Physics - April 2007

2007-04-13 22:06:34 · 15 answers · asked by Joanne Hunter (Jo) 2

2007-04-13 21:25:59 · 12 answers · asked by jonathan_clein 1

If E=mc^2
then

mass= E/C^2, current speed of light is x meters/sec.
and E energy is in the order of joules

so mass= joules * sec^2 / meters ^2 , so does this imply that in order for mass to exist, time must exist

say time =0, then m = joules *0^2/ meters^2 =0

now consider a graph such as y=2x, obviouly the slope is 2 the rise over the run, impling that we can integrate to get the area under the curve

now going back
Let sec^2 = time for conviniance
and meter^2 = distance

mass = joules *time/ distance

now take the integral of both sides, by using time/ distance slope
integral(mass) = integral(joules*d(time)/d(distance))

mass is constant
joules are constant

so

mass= joules* integral ( dt/dd), dt/dd = instantaneous slope of time over distance

so time and distance are related ?

going back E=mC^2,

so 1/C^2 = integral ( dt/dd)

???

Im intrested in this subject, if you have any derivations or theories plz share :)

2007-04-13 21:15:26 · 2 answers · asked by dragongml 3

Twin Paradox.
One twin stays on earth. The other goes off into space at the speed of light. In earth time, he's gone for 20 years. When he returns, his brother has aged 20 years, but he hasn't aged at all

2007-04-13 21:10:49 · 3 answers · asked by Anonymous

the electric potential due to an electric dipole on its axis at distance r will be...
KP\r^2
KP\r
zero
KP

2007-04-13 19:59:29 · 2 answers · asked by godisgreat 1

\If the image is to be projected onto a screen 4.6 m away, how far from the lens should the slide be placed in cm?Can anyone help me tackle this problem?

2007-04-13 19:28:55 · 2 answers · asked by Anonymous

2007-04-13 19:21:54 · 4 answers · asked by raghu 1

a) Would you rather land with your legs bending or stiff ?
b) Why do cricket fielders move their hands backwards when catching a fast ball?
c) Why do railway carriages have dampers at the front and back?

2007-04-13 18:54:19 · 5 answers · asked by hafsa a 1

2007-04-13 16:10:12 · 7 answers · asked by Jay M 2

I have heard that whenever you put the quantum theory with general relativity and gravity together, the force between two gravitons becomes infinite, but how? why?

2007-04-13 14:44:46 · 1 answers · asked by The Ponderer 3

What is the relative humidity in a room whose dry bulb temperature was 14 degrees celsius and the wet bulb temperature was 8 degrees celsius.

2007-04-13 14:18:07 · 3 answers · asked by mysterious_qt 2

The distance between the earth and the Sun is about 93 million miles. To reduce the difficulties of dealing with the large numbers of these distances scientists have deisignated the distance from the earth to the Sun as one___________, or AU.
Please Help Me Fill in the blank

2007-04-13 12:38:14 · 4 answers · asked by Justin F 1

2007-04-13 12:05:44 · 8 answers · asked by pinkygirl m 3

A 2 m long large coil with a radius of
19.2 cm and 170 turns surrounds a 7.8 m
long solenoid with a radius of 9.2 cm and 4000
turns.
The current in the solenoid changes as
I = I0 sin(2*pi*f*t)
where I0 = 30 A and f = 60 Hz.
Inside solenoid has 4000 turns and putside coil has170 turns.
Find the maximum induced emf E in the
large coil. Answer in units of V.

2007-04-13 10:53:30 · 2 answers · asked by mcgrady111 1

My microwave was full of ants so i decided to run it for a minute to kill them all off. To my surprise when i opened it a while later they were still running around as happy as ever, didnt even seem a little panicked. How come it heats up water to boiling in a minute but didnt cook these critters?

2007-04-13 10:52:40 · 9 answers · asked by nicolette 3

today, i have heard that there is a fourth dimension and that what we process when someone is talking to us, they have actually said it five minutes ago, basically some sort of lag...does anyone know more about this?

2007-04-13 10:23:10 · 8 answers · asked by Anonymous

better be good

2007-04-13 10:19:09 · 4 answers · asked by SHELLTOE BISCUITS 3

what does it do to you?

2007-04-13 10:12:05 · 6 answers · asked by Anonymous

2007-04-13 09:15:26 · 2 answers · asked by Brandy J 1

2007-04-13 08:09:29 · 2 answers · asked by drsemsem2004 1

Is it true that the combined explosive power of all of the bombs and explosives used in every war in history [including Hiroshima and Nagasaki bombs] would not equal the explosive power of the biggest H-bomb ever made?
My understanding is that 50Mtons is the most powerful yet built.

2007-04-13 07:53:37 · 6 answers · asked by Christopher L 2

I just really wonder about what it means.

2007-04-13 07:49:14 · 12 answers · asked by Anonymous

It is the question of semiconductor physics

2007-04-13 07:28:51 · 3 answers · asked by tOxIcBaChElOr 1

Two point charges are separated by 10 cm. The attractive force between them is 26 N. If the two charges attracting each other have equal magnitude, what is the magnitude of each charge? (in coulombs)

2007-04-13 07:18:43 · 4 answers · asked by Dirck G 1

I had thought of placing an array of 50 small magnets using the same polarity into a close-knit grid. Then I thought of putting two magnets together so that the same polarity is exposed on each side that would repel against the array of magnets. My guess is that gravity would eventually rule out even if I could somehow insulate the reverse polarity that would cause an attraction.

My goal is simply to try and use the repelling magnetic force for the purpose of basic suspension. It appears that bismuth and graphite may be the best option because they can be good diamagnetic. Anyone have any good and affordable ideas?

2007-04-13 06:31:12 · 5 answers · asked by Racer X 1

Newtons law of gravitation states that the mutual gravitational attraction between an object and the earth increases with the mass of that object.

2007-04-13 06:22:54 · 5 answers · asked by Anonymous

2007-04-13 06:16:23 · 3 answers · asked by daniel r 1

A 120 kg scuba driver with tanks and equipment is submerged and floating underwater in seawater. The volume of seawater displaced by the scuba driver with tanks and equipment is (den=1025)??

120 / 1025 = 0.117

am I right??

2007-04-13 06:06:24 · 3 answers · asked by Anonymous

It seems to me that determinism (theory?) is obviusly correct but I'm only 15 and I don't know much about quantum mechanics and other very important subjects. If physicists find this theory possibly correct, may I say that fate make some sense in physics? (sorry for my English, I hope I made my question quite clear)

2007-04-13 05:52:17 · 2 answers · asked by Boomsala 1

Has quantum physics made the world infinitely more dangerous?

2007-04-13 05:26:05 · 4 answers · asked by mouthbreather77 1