Physics - July 2007

http://answers.yahoo.com/question/index;_ylt=Ai.ojMfYKkrfj2PxWoMXV_3sy6IX?qid=20070716070831AAZzSAk

2007-07-16 05:55:22 · 3 answers · asked by Anonymous

2007-07-16 04:07:48 · 3 answers · asked by mrsjoshgroban 1

Last night I videotaped these fireworks:
http://weber.edu/WSUToday/062707pops2007.html

The edge of the campus of this university is 1.2 miles from my house. So that's the minimum possible distance to the school. They were launching fireworks straight up in the air. I video taped them from my back yard. The sound was ~2 seconds after the explosions.

Can sombody explain that?

2007-07-16 03:08:31 · 5 answers · asked by Anonymous

What scientific experiment way for the ultimate acceptance of yukawa's theory?

Thanks to all!

2007-07-16 01:05:28 · 1 answers · asked by chelzy y 1

2007-07-15 23:01:40 · 10 answers · asked by NONAME 1

2007-07-15 22:33:22 · 5 answers · asked by genesis 1

2007-07-15 22:27:48 · 2 answers · asked by genesis 1

2007-07-15 22:22:39 · 4 answers · asked by genesis 1

"A 1.5 N ball is thrown at an angle of 30o above the horizontal with an initial speed of 12 m/s. At its highest point, the net force on the ball is:
a. 14.7 N down
b. 9.8 N, 30 degrees below the horizontal
c. zero
d. 9.8 N up
e. 1.5 N down
is there equation for the highest point? I thought it is zero because it has only constant horizintal velocity, so acceleration is zero and net force is zero. I got wrong. Anybody please explain to me?

2007-07-15 21:22:30 · 3 answers · asked by Anonymous

No comment...

2007-07-15 19:35:30 · 2 answers · asked by jim_tomb_stone 1

I am aware that sunglasses with blue and purple tints are supposedly harmful to eyes because they are energetically in the higher end of the visible light spectrum and some scientific reports say that they do not prevent, and might even cause cataracts in the eye. Does powder pink count as lower valued shade of purple or is it a variation of red (way down there near the infrared end of the spectrum)?

2007-07-15 19:04:24 · 2 answers · asked by bibimbapbambina 3

A hot air balloon is ascending straight up at a constant speed of 7.0 m/s. When the balloon is 12.0 m above the ground, a gun fires a pellet straight up from ground level with an initial speed of 30.0 m/s. Along the paths of the balloon and the pellet, there are two places where each of them has the same altitude at the same time. How far above ground level are these places?

Could you please put an explanation as well? I've been working on this for so long, but I am just no good at physics. Thank you.

2007-07-15 18:46:13 · 3 answers · asked by kathryn 2

If it does wouldnt it need a large amount of force to propell it? If you had enough light could you push an object?

2007-07-15 18:30:54 · 7 answers · asked by Anonymous

wat i am really wondering is if UV light can pass through plastic wrap so that wastever is on the other side of the plastic will be effected by the UV

2007-07-15 18:12:11 · 3 answers · asked by tanman 1

2007-07-15 18:00:16 · 4 answers · asked by JAMES 4

1) What is the work done by you on a book that you lift straight up off a table?
- positive
- negative
- zero
- can not determine
2) You are in a game of toss the water balloon. When you catch the balloon that is thrown to you, the work you do is
- positive
- negative
- zero
- not enough information
3) You are holding your cell phone to your ear. You are doing
- positive work on the phone.
- negative work on the phone.
- zero work on the phone
- not enough information
4) You are throwing a ball against a wall so that it bounces off the wall with the same speed that it hits the wall with, the work done by the wall on the ball is
- positive
- negative
- zero
- not enough information
5) You are parachuting out of an airplane. Once your parachute opens, as you fall the work done by gravity on you is
- positive
- negative
- zero
- not enough information

2007-07-15 17:34:06 · 4 answers · asked by Anonymous

if had a styrofoam cup and liquid nitrogen was added to the cup and then recorded the mass vs time on a graph. And then had a stryofoam cup that had a wider mouth and liquid nitrogen added to the cup and then recorded the mass vs time on a graph. Would the slope of the graph be greater, shallower, or the same for the cup that had the wider mouth??

2007-07-15 17:25:33 · 2 answers · asked by lola 1

suppose two equal and opposite charges are arranged as shown, and that the Q1=Q2=4.0 mico coulombs while the distance between the charges (a)=10cm.

Q1-------------------Q2

consider the point P, located at a distance=5cm directly above Q2

1)draw arrows showing the electric field contributuions of each charge at P.

2) Calculate the net total electric field vector, magnitude and direction at P


im so confused by this question, you dont have to give me the answer just a hint on how to solve..thanks

2007-07-15 16:54:20 · 0 answers · asked by Kel 1

an aluminum bar was first placed in liquid nitrogen and then in water. When the bar was placed in the water, it formed ice. What caused it to form ice?

2007-07-15 16:48:21 · 5 answers · asked by lola 1

for example somone places a pen in there had turns it around and it remains magnitized and stuck to the hand. like static electricity, how does it work? dont you have to rub the pen in your hand first for that?

2007-07-15 16:25:55 · 3 answers · asked by Cally 3

thanks for your time

2007-07-15 16:24:15 · 1 answers · asked by Buck BUCK 2

If you had the power to stretch space time with your own hands, through years of knowledge and training, so that you could create optical effects of distorted space time around you, and also so that you could move extremelly fast, and have increased strength, what would you do with this power? and would you tell anyone?

2007-07-15 14:57:13 · 4 answers · asked by kali_blue_sea 1

If you had the power to stretch space time with your own hands, through years of knowledge and training, so that you could create optical effects of distorted space time around you, and also so that you could move extremelly fast, and have increased strength, what would you do with this power? and would you tell anyone?

2007-07-15 14:56:32 · 3 answers · asked by kali_blue_sea 1

If you had the power to stretch space time with your own hands, through years of knowledge and training, so that you could create optical effects of distorted space time around you, and also so that you could move extremelly fast, and have increased strength, what would you do with this power? and would you tell anyone?

2007-07-15 14:56:12 · 2 answers · asked by kali_blue_sea 1

If you had the power to stretch space time with your own hands, through years of knowledge and training, so that you could create optical effects of distorted space time around you, and also so that you could move extremelly fast, and have increased strength, what would you do with this power? and would you tell anyone?

2007-07-15 14:55:55 · 3 answers · asked by kali_blue_sea 1

2007-07-15 12:49:47 · 1 answers · asked by Anonymous

2007-07-15 12:29:16 · 1 answers · asked by JAMES 4

IS water harder than GROUND?

2007-07-15 12:25:01 · 4 answers · asked by Anonymous

Personally, I think Newton was. Obviously Einstein is up there too.

2007-07-15 12:21:47 · 7 answers · asked by icingonthecake 2

What is the highest pressure achieved by man to compress liquids for instance in the laboritory

2007-07-15 10:49:17 · 1 answers · asked by Anonymous