Physics - July 2007

2007-07-10 02:23:19 · 13 answers · asked by CHICKA 1

Do fast breeders reactors violates thermodynamic laws?
It is said that they create more fuel than they use to start with, dosen't this violate the first rule saying energy and matter cannot be created and destroyed?

2007-07-10 01:38:43 · 3 answers · asked by snishry 2

2007-07-09 23:37:12 · 2 answers · asked by prakruthi v 1

2007-07-09 23:11:13 · 8 answers · asked by CPUcate 6

2007-07-09 22:29:31 · 7 answers · asked by naga 1

a DC-8 airplane has a take-off velocity of 80km/hr which it reaches 35s after starting from rest. what is the manimum lenght of the runway? Pls.. show your solution...

2007-07-09 22:28:03 · 2 answers · asked by help_me7 1

a driver of a bus moving 90 km/hr suddenly sees a beggar crossing 40 m ahead. it takes 0.8s for the driver to apply the brakes. if the maximum acceleration during braking is 11m/s^2 the beggar hit by the bus? pls show your solution.. tnx

2007-07-09 22:25:25 · 2 answers · asked by help_me7 1

2007-07-09 22:19:55 · 4 answers · asked by naga 1

for which one i need to give more force?

2007-07-09 22:14:50 · 3 answers · asked by naga 1

"Two blocks are on a frictionless, level surface. They are in contact, but are not connected. Block 1 is on the left, and has a mass of 6.6 kg; block 2 has a mass of 4.2 kg. A constant force of 27 N is applied to block 1, parallel to the level surface. What is the magnitude of the force that block 1 exerts on block 2?" I solved first it's acceleration which is 4.09 m/s^2. Then I solved the Force, F=ma, F=(6.7kg)(4.09m/s^2)=27N. So the magnitude is 27. What did I make mistake? the answer says incorrect. Can anybody know this? please explain to me. Thanks.

2007-07-09 21:16:43 · 5 answers · asked by Anonymous

How do the hanging mass and rotating mass affect velocity/centripetal acceleration? You know the centripetal force apparatus where you use a rubber stopper (rotating mass) and washers (hanging mass)? Yeah i am talking about that. I am wondering if the hanging mass and rotating mass affects the velocity. I looked for velocity calculators like this one

http://hyperphysics.phy-astr.gsu.edu/hbase/cf.html#cfc

but the Mass field doesn't state if it includes both hanging/rotating mass so i am confused.

2007-07-09 19:03:56 · 3 answers · asked by Vienna 3

2007-07-09 18:40:19 · 1 answers · asked by Anonymous

2007-07-09 17:36:56 · 3 answers · asked by Otep 1

I recently received a traffic violation for "Failure to stop a a stop sign". I was at a four way intersection when I made the turn. It was a narrow road and I am positive that I stopped at the stop sign. I believe If didn't stop my car would have crashed.Im INNOCENT! Does anyone know the formula for calculating this scenerio???

2007-07-09 16:19:40 · 4 answers · asked by College Student 3

I know that if you travelled faster than the speed of light that time would considerably slow down would it be possible to take a deep space trip and come back a little after you had left? Travelling at the speed of light? If doing said thing was possible

2007-07-09 16:05:37 · 4 answers · asked by Anonymous

2007-07-09 14:27:47 · 3 answers · asked by atomzer0 6

2007-07-09 14:09:17 · 8 answers · asked by Anonymous

Anyway it was about EgyptAir Flight 990 and basically the co-piolt who was homicial and sucidial plunged everyone to their deaths (this reason remains controversial) while the captain was in the bathroom. But anyway as they were plunging they reached zero G and everything was floating, I wanted to know what would u feel??? Then they reached twice the force of gravity and everyone was screaming it looked like they were ready to have a heart attack, but wouldn't you die from going so fast or would u be doomed to feel everything until the plane crashed on the ground???

2007-07-09 13:42:03 · 3 answers · asked by fanofdegrassi 2

Or does it explode ?

2007-07-09 13:24:13 · 15 answers · asked by Anonymous

I don't have a big enough centrifuge myself...

2007-07-09 13:13:42 · 9 answers · asked by Anonymous

I asked this in Woman's Health, but they had no clue.

2007-07-09 13:06:40 · 7 answers · asked by Anonymous

2007-07-09 13:04:55 · 10 answers · asked by ar2ch 1

The H-bombs can reach tempertures up to 200-300 million degrees celsuis. Why cant why create fusion reactors that can do the same?

2007-07-09 12:37:44 · 11 answers · asked by Anonymous

A horse is pulling a heavy cart up a hill. The cart has 400 kg of mass inside it. The horse is pulling the cart with 10 N of force. What is the magnitude of the force on the horse due to the cart?

2007-07-09 12:18:31 · 1 answers · asked by greg1545 1

standing 80 ft away.

Because of sidewise gust of wind 10 ft/s
the ball instead hit Mr. Thatcher's daughter Maggi
2 ft to the right of her father 1.0 second later.

What was initial horizontal velocity of the ball?

2007-07-09 11:05:54 · 2 answers · asked by Alexander 6

...and I journeyed with it 65 million light years away and pointed it back at the Earth, could I witness the cataclismic event that sparked the extinction of the dinosaurs? Could I watch the building of the pyramids? The crucifixion of Jesus? etc? I don't care how old I would be, or how I would breathe, or how I go to the bathroom, or any other physical or logistical issue.

2007-07-09 11:00:23 · 9 answers · asked by photonicboom 1

Let's just say the Earth is moving at 185,999 miles per second, and you shoot a laser in the same direction the Earth is already traveling, at what speed does the light from the laser move away from Earth?

2007-07-09 10:28:05 · 8 answers · asked by photonicboom 1

I mean, if the cop knows where I am, he can't know how fast I was going, and if he knows how fast I was going he can't know where I am....

2007-07-09 10:21:43 · 2 answers · asked by Anonymous

Theoratically speaking of course.


According to Einstein, I thought you could only travel forward in time, not backward.


Another question: How fast would one have to travel to time travel?


- 15 y/o freshman


spacebarisbroken. :(

2007-07-09 10:08:47 · 5 answers · asked by Anonymous

I haven't gotten mine yet! I'm sick and tired of doing everybody's homework for them and not getting any appreciation! Now people are getting free lightbulbs and I don't get one! YOU EXPECT ME TO KEEP GIVING GOOD ANSWERS ON HERE!?!?! NO! NO! NO! Not until I get my free lightbulb!!!

2007-07-09 09:17:19 · 3 answers · asked by Anonymous