Physics - May 2007

the energy of an electron is determined by its state,is there any way method to determine the absolute nature of energy in an electron i e free electron............(translational,vibrational,etc added together)

2007-05-07 01:51:50 · 3 answers · asked by Anonymous

i am very sure everyone is aware of newtons law action and reaction are equal but opposite in direction, so i have always found it very difficult to understand how does this work in space where there is nothing to act against. i.e you cannot swim in space and in one of the startrek episodes i saw they come accross a creature like whales that propell themselves as they are swiming, absurd!. But can anyone please solve this for me thankyou.
So back to the question how does jet propusion work in space.

2007-05-07 01:44:26 · 6 answers · asked by ayazali84 2

The longitudinal strain and laterial strain of a given wire are 25x10-6 and 5x10-6 resp.
The Poisson’s ratio is
1. 0.2
2. 5
3. 0.1
4. 0.3

2007-05-07 01:15:43 · 1 answers · asked by ajith k 1

1.1J/40
2.1J/80
3.1J/20
4. Can’t be determined

2007-05-07 00:57:25 · 7 answers · asked by ajith k 1

What's the advantage over using a variable resistor rather than a fixed one? Other than the obvious fact that you can change the resistance, especially in an experiment where you are investigating the effect of legnth of wire on resistance, where you measure current and voltage to work our resistance.

2007-05-06 22:41:52 · 6 answers · asked by mbchelsea 1

Is it true that you can have superhuman strength by doing this?

This guy moved 30 ton rocks to build his house by apparently pointing a rock that focuses where two magnetic energy lines intercept, at his location. This in effect gave him added strength.

Check it out:

http://www.maniacworld.com/Florida-Coral-Castle.html

I think it's certainly possible and have found no evidence against it.

An interesting side note:

It was also mentioned in the video that most of his other techniques were unknown, and went to the grave with him. He was to of said that he knew the secrets of how the pyramids were constructed.

Perhaps he used this technique?

http://digg.com/design/Amazing_Video_How_One_man_could_Build_Stonehenge

On his website this other guy mentions techniques of building the pyramids:

http://www.theforgottentechnology.com/newpage3

What do you think?

2007-05-06 21:08:30 · 5 answers · asked by kfjads k 1

2007-05-06 16:55:37 · 3 answers · asked by summertime 3

Water becomes steam at 100 celcius degrees and how this happens? I forgot all physics.

If you put some water on floor and after sometimes, it evaporates. how it happens? How can water evaporate at room temperature. Thanks!

2007-05-06 16:48:49 · 1 answers · asked by slperera 3

I know one of the answers is gravity but i don't know what the other is. Plz help!!!!!!!!!!!!!!!!

2007-05-06 16:48:13 · 1 answers · asked by summertime 3

Which of the following must be true if total internal reflecation is to occur?
I. The angle of incidence must be smaller than a certain maximum angle determined by the refractive indices of the two media
II. Light rays must travel from denser material to lighter one
III. The sine of the refracted angle must be less than one

2007-05-06 16:43:57 · 2 answers · asked by JitterBug589 3

Which diagram represents the net electric field between two charged parallel plates if a neutral conducting sphere is placed between the plates? (answers in the book say none of them)

http://img517.imageshack.us/img517/3172/img0436yq9.jpg

would appreciate a detailed explanation.

2007-05-06 16:43:40 · 1 answers · asked by fye 1

Constructive interference will maximize the amplitude of two waves of identical wavelength if they are offset by:
wavelength/4
wavelength/2
wavelenth/pi
wavelength/2pi
wavelength

2007-05-06 16:38:56 · 2 answers · asked by JitterBug589 3

A chair of mass 12kg is pushed along a level floor by a force that is at an angle of θ=35.0degrees below the horizontal. The coefficient of friction between the chair and the floor is µ=0.430. The power that the force provides to move the chair in a straight line at a constant speed of 3.8m/s is?

2007-05-06 16:01:51 · 3 answers · asked by ♡♥EM♡♥ 4

The human eye can respond to as little as 10-18 J of light energy. For a wavelength of 400 nm, how many photons lead to an observable flash?

I have no idea what to do.. >_<

2007-05-06 15:34:05 · 3 answers · asked by Anonymous

Settle an argument for me. if you ramp a car hauler going slightly faster than it is, your overall speed in respect to a stationary point is your orginal speed plus the speed of the new force acting on it right? not the difference of your speeds plus the speed of the hauler. We are just trying to get the more likely answer... and both arguments are understood to be in a vacuum, no wind resistance. perfect traction upon mounting the ramp, no increased engine load due to inclination of the ramp... just simple answers.

