Physics - August 2007

2007-08-17 13:43:56 · 7 answers · asked by Mr. Goodnight. 3

i made it out of a networking wire, is this strong enough not to break if it will hold 287Lbs?

I'm done with taking my meds, and the hell of life.... please respond fast or i will test it myself..

2007-08-17 12:51:14 · 5 answers · asked by Anonymous

If we turned all matter into energy through atomic breakdown, at what point would it become matter and how. How does something that is not physical become matter which has a substance?

2007-08-17 12:30:15 · 4 answers · asked by Ryan G 2

t/s 0 10 20 30 40 50 60 70 80
a/ms^-2 30 31.63 33.44 35.47 37.75 40.33 43.29 46.69 50.67
Calculate the velocity and height of the rocket at time t=80 sec

2007-08-17 12:15:01 · 4 answers · asked by da old phizo 1

Can I travel to the speed of light???

2007-08-17 11:19:54 · 15 answers · asked by Anonymous

You have to make a tower with only those materials. What would be the best way to do this?

2007-08-17 10:18:29 · 3 answers · asked by Jacob C 1

Speed of light: The maximum speed an object can have, and its impossible to go faster.
Relativity: For example, a train is moving at 60 mph, you are on the train and throw a rock from the front in the direction of travel at 10 mph. Relative to the ground, the rock is traveling at 70 mph.

Problem: We assume there is a zero velocity point in the universe, say the exact middle or the place of the big bang or whatever, and that the universe is always expanding, therefore has a positive velocity in some direction outward. If the Earth is moving away from the center of the universe at 0.5 times the speed of light and we launch a satellite in the same direction at 0.75 times the speed of light, it should be going at 1.25 times the speed of light from the perspective of the zero velocity point. How is this possible if the speed of light is the maximum that any object can travel?

2007-08-17 09:49:10 · 9 answers · asked by onecentsmrt8563 2

Do any scientists have any idea when and if the universe ends?
Surely there cannot be something that goes on and on with no end. Its bothered me for a while that it cant be possible for it to stretch out to nothingness. if you travel far enough, there must be an end. but what would this end be? a wall? a forcefield, or another universe? Its really confusing
does anyone have any sensible ideas?

2007-08-17 09:48:44 · 12 answers · asked by Anonymous

2007-08-17 09:34:49 · 1 answers · asked by Amin A 1

There is a valve
http://upload.wikimedia.org/wikipedia/en/4/4f/USPatent6518683.png
installed in the 'middle' of the pipe.

What will be the force acting on the valve, if we intantly close it, and block water flow?

2007-08-17 09:23:16 · 4 answers · asked by Alexander 6

The title should be self explanatory.

2007-08-17 09:05:34 · 5 answers · asked by Anonymous

What's the big deal?

2007-08-17 08:25:01 · 5 answers · asked by Anonymous

1. 2 kg mass whirled in vertical cirle of radius 3 m at constant speed of 4 m/s. What is its kinetic energy?

2. A mercury barometer reads 780 mmHg. The pressure in Pa= 104,000 what will it read if the working fluid is changed to water?

3. 20 g mass is hung from spring length 16 cm. Adding 10 g increases length to 19 ccm. What is unstretched length of spring?

4. formula for rotational inertia?


PLEASE HELP FINAL THIS WEEK!

2007-08-17 08:19:27 · 2 answers · asked by Anonymous

2007-08-17 07:27:51 · 7 answers · asked by HINESKECHUP 1

I need help with these three questions please help physics final coming up this week!!!

A disk initially rotatin at 120 rad/ s is slowed down with a constant angular accel of 4 rad/ s^2

1. how long does it take to stop?
2. through what angle does the disk rotate during this time?
3. how many revolutions does it make before stopping?

PLEASE HELP !!!

2007-08-17 07:14:53 · 2 answers · asked by Anonymous

2007-08-17 06:40:50 · 2 answers · asked by jainvikas162 1

In the double slit experiment we observe interference pattern when two slits are used and no detector is present at slits , now when the electron gun fires at a very slow rate suppose 1 elec/30 min then also we observe interference pattern , now we wish to see that elec is going through which slit so we place a detector with a very high resolution at one slit then we do not observe the interference pattern , suppose the resolution is made as low as possible as half width of slits then will we observe intereference pattern or not ? If we do not then the contradiction is that we should observe the interference pattern but we are not , am i right ?

2007-08-17 06:22:01 · 3 answers · asked by Devil 4

2007-08-17 06:13:27 · 2 answers · asked by Alexander 6

2007-08-17 05:53:02 · 2 answers · asked by Alexander 6

A mover is pushing a moving box along a floor at a constant speed. Without changing the direction of the push, is it possible for the mover to increase the force pushing the box in such a way that the friction force increases? To decrease the pushing force so that the friction force increases?

2007-08-17 05:48:53 · 3 answers · asked by Anonymous

2007-08-17 05:31:27 · 4 answers · asked by V. Manohar 1

What would be a good use for hafnium?

2007-08-17 05:23:13 · 1 answers · asked by Anonymous

Why do contact forces arise ?

2007-08-17 05:11:41 · 3 answers · asked by Alfred E Neuman 1

2007-08-17 04:57:21 · 1 answers · asked by Anonymous

A shiny new sports car sits in the parking lot of a car dealership. Above is a cargo plane, flying horizontally at 50m/s. At the exact same moment the plane is 125m directly above the car, a heavy crate acedientally falls from its cargo doors. Relative to the car, where will the crate hit?

The answer is 250m away from the car.
How do you do it?

2007-08-17 04:56:11 · 4 answers · asked by boy101 3

With the exception of two holes on top in the exact shape of my feet, and I was lowered onto those holes at the exact same time, could I stand on water?

2007-08-17 04:48:50 · 8 answers · asked by Anonymous

2007-08-17 04:48:08 · 6 answers · asked by devigowri 2

I have a friend that died a long time ago and now she has been haunting my dreams and sometimes when I glace at a picture, I think I see her.
I would like to "talk"to her to find out why she keeps coming back to me.
How would I do that without any direct or indirect harm being done to me or anyone close to me?

2007-08-17 04:38:02 · 7 answers · asked by Anonymous

cont.
separated by 6.4 x 10^8 cm, how long has this drift been occuring?

2007-08-17 04:34:30 · 3 answers · asked by ayecajoy 1

... a deeper underlying theory (that might further explain WHY it works)?

2007-08-17 04:21:03 · 10 answers · asked by Anonymous