Physics - February 2007

What would happen if a gnat travelling at the speed of light collided head on with a train moving 55 mph. Would there be any impact, damage, etc.?

2007-02-17 14:51:00 · 8 answers · asked by kcflds 2

2007-02-17 14:49:37 · 7 answers · asked by Anonymous

If a nuclear bomb hit Los Angeles how far would the blast spread and then how far would the dangerous amounts of radiation spred not including factors like wind and rain and stuff.

2007-02-17 14:41:52 · 7 answers · asked by Anonymous

to both an object that is slowing down but moving in the same direction AND an object that begins accelerating in the opposite direction? I realize I am a nitpicker, but science is all about being exact. Thanks very much.

2007-02-17 14:29:24 · 8 answers · asked by kmm4864990 1

This sound like a really odd questions but I really need to know.

2007-02-17 14:26:13 · 1 answers · asked by moon 1

COULD SOMEONE PLEASE HELP A DISABLED WAR VET WITH THE FOLLOWING I NEED HELP QUICKLY?

what is the frequency "in Mhz" of a beam of blue light whos wave length is 4000 angstroms

I know there is a simple formula for this question please help a veteran home back from Iraq after a 27 month tour get this figured out I need this help in getting into a vocationable rehap program and this question will be on a test I have to take please show me the formula of how you figured it and the answeer and it's up to me to remember it for monday at 0400 hrs when I take the test. I appreciate any assistance someone can give me so that I can see how it was calculated and what the final answer was and i'll drill it into my brain but I need the listed above information. Thank you in advance from a soldier who really appreciates the assistance of whomever took the time to help me help myself. It has been a hard transition and at this point I have no other source but to hope someone has the SOLUTION

2007-02-17 14:12:38 · 5 answers · asked by Wayne D 1

I have browsed through websites, checked other Yahoo! Answers about this particular question and what not, but I fail to really "Understand" this formula. It may be because I am but 13 years old but if some one could explain in further detail
"Energy equals mass times the speed of light squared."
(Which obviously is a huge number!)

2007-02-17 14:00:18 · 12 answers · asked by Naomi 2

1. An object needs to travel 17,000mph to reach escape velocity and orbit the Earth.

2. The further the orbit from the Earth, the lower the velocity needed to maintain that orbit.

3. Assuming I'm traveling in a small spacecraft that has minimal heat shielding, and that I can slow down once I'm in orbit, my question is thus:

At what distance would I need to orbit the Earth to enable a slow enough velocity, to allow me to re-enter the Earth's atmosphere without the speed that would cause me to burn up in the atmosphere?

In other words, I want to be able to slow down and enjoy the view, yet reenter the atmosphere safely. What is that distance and speed, please? I'm packing my bags now!

2007-02-17 13:27:26 · 4 answers · asked by roberticvs 4

What they are, Where do they come from, Who pilots them, What technology do they use?
When will the US gov't acknowledge them as real?

2007-02-17 13:18:10 · 8 answers · asked by Anonymous

where can i find a Van de Graaff generatorpre made and for no more than $50

2007-02-17 13:07:12 · 1 answers · asked by ying_yang121192 1

What is the weight of the Hubble telescpe at an orbt of radius 6.98X10^6 m as measured from earth's centre?

plz help?
-------
G= 6.67X10^-11Nm^2/Kg^2
r=6.38X10^6 m

2007-02-17 13:01:03 · 3 answers · asked by no name 1

Physics peeps, who claim to be able to mathematicly prove 11 dimentions, always seem to refer to time as related to but not the same as spacial dimentions. I have trouble accepting this.

If we are 3D, would we not at least pecieve the next (4th) direction in some extremely limmited way? Like, the way we do time. Could time not simply be the next higher direction of movement that we can not move through with any freedom, our sensing only it's most shallow (to use a lame 3D expression) surface?

2007-02-17 12:57:08 · 11 answers · asked by Anonymous

It's too complicated to explain, so here is a screenshot of the circuit:

http://s132.photobucket.com/albums/q40/diedrichknickerbocker/?action=view¤t=hwphys.jpg

Given the information in the picture, I need to determine the power delivered to resistor 2. I just want a push in the right direction, so don't worry about solving it for me.

2007-02-17 12:41:54 · 2 answers · asked by Anonymous

2007-02-17 12:37:40 · 6 answers · asked by einstein 1

Plz explain in easy to understand_terms

2007-02-17 12:33:36 · 5 answers · asked by Metus Ocultus 1

When propane burns in air 526.3 kcal/mol of heat is released to the environment. How many kcal of heat are evolved?