2007-05-06 14:26:15 · 6 answers · asked by geona g 1

ok please tell me what velocity, speed, and displacement is, and how you work them please? i have questions but i have no idea what they ask me, so i want to know please?

2007-05-06 12:37:51 · 4 answers · asked by TheDarkness 1

in cold weather and cooler in hot weather?

2007-05-06 12:37:35 · 5 answers · asked by Justin M 1

it return to the surface, stay at the depth to which it isd pushed or sink?

2007-05-06 12:33:31 · 4 answers · asked by Justin M 1

calculate the height of the water column in a water barometer, assuming an atmospheric pressure of 10 (raised to the 5 power) Pa.

what would be the final temperature when 100g of 25degC water is mixed with 75g of 40degC water?
CALUCLATIONS PLEASE!!!

2007-05-06 12:20:49 · 1 answers · asked by shynquiet 1

so does it become more brittle when put in a freezer or what?

2007-05-06 11:17:16 · 5 answers · asked by Brass Dog 2

1] the moon has a mass of 7.4 x 10^22 kg and completes an orbit of radius 3.8 x 10^8 m about every 28 days. The Earth has a mass of 6 x 10^24 kg and completes an orbit of radius 1.5 x 10^11 m every year. What is the speed of the moon in its orbit?

2] what is the kinetic energy of the moon in orbit?

3] what is the kinetic energy of the earth?

2007-05-06 11:10:34 · 1 answers · asked by Taylor 1

2007-05-06 11:06:35 · 6 answers · asked by Heyderguy 2

1-What happens when a reflected wave goes from thin to thick. What happens when it goes thick to thin?

2-What happens when the amplitude of a longitudinal wave increases ...what about when it decreases??

3-What happens when the frequency of a longitudinal wave increases...decreases?

2007-05-06 10:49:21 · 1 answers · asked by Jane A 3

If a woman who has been pushing a box to accelerate it, suddenly stops applying a horizontal force to the box, then the box will: increase its speed for a while and then start slowing to a stop, continue at a constant speed, continue moving at a constant speed for a while and then slow to a stop, immediately start slowing to a stop, immediately come to a stop.

Since the force would become negative, but the mass would stay the same, I thought that the car would immediately start slowing to a stop, but that is not the correct answer.

Any ideas?

2007-05-06 10:43:55 · 5 answers · asked by Anonymous

1. The equation of motion of a simple harmonic oscillator is d^2 x/d t^2= -9x, where x is displacement and t is time. The period of oscillation is...?

2.A pendelum with a period of 1 s on Earth, where the accelaration due to gravity is g, is taken to another planet, where its period is 2s. The accelaration due to gravity on the other planet is most nearly...?
A) g/4
B)g/2
C) g
D) 2g
E)4g

2007-05-06 10:19:33 · 2 answers · asked by crank 2

I am trying to find the way to produce the maximum current with the lightest weight of the most windings, from the lightest weight of a magnet. I think I am on to something that will change the way we think of power and its generation. Please look at my last question and see if you can inform me on how to do this. My goal is world changing and nothing less.

2007-05-06 10:09:46 · 2 answers · asked by brokolay 3

What is .62 in fraction form?

2007-05-06 10:08:06 · 7 answers · asked by kdbugsoccergirl 1

Is there a difference? My professor swears there is, but I can't find anything. Does anyone know where I can get them?

2007-05-06 09:47:11 · 7 answers · asked by Casually Lame 1

Losing Cargo. A box of mass 12.3 kg rests on the flat floor of a truck. The coefficients of friction between the box and floor are U_s = 0.190 and U_k = 0.140 . The truck stops at a stop sign and then starts to move with an acceleration of 2.23 m/s^2.

a) If the box is a distance 1.83 m from the rear of the truck when the truck starts, how much time elapses before the box falls off the truck? Take the free fall acceleration to be 9.8 m/s^2

b) How far does the truck travel in this time?
Take the free fall acceleration to be 9.8 m/s^2

2007-05-06 09:43:38 · 1 answers · asked by Anonymous

Can anyone help me on this one? Ive heard about it but it doesnt make any sense at all.

2007-05-06 07:52:57 · 3 answers · asked by indie124 2