Physics - September 2006

how does a streamlined design improve fuel economy?
engine

2006-09-25 02:53:33 · 5 answers · asked by Anonymous

2006-09-25 02:11:43 · 1 answers · asked by Carol F 1

i hardly get ne of this but im really interested .so please help me

2006-09-25 02:01:43 · 4 answers · asked by rockinsaint 2

I am writing an essay in Physics, about my day without friction. I am finding it really hard. Could someone give me some ideas? Because surely without friction there would be nothing!!!

2006-09-25 01:56:55 · 4 answers · asked by lilmisshappy 1

2006-09-25 01:30:17 · 10 answers · asked by vijay reddy 1

i e, using the polarised gravity can propel spaceships in a cense that we will be using only one factor of the gravity

2006-09-25 00:59:18 · 2 answers · asked by renil 1

what do you think?

2006-09-24 22:33:40 · 7 answers · asked by morroniac 2

what happened to the salt??

2006-09-24 21:51:36 · 8 answers · asked by Anonymous

2006-09-24 21:34:35 · 9 answers · asked by TC 1

2006-09-24 21:24:29 · 6 answers · asked by Anonymous

2006-09-24 21:09:29 · 6 answers · asked by mr.brain 1

2006-09-24 21:03:30 · 15 answers · asked by johnboy 4

the formula for centripetal that i have learn is a=v^2/r...if i derive the the motion formula..v^2=u^2+2as...where a is acceleration and s is displacement ..i get the centripetal force is...a=v^2/2r.........where the 1/2 go?

2006-09-24 20:42:21 · 4 answers · asked by pouli 2

Trying to show my 11 yr. old daughter how they work...We can't seem to find any examples ....anybody have a clue where to find deminnsions???

2006-09-24 20:31:27 · 1 answers · asked by budlowsbro420 4

2006-09-24 20:23:48 · 4 answers · asked by tom science 4

If i throw a stone(say 1kg) with the angle of(say 60 degree),then the stone goes in projectile motion and finally reach the ground(say 10m from the beginning),then how much POWER did i use in that throwing? What formulea should i use to calculate it?

Anyone~~~???

Thanks,....!!

2006-09-24 20:21:13 · 4 answers · asked by Toby T 1

Can someone exlain it to me using the principal quantum number (n), quantum number (l), magnetic quantum number (m) spin quantum number (s) in a sensible and visual way?

2006-09-24 18:43:42 · 2 answers · asked by ibid 3

one of the earliest high quality mic. was d capasitor mic. consisting of a flat circular disk of metal foil separated by a thin insulating washer around its periphery from a flat conducting sheet. the foil and plate form a capasitor. the plate is grounded and the foil is raised to a potential V through a resistor. if the resistor is 10x10^6 ohm and if the foil diameter is 75mm, its separation from the plate 1mm, potential 100V, what rms voltage change when 500Hz vibrates the foil through a total amplitude of 40micrometer at its midpoint. assume that the midpoint amplitude of the foil is twice the average displacement across the entire foil surface.

2006-09-24 18:30:39 · 1 answers · asked by tidanni 1

2006-09-24 17:35:25 · 13 answers · asked by Bright Eyes 4

2006-09-24 17:21:13 · 8 answers · asked by crowhursta 1

the monitor of computer or TV screen has got three lights then how we see all the lights can it mean these are the only main lights while others are their derivatives or combinations?? How different wave lengths are combined??

2006-09-24 17:12:37 · 7 answers · asked by kangkan p 1

I have recently reread "A Brief History of Time" by Stephen Hawking and in the book, he states that quantum mechanics and relativity are contradictory to each other and therefore cannot both be correct. I realize that at present physics lacks a unified theory that incorporates both but in what ways are they contradictory to each other? And if they cannot both be correct, how is it that we are able to make incredibly accurate predictions using both? Does it have to do with the presence or lack of singularities within the Universe?
Thanks in advance.

2006-09-24 16:59:54 · 5 answers · asked by Anonymous

1. what is semiconductors

2. why metals are good conductors of electricity while semiconductors have relatively poor conductivity?

3.why plastic deformation(eg. cold rolling) and alloying (eg. in stainless steel) affect the electrical resistivity of metals?

4. what is the difference between intrinsic and extrinsic semiconductor?

5.what is the role of doping in the electrical conductivity of semiconductors

6.what's the difference between n-type and p-type semiconductor?

7.what cause the different resistivity values of metals?

8.why semiconductor possess different electrical resistivity?what is the most dominating factor?

2006-09-24 16:54:23 · 4 answers · asked by lkamh 2

2006-09-24 16:38:50 · 4 answers · asked by nanajmee 1

there is plenty of evidence that space itself ( the universe ) is expanding. if so, shouldnt it mean that matter ( the atoms themselves ) are expanding in size ( as they exist within the fabric of space ) ? please post your thoughts ( i would prefer professionals only )

if matter also expands, then why does the distance between objects increase ? if only the distance increase, then doesnt matter occupy a position "independent" to space ( instead of existing within it [ as it is believed ] ?

i believe the key to understanding this paradox is the next step in theoretical physics.

2006-09-24 16:19:45 · 11 answers · asked by fullbony 4

The takeoff speed of a jetliner is 360 km/h. If the jetliner is to take off from a 2100 m long runway, what must be the (constant) acceleration along the runway?

2006-09-24 15:45:00 · 1 answers · asked by Olivia 4

When you boil potatoes, will your cooking time be redued if the water is vigorously boiling instead of gently boiling?

2006-09-24 15:27:01 · 11 answers · asked by mussinasmeg 1

is the projection angle?

2006-09-24 15:15:29 · 4 answers · asked by cheerfulbeaches 1

2006-09-24 14:59:27 · 7 answers · asked by Anonymous

Ok, so I realize that outer space is not "nothingness." It is full of radiation with a temperature of about 3 K. Since this radiation is shining on the earth at night, why does the earth get cold at night?

2006-09-24 14:55:57 · 11 answers · asked by mussinasmeg 1