2007-02-17 12:32:38 · 2 answers · asked by Robert H 1

The specific heat capacities of two copper spheres are in the ration of 1:8. What is the ratio of their radii. ( Please also show working out) - whats the difference between mass and volume?

2007-02-17 12:27:21 · 4 answers · asked by Anonymous

How come there is radiation coming from from the electromagnective source and why?

2007-02-17 12:21:08 · 2 answers · asked by Metus Ocultus 1

find the weight of a 100 kg rugby player using both forms of the equation...

kk...so i got the equation...but when i do the calculation...i dunt get 980N....wth is wrong?

Fg=(Gm1m2)/r^2
Fg=(6.67X10^-11Nm^2/kg^2(5.98X10^24kg)(100kg))/(6.38X10^6m)^2

the anwers is suppose to be 980...but i get a way bigger answer...help?

2007-02-17 12:20:31 · 4 answers · asked by no name 1

3 charges are arranged in a triangle. A positive charge of 5 uC is placed at the origin. A - charge of 2 uC is placed 20 cm away in the 1st quadrant. A 3rd charge of 5 uC is placed in the 1st quadrant 8.75 cm away from the - charge. The angle from the original + charge to the - charge to the other + charge is 1.396 radians. What is the resultant force exerted on the third charge by the other two? So far, I have F13 as 12.83 N and F23 as 5.13N. I am trying to find the magnitude of F3. Am I on the right track?I would appreciate an expert's help on this one.

2007-02-17 11:36:32 · 2 answers · asked by RL 1

E=energy, c=speed of light, p=momentum, m=mass, v=velocity.
According to Relativity:
E=c*square root of(p^2+m^2c^2)
and p=(mv)/square root of(1-(v^2/c^2))
As speed increases toward the speed of light, momentum values reach infinity.
Any ways around this? (I have done the math, and I can't find any way!) Expain in details and formulas please!

2007-02-17 11:20:26 · 6 answers · asked by Evil Genius 3

Michael Jordan, formerly of the Chicago Bulls basketball team, has some fanatic fans. They claim that he is able to jump and remain in the air for two full seconds from launch to landing. Evaluate this claim by calculating the maximum height that such a jump would attain. For comparison, Jordan's maximum height has been estimated at about one meter.

2007-02-17 11:04:12 · 3 answers · asked by ..*Real-ality*.. 3

To believe the official story of 9/11 requires one to also believe the law of conservation of monumtum was violated. The Gov't has told us that the towers collapsed because of floors falling on top of one another all the way down, but this occured at virtually free fall speed (10 seconds) according to the 9/11 commision and others who have timed the collapse.

2007-02-17 11:00:28 · 7 answers · asked by Luke F 3

okay, so for my physics assignment i need to chose some sort of transportation... airplane, bicycle, etc etc.
i can also do a wheel, or something like that. anyways, i have to find "the physics connection" and make a 2-3 minute report on it.
i was wondering if you guys knew any good sites where i could find out what the physics behind any of those objects are?
i dont need you to explain to me, i just want some sites if you know any.
thanks!!

2007-02-17 10:34:55 · 1 answers · asked by Anonymous

A parachutist of mass 76.3 kg jumps out of an
airplane at a height of 1280 m and lands on
the ground with a speed of 4.16 m/s.
The acceleration of gravity is 9.8 m/s2 :
How much energy was lost to air friction
during this jump? Answer in units of kJ.

2007-02-17 10:30:41 · 3 answers · asked by kavita 1

The roller-coaster car shown in Fig. 6-41 (h1 = 30 m, h2 = 8 m, h3 = 28 m), is dragged up to point 1 where it is released from rest. Assuming no friction, calculate the speed at points 2, 3, and 4.

I can't copy and paste the drawing but here is a description of where the points are. Of course h1 would be at the top then the path of the roller coaster declines to point 2 (h2=8 m) and then the coaster assumes to point three which is back up to h3=28 meters.

Here is what I did to calculate the first speed.

v^2=square root of 2xgravityxheight. So......v^2=square root of 2x9.81x30 which = 24.26.

I am having trouble calculating speed 2 and 3 for point 2 and 3. Any help?

2007-02-17 10:00:54 · 5 answers · asked by Jessie L 2

Would time slow down or stand still?

2007-02-17 09:45:32 · 16 answers · asked by spamalot 1

Will the termnial velocity be the same,and will they accelerate to terminal velocity at the same rate?Will a falling bullet hurt you if droped from 5000 ft.?

2007-02-17 09:22:58 · 6 answers · asked by stangedagain2 1

What happens to light waves when they travel through a concave lens?

2007-02-17 08:53:03 · 3 answers · asked by koshbomb o 1

2007-02-17 08:39:00 · 3 answers · asked by ? 2