Physics - December 2006

2006-12-29 20:49:29 · 11 answers · asked by nocus 2

how is it possible to build a time machine to travel forward and back in time and how could it possibly work

2006-12-29 19:57:34 · 25 answers · asked by Anonymous

I have a rigid glass tube that is 1000 mm high.
It is dipped into a beaker of mercury.
On top of the column is attached a large syringe.
The atmospheric pressure is 760 mmHg.
I now apply a strong aspiration pressure by moving up the plunger of the syringe. The mercury column will now rise. My question (s) are: How high will the column rise ? If it rises only 760 mm Hg as i think it would, then what about the balance 240 mm ? What would occupy that volume ?
What if the tube was 3000 mm high ? What would occupy the 2240 mm of empty space ? (if the column doesn't go up all the way ).

2006-12-29 19:51:41 · 9 answers · asked by Nirmala 4

2006-12-29 19:46:45 · 21 answers · asked by afrprince77 2

In polarisation by reflection, why the polarised reflected light must be perpendicular to the plane of incidence(surface of paper)?
Extremely confusing.

2006-12-29 18:52:48 · 4 answers · asked by li mei 3

how a wave can travel prependicular to the direction of the disturbance of the particle of the medium?

2006-12-29 18:25:37 · 5 answers · asked by Saif 3

I have a booked called 'The Worlds Treasury of Pysics, Astronomy and Mathematics. I one part it states that Helium is the only substance that doesn't freeze at Absolute Zero unless there is pressure enough to squash the atoms together and therefore solidify. I have a hard time believeing this because I have always though that everything freezes at Absolute Zero.

Thanks.

2006-12-29 18:17:05 · 9 answers · asked by Lucas B 2

2006-12-29 18:06:28 · 8 answers · asked by ??? 1

2006-12-29 17:55:55 · 7 answers · asked by Anonymous

so that we can construct a house on the boat.

2006-12-29 16:51:11 · 13 answers · asked by dipti l 1

You have a 20 pound block of steel. You also have a 1 pound block of foam with the same size and shape as the steel. You drop them both from 20,000 feet above the moon's surface. They are in the vacuum of space so there is no atmospheric resistance. Which will reach the surface of the moon first, the steel or the foam?

2006-12-29 16:18:47 · 23 answers · asked by cheasy123 3

The problem was simple, I was only looking for the frictional force.

I gave two equations where the answer could be derived.

This is the problem:
A 1500-kg car is stationary on a ramp that makes an angle of 35 degrees with the horizontal. What is the magnitude of the force parallel to the ramp that keeps the car stationary?

I can't solve it. Please help.

2006-12-29 16:16:38 · 19 answers · asked by InfoDeficient=c 2

2006-12-29 16:15:45 · 6 answers · asked by ixat02 2

2006-12-29 16:03:45 · 10 answers · asked by SUN 1

2006-12-29 15:43:04 · 4 answers · asked by Anonymous

why was the discovery under reported?
If reveal to be true this would have tremendous impact.

2006-12-29 15:22:16 · 3 answers · asked by Kaushall 2

How reliable is this "I felt two impacts" statement as an indicator of what happened in a he said-she said accident report? First and foremost, the physics of it. In an in-line rear-ending type of collision, could Car 2 be forced into Car 1 by Car 3 in such a way that Car 1 actually receives two impacts, even though Car 2 did NOT impact Car 1 before being struck by Car 3 and forced into Car 1? A bounce/rebound effect type of thing?

Alternately, is there something in modern car construction, in this case an Acura, that might give the sensation of two impacts to the driver of Car 1, even though there really only was one? The way the body or frame contorts to take the blow, for instance?

And last, but not least, can I beat this rap in traffic court? I happen to be Car 2 in this case, and Car 1 says that, you guessed it, he "felt two impacts."

2006-12-29 15:18:53 · 7 answers · asked by thanksY2K 1

but one could theoretically travel forward in time. Is this true?

2006-12-29 14:47:30 · 14 answers · asked by masteryoda 3

2006-12-29 14:42:16 · 7 answers · asked by january 2

Does Einstein's theory exempt faster than light travel ? Is a theory that allows faster than light travel - that is mathematical valid ?

2006-12-29 14:41:45 · 9 answers · asked by Rodney Kawecki 2

The are an unimaginable amount of protons and electrons that compose the earth. How many atoms make up the world? I mean every grain of sand, every drop of water,every organism. EVERYTHING!

If you have the answer, or are even capable of showing that answer, then what would be the estimate for the atoms that make up everything in the known universe? (Assuming that the number is not infinite.)

2006-12-29 14:32:21 · 11 answers · asked by 12ated12 2

I remember learning about this in physics class, but I have forgotten the reason. Please explain. Thanks.

2006-12-29 14:23:01 · 11 answers · asked by Philippe 3

i got a bulb that doesnt light but still connected to the electric( i meant it is switch on). today, a storm(rain) came & suddenly a lightning flashes and i heard thunder. that bulb suddenly shines (for maybe 5-10 minutes) and when the rain is over the bulb doesnt light again. Can some1 explain?

2006-12-29 14:13:49 · 4 answers · asked by sinder_block 2

i know abought F=MA,but is ther a way to find initial velocity useing F and M[like if i apply a force of X to a mass of Y,its initial velocity will be great enough to propel it 50 meters upwards]

2006-12-29 13:33:29 · 6 answers · asked by the professor 2

I realize this 3rd dimension we live in, and the conprehension of the 5th dimesion is something 3rd dimensional beings were not meant to understand. So by adding to the collective consciousness my curiosity and alert awareness may be recognized by one of these beings. I know that they exist but at higher levels of understanding.

2006-12-29 13:09:51 · 8 answers · asked by Hector P 1

A traffic signal light is suspended by two cables.

UNDER WHAT CONDITION WILL THE TENSION IN EACH CABLE BE EQUAL TO THE WEIGHT OF THE TRAFFIC SIGNAL LIGHT?

2006-12-29 12:36:15 · 7 answers · asked by inthemaking 2

even if its in the ocean?

2006-12-29 11:51:24 · 5 answers · asked by brandonjay 1

if you were travailing the speed of light in a box and you turned a flashlight on would you see the light on the box ahead of you?

2006-12-29 11:50:58 · 13 answers · asked by Sunken-Ac3 1

Please tell me how to solve this AP problem?
While exploring a sunken ocean liner, the principal researcher found the absolute pressure on the robot observation submarine at the level of the ship to be about 413 atmospheres. The density of seawater is 1025 kg./m^3
a. Calc. the gauge pressure p sub g on the sunken ocean liner.
b. Calc. the depth D of the sunken ocean liner
c. Calc. the magnitute F of the force due to the water on a viewing port of the submarine at this depth is the viewing port has a surface area of 0. 0100 m 6^2

SUppose the ocean liner came to rest at the surface of the ocean before it started to sink. Due to the resistance of the seawater the sinking ocean liner then reached a terminal velocity of 10. 0 m/s after falling for 30 seconds
Calc. the time it took to from the surface-bottom.

2006-12-29 11:39:20 · 4 answers · asked by Kitana 2

In the laboratory you are given a cylindrical beaker containing a fluid and you are asked to determine the density of the fluid. You are to use a negligible mass and unknown spring constant attacked to a stand An Irregularly shaped object of known mass and density hangs from the spring. You may also choose a metric ruler, a stopwatch or a string to complete the task.
1.Exp. how you could experimentally determine the density of the fluid.

2006-12-29 11:15:15 · 1 answers · asked by Kitana 2