answers · asked by Anonymous

An explosion occurs at the end of a pier. The sound reaches the other end of the pier by traveling through three media: air, fresh water, and a slender metal handrail. The speeds of sound in air, water and the handrail are 343, 1482, and 5040 m/s, respectively. the sound travels a distance of 125 m in each medium.
(a) Through which medium does the sound arrive first, second, and third?
(b) After the first sound arrives, how much later do the secnd and third sounds arrive?

2007-07-04 04:23:32 · 6 answers · asked by lub1210 1

2007-07-04 04:12:31 · 1 answers · asked by winter_new_hampshire 4

As what I learn, used electricity is disposed away through neutral wire, but where the neutral wire go? Is it goes into earth? Then its function should be same with the earth wire, isn't it?

2007-07-04 03:55:56 · 5 answers · asked by Lai Yu Zeng 4

I used to think it is slowing down, but I found out it isn't! How could it be accelerating if gravity is there to pull it together?

2007-07-04 03:52:41 · 4 answers · asked by worried person 1

2007-07-04 03:31:07 · 1 answers · asked by welma 2

We know that there is a limit to speed (the speed of light) but surely ther must be some limit to acceleration as well.

2007-07-04 00:50:29 · 11 answers · asked by John S2005 3

2007-07-04 00:07:31 · 10 answers · asked by Anonymous