Physics - January 2007

why would stepping on one bug alter the future? can we actually time travel with the proper equipment? i don't get how we can travel back in time.. how did superman time travel by going around the earth very fast?

2007-01-24 18:16:39 · 4 answers · asked by Anonymous

Einstein, Tesla, or Stephen Hawking, or do believe someone else is bigger genius than these people?

2007-01-24 17:54:37 · 8 answers · asked by sexy joker 6

2007-01-24 17:42:43 · 12 answers · asked by Varun N 1

2007-01-24 17:14:16 · 2 answers · asked by JJJJ 1

it is small.and have only 2 or 3 lens.

2007-01-24 17:08:25 · 1 answers · asked by Anonymous

while finding the electric field intensity of a charge why do we always take a unit positive test charge and not a unit negative test charge?

2007-01-24 17:08:03 · 2 answers · asked by romy 1

2007-01-24 17:01:33 · 4 answers · asked by dana 1

There is great hussle about a coal based power project coming up at Padubidri in Udupi Taluk near Mangalore, Karnataka. The Government and the Nagarjuna Company are bent upon establishing the project despite opposition from local population and fishermen. If there is absolutely no control on flying ash from this proposed project from falling into open wells, ponds, rivers and ocean then it is not right to start a project which destroys ecology. Of course we need power for our development. But development should not be the cause of for our destruction due to ecological damages. Hence, please answer the above question preferably by poeple who are living near such power projects.

2007-01-24 16:48:22 · 3 answers · asked by Benedict F 1

2007-01-24 16:47:24 · 6 answers · asked by spartan_0084 1

2007-01-24 16:40:10 · 9 answers · asked by spartan_0084 1

i m doping a project on surface tension...i hav 2 prove that surface tension depneds on radius of d tube n density of liquid taken in it...i will do this by capillary rise method using 3 different liquids,.,,plz tell me wat all shall i write in d theory part......and plz tell me d density of copper sulphate

2007-01-24 16:38:38 · 3 answers · asked by unrealankush 1

Question: While you read this question look at this diagram http://i3.tinypic.com/3zho01t.jpg...

A small plastic ball with a mass of 6.50 x 10^-3 kg and with a charge of +0.150 uC is suspended from an insulating thread and hangs between the plates of a capacitor (see the drawing). the ball is in equilibrium, with the thread making an angle of 30.0 degrees with respect to the vertical. the area of each plate is 0.0150 m^2. what is the magnitude of the charge on each plate?

My Approach: I tried to find q using Q = mg/E, but it ended up in a mess since I was looking for the magnitude. The area is throwing me off...I don't know how to utilize it. In general, this is a very tough question! would love all the help i can get. I've tried everything and even a little hint wont help! someone show me the whole solution b/c i give up.

(note: i will award a best answer)

2007-01-24 16:31:20 · 3 answers · asked by Anonymous

i know of 4: length, width, depth, and time. are there any more?
if so, are they impossible to visualize?

2007-01-24 15:55:54 · 5 answers · asked by Anonymous

Consider a steel guitar string of initial length L=1m and cross-sectional area A=.500mm^2 . The Young's modulus of the steel is Y= 2.0*10^ 11Pa . How far (Delta L) would such a string stretch under a tension of 1500 N?Express your answer in millimeters using two significant figures. and in mm.

I 've tried lots of times this problem and I keep getting it wrong could someone help me out I've tried lots of times and I dont get it right.

2007-01-24 15:48:47 · 2 answers · asked by Anonymous

some campers. The airplane, moving horizontally at a constant velocity of 140 km/h, approaches the spot at an altitude of 0.500 km above level ground. Having the designated point in sight, the pilot prepares to drop the package.(a) What should the angle be between the horizontal and the pilot's line of sight when the package is released? (b) What is the location of the plane when the hits the ground?

