Physics - August 2007

OK, this is my 9 year old daughter's question. I am not sure if this is a physics question but I can't think what other subject to ask under.

If you blow bubbles using a bought bubble kit and blow them in the rain why do they not burst? Does the rain drop become part of the bubble? Does it pass through? Bounce off? Slide off? Or on that day, did every rain drop miss every bubble?

An anxious 9 year old awaits.

2007-08-19 02:00:06 · 15 answers · asked by mathias 1

What is the earth, neutral and live wire for?
What colors are they respectively?

2007-08-19 00:39:35 · 3 answers · asked by Booyah! 3

Your views about develpoment of science.

2007-08-18 22:39:46 · 5 answers · asked by Anonymous

Why does the solution get decomposed after electrolysis? What does decompose mean in terms of science?

I understand electroplating is an object coated with a thin layer of metal using electricity like our kettle. But without electricity, the kettle is still shiny and not rusty. So what is electroplating?

Please explain everything in the simplest form.

2007-08-18 22:00:09 · 2 answers · asked by Booyah! 3

the following article was posted to me by mail:

Sudarshan Reddy has theoretically proven the existence of a sub-atomic particle, which can travel at speed greater than that of light, thereby challenging one of the fundamental postulates of the "Theory of Relativity".

In his recent research paper submitted to the Institute of Advanced Physics (IAP) at Trieste ( Italy ), Sudarshan has proved the existence of a class of sub-atomic particles called "leptons",which can travel faster than light.

do u guys believe this is true? i dont know much about leptons and stuff, is it possible?

2007-08-18 21:33:20 · 5 answers · asked by muck-ta 1

2007-08-18 18:55:50 · 9 answers · asked by ► Anx Rox ◄ 3

I'd just like some reasoning and an explanation on how to do this question, you don't necessarily have to do it.

A hammer at the top of a roof slides from rest and falls to the ground at P. The roof is smooth and sloped at an angle of 30 degrees to the horizontal as shown in the figure below:
http://i242.photobucket.com/albums/ff10/breakthiscycle/101-1.jpg
The roof is 10 meters long and its lowest point is 10 meters from the ground. Calculate:
a)to the nearest significant figure, the velocity of the hammer when it reaches the lowest point on the roof.
b)the horizontal component of its velocity when it strikes the ground.
c)the vertical component of its velocity when it strikes the ground
d)the angle that the velocity of the hammer makes with the ground.

2007-08-18 18:30:56 · 4 answers · asked by Anonymous

A block accelerated from rest by force along smooth incline for 5m until it clears the top of the ramp at speed 8m/s.
How can I find the highet elevation (h) above the x-axis for the block by by using this formula: V2=U2+2as?

2007-08-18 18:07:58 · 5 answers · asked by Ham J 2

What is the brain's processing speed?

2007-08-18 17:55:15 · 5 answers · asked by oblivion60 1

Can someone explain to me what resonance means without copying Wikipedia?

And why can singers break glass using his/her own voice?

Thanks.

2007-08-18 17:47:53 · 11 answers · asked by Anonymous

Three resistances having identical resistance r connected in parallel.The cell & the ammeter have negligiable resistance.With the switch open,the ammeter reads 0.6 A.What will be the ammeter reading when the switch is closed?

2007-08-18 17:42:33 · 4 answers · asked by Anonymous

An object with mass m and speed v explodes into two pieces, one three times as massive as the other; the explosion takes place in gravity-free space. The less massive piece comes to rest. How much kinetic energy was added to the system?

2007-08-18 17:05:12 · 3 answers · asked by physics maniac 2

How much does an average lighting bolt weigh?

2007-08-18 17:02:37 · 5 answers · asked by cal 1

Let's just say I (or you or whoever) make a group of people laugh -- they would probably all be focusing on you and directing positive energy toward you. People generate energy and can direct and sense it.

Is there a way that one could absorb this energy effectively, or does it just happen naturally, or is it not possible to do?

Odd question I realize and I wouldn't be surprised if I got no answers but I said I'd throw it out there anyway and see.