2007-01-24 15:43:35 · 3 answers · asked by Anonymous

2007-01-24 15:41:15 · 1 answers · asked by abembo 1

i was just wondering if you could tell me. that would be great. it was also the tempature of the center of where the atomic bomb was droped on hershima, or something like that

2007-01-24 15:35:31 · 10 answers · asked by Me 3

2007-01-24 15:22:36 · 5 answers · asked by m i c h e l l e 1

We are having raw data from Bruker D8 Xray diffractometer, we want to do Reitveld Refinments of this with FullProf software,How to make a data file for this task.We are using WinPLOTR for the refinments.

2007-01-24 15:19:19 · 2 answers · asked by Anonymous

1).Use the equation 1/o + 1/i = 1/f to solve the problem. Object distance is o, image distance is i, and focal length is f. When you focus on a newspaper page, the lens in your eye forms a real image of the paper on the retina in the back of your eye. The light-sensitive retina then translates the patterns of light and dark areas to your brain, which in turn interprets them as words. If your newspaper is 29.0 cm from your eye, and the focal length of your eye is 2.4 cm, what is the diameter of your eye from front to back? (The diameter of your eye is the image distance.)

I did 1/29+1/i=1/2.4
1/29-1/2.4=1/i now would i just solve and get the right answer? to be the result of 1/2.4-1/29?

2).Consider a simple magnifying glass under water. Will it magnify more or less than in the air?
more
less
not enough information to decide

i said more, because light travels faster in water thus enabling it to be magnified more?

2007-01-24 15:17:31 · 3 answers · asked by Anonymous

my answer: ν = 3x10^8 m/s / 2x10^–4 m = 1.5x10^12 Hz, but how to u know which type of energy is this?

2007-01-24 15:06:44 · 1 answers · asked by clock 2

i know in quantum electrodynamics that supposedly particles can send forces through force particles, but what does it mean to say something touches something else. For anything to interact on a fundamental level there is a special state of spatial relationship required, namely that the two particles must occupy essentially the same space for an instant to effect one another. What is it that makes this state special and turns the cogs of our ever evolving universe through interaction? and what is it about time that allows for a "conduit" through which change is given the right to take place? If we abandon all our presumptions (about space, time, and cause and effect) and try to boil our universe down to pure logic, will it ever work? or does the existence of reality itself, in whatever form, defy logic inherently?

Can anyone help me brainstorm about this problem of a universe which defies pure logic and seems to work, on its most fundamental levels, by what can only be called "magic"

2007-01-24 14:31:53 · 1 answers · asked by E-Z 1

Assume that light of wavelength 532 nm strikes the top of two plates of glass nearly perpendicularly. The glass plates are in contact at one edge and separated by a thin sheet of paper at the other edge forming a narrow wedge of air between the two plates. The paper has a thickness of 4.10970×10-5 m. Determine the number of bright fringes that occur from the place where the plates touch to the edge of the sheet of paper.

I've tried the formula m= (2*thickness)/wavelength -.5. I got 154 and it didn't work.

2007-01-24 14:28:30 · 1 answers · asked by kmaster2007 1

a. permanence
b.obstinacy
c.resiliency
d.inertia

2007-01-24 14:23:33 · 6 answers · asked by jackie O 2

A piece of quartz (d=2.65 g/cm^3) has a volume of 10 cm^3. What volume of the piece of the quartx will be submerged when floating in a container of mercury (d=13.6 g/cm^3).

2007-01-24 14:23:07 · 3 answers · asked by JaJarvis 1

length of asphalt highway that is 46.0 feet wide and 24.6 centimeters deep in order to raise the temperature 2.50 oC ?



The average density of asphalt is 721 kg/m3



The specific heat of asphalt is 0.920 kJ/kg-oC

2007-01-24 14:19:38 · 2 answers · asked by Anonymous

2007-01-24 14:17:56 · 8 answers · asked by goher s 1

electromagnets of long range attraction force but should be round in shape and small of radius 2cm.

2007-01-24 14:12:38 · 3 answers · asked by Anonymous

2007-01-24 14:11:56 · 6 answers · asked by WildBreak32 2

in measuring the volume of cylinders, which dimension should you be more accurate about? the length or the diameter?..explain why.

2007-01-24 14:01:45 · 3 answers · asked by Anonymous