2007-08-18 17:01:03 · 7 answers · asked by Lanky Larry lol 1

The answers to the Universe

By Michael Gonzalez




There are vertical and horizontal Lines that make up our known Universe. Together they are known as the fabric of time and space. They all run at the speed of light never making contact with each other. Time can be defined as the movement of these lines in space. They carry light among many other things and can go through all objects. But not all that they carry can go through those objects. Light can get tangled up between these lines and travel with them, not being able to pass through objects they bounce off tingling our visual senses and enabling us to detect the object. Any object can warp these lines, but only at it edges and only ever so slightly. When these lines warp around a large object we feel it as Gravity. Magnetism is also an effect of warping these lines. These lines have different sets of laws of physics not understood by scientist, but there getting there. What we know as dark mater is these lines present in the vacuum of space and dark energy is what these lines contain. The collective energy of these lines can move a galaxy at almost the speed of light. And the collective mass of these lines can account for everything else that might seem missing in the UNIVERSE.


Oh how stupid of you, not to have thought of it yourself..!

2007-08-18 16:57:30 · 1 answers · asked by gone 2

An ideal spring has a compression force constant of 40 N/m.
a) Use the grid provide to draw a force-compression graph for the spring.
Ok so the x-axis says Compression (m) and has 0, 0.1, 0.2, 0.3 and 0.4.
The y-axis has Force(N).
I used F = kx to get the following coordinates:
(.1,4)
(,2,8)
(.3,12)
(.4,16).
Is that right?
b) Use the graph to determine how much work is done in compressing the spring from
i) 0.0 to 0.1m
ii) 0.1 to 0.2m
OK so if u use W = Fx,
then you get for i) W = 0.1 x 4 = .4 J
But if u work it out like this:
Us = 1/2 kx^2, u get something else:
1/2 x 40 x .1^2
= .2 J?
So which equation is correct? I'm assuming my teacher wants me to use the first equation, because she specifically says 'Use the graph to determine...' but is it right? Why don't the two equations match up???

If u could explain the concept and why I'm getting it wrong, that would be great thanks!!

2007-08-18 16:54:11 · 5 answers · asked by Anonymous

A 6000 kg spaceprobe moving nose-first toward Jupiter at 100 m/s relative to the sun fires its rocket engine, ejecting 80kg of exhaust at a speed of 250 m/s relative to the spaceprobe. What is the final velocity of the probe?

2007-08-18 16:52:30 · 1 answers · asked by physics maniac 2

The rain has stopped (refer to prior question ROLLING IN THE RAIN). A drain plug is opened in the bottom of the rolling (without friction) open railroad car allowing the accumulated water to run out. Consider the effects of the draining water on the speed, momentum, and kinetic energy of the rolling car.

The speed of the car will

a) increase
b) decrease
c) not change

The momentum of the car will

a) increase
b) decrease
c) not change

And the kinetic energy of the car will

a) increase
b) decrease
c) not change

2007-08-18 16:20:25 · 1 answers · asked by ? 6

2007-08-18 14:41:23 · 5 answers · asked by JAMES 4

2007-08-18 14:38:39 · 9 answers · asked by Anonymous

a successful sexual procedure produce life when climax . To me its the same as big bang theory. is this true can any one show me a mathematical explanation

2007-08-18 14:28:20 · 4 answers · asked by Anonymous

2007-08-18 13:57:05 · 2 answers · asked by Anonymous

Engineers design racings cars with low centre of mass and widely spaced wheels to improve their high speed cornering ability. Explain using moments, how this helps.

2007-08-18 13:29:05 · 5 answers · asked by Anonymous

2007-08-18 12:33:29 · 6 answers · asked by Anonymous

please view this: http://upload.wikimedia.org/wikipedia/en/3/3b/Sun_and_VY_Canis_Majoris.png

then, consider for a moment if there could be suns bigger than that very far away, and planets slightly smaller, the lifeforms on that planet would be enormous compared to us, is this possible, if so then a speck of dust to us would be what to them? Or would it be virtually impossible for there to be planets that big with life on them?

2007-08-18 11:45:17 · 8 answers · asked by Papa Johnathan 4

relating to physics that would also be annoying to have to answer

2007-08-18 11:08:32 · 9 answers · asked by Felicity 3

2007-08-18 11:06:38 · 25 answers · asked by april b 1

2007-08-18 11:04:15 · 7 answers · asked by april b 1

For example: not a soda bottle full of water (that is a no brainer) But lets say a solid steel ball 10 foot around with a 4" space in the center full of water!!!!
Bring the temp. to well below freezing 'Would the water stay a liquid or turn to ice thus bursting the ball? I guess my question is Does water have to expand to become ice or can you have super cold water below the freezing point that is still a liquid?

2007-08-18 10:58:54 · 7 answers · asked by Thomas E 1

2007-08-18 10:40:46 · 9 answers · asked by digitallyneosticated 2