Physics - October 2006

A train, traveling at constant speed, takes 20 seconds from the time it first enters a tunner that is 300 meters long until it completely emerges from the tunnel. one of the stationary ceiling lights in the tunnel is directly above the train for 10 seconds. Find the length of the train.

2006-10-11 15:38:29 · 2 answers · asked by globesk8er999 1

2006-10-11 14:47:37 · 10 answers · asked by riverratbliffen 1

2006-10-11 14:45:31 · 6 answers · asked by Anonymous

or does it depends on something else also?

2006-10-11 14:35:26 · 5 answers · asked by hypnonebula 3

I'm doing a report on coulomb's law where i had to examine the changes in distance of 2 spheres as the force between them increased. Then we had to make some graphs of Force vs Distance and then Force vs. (1/Distance)^2. i don't know how to sum all that up in a problem statement when the main focus is on how the graphs came out. Plz help.

2006-10-11 14:27:44 · 3 answers · asked by crazed1511 1

help please. (:

2006-10-11 13:57:32 · 2 answers · asked by Anonymous

A particular particle has mass-energy 494 MeV and decays in 1.2 x 10 ^ -8 s in its rest frame. What is the enrgy in the frame of the lab if it travels 10.0 m before decaying?:

2006-10-11 13:54:20 · 2 answers · asked by Prince Of Troy 2

2006-10-11 13:51:33 · 7 answers · asked by waynes world 1

I am doing a project for science. I need to find 20 products from my house that have one elements from the perodic table like iron, calcium, lithium, berylium, carbon, silicon, argon, neon, cobalt, lead, etc... I need to do this project by October 16, 2006. I need to do the project on 20 different elements. I have looked every where for elements but I cannot find any in the ingredients of the products. The product can be the pure sample of the element, compound, or mixture. My teacher prefers for the product to be pure. I need label as evidence that the product does have the element. I would really appreciate your help.

2006-10-11 13:28:46 · 5 answers · asked by ? 2

I have been taught not to include it as a force on a free body diagram.

2006-10-11 13:19:54 · 5 answers · asked by cdreed3000 1

What propels objects forward?

2006-10-11 13:13:44 · 10 answers · asked by cdreed3000 1

2006-10-11 12:52:09 · 12 answers · asked by allanziegler 1

My understanding is the excitation of atoms in gas is involved in producing the lasing effect. I also know that different lasers use different types of gas. What gas, when used in a laser would produce a purple color?

2006-10-11 12:51:31 · 3 answers · asked by mitigate stupidity 2

My physics teacher is pretty difficult to understand things from her, and I was wondering if anyone would like to explain things a little better to me?

Looking for some simple explaination of magitude, components, and displacement of vectors.

Thank you!

2006-10-11 12:31:53 · 2 answers · asked by Anonymous

copper, zinc, magnesium ribbon, gold jewellery, aluminum foil, penny?

2006-10-11 12:26:06 · 4 answers · asked by ghettoco 1

Roller coaster cart is stationary at a point off the ground 24.5 m (h1). Later when on a different hill (h2) it is 24.5 m from the ground. What is the potential energy of the cart at h1 relative to the ground? Acceleration of gravity is 9.8 m/2^2.

Is the h2 info thrown in to confuse the problem, or is it somehow needed to solve?

2006-10-11 12:20:56 · 3 answers · asked by Anonymous

2006-10-11 12:18:17 · 8 answers · asked by Gregory D 1

2006-10-11 12:17:22 · 4 answers · asked by robert h 1

my boy bought a truck with a cap and i say it uses more gas! he said it saves on fuel someone please help

2006-10-11 11:48:06 · 4 answers · asked by mike f 1

A 1563.4 kg car is traveling at 25m/s when the driver takes his foot off the gas pedal. It takes 4.9 s for the car to slow down to 20m/s. How large is the net force slowing the car ? Answer in units of N.

2006-10-11 11:36:24 · 2 answers · asked by Anonymous

if i climded a rope to space i could get to space/orbit w/o ever attaining escape velocity....couldn't I? what does escape velocity refer to then?

2006-10-11 11:25:24 · 4 answers · asked by akamadscientist 1

2006-10-11 11:18:56 · 4 answers · asked by Jennifer A 1

Gymnast mass is 57.0 kg
vertical rope
ignore weight of the rope and assume the rope doesn't stretch

2006-10-11 11:17:19 · 2 answers · asked by Anonymous

2006-10-11 11:06:42 · 7 answers · asked by Anonymous

Airplane flight recorders must be able to survive catastrophic crashes. Therefore, they are typically encased in crash-resistant steel or titanium boxes that are subjected to rigorous testing. One of the tests is an impact shock test, in which the box must survive being thrown at high speeds against a barrier. A 41 kg box is thrown at a speed of 180 m/s and is brought to a halt in a collision that lasts for a time of 5.2 ms. What is the magnitude of the average net force that acts on the box during the colision?

2006-10-11 10:38:07 · 2 answers · asked by DK 1

A 110kg box, starting from rest, is pulled across a floor with a constant horizontal force of 350N. For the first 15m the floor is frictionless, and for the next 15m the coefficient of friction is 0.30. What's the final speed of the box?

2006-10-11 10:38:00 · 2 answers · asked by Anonymous

according to stephen hawking's books, once the unified field theory is found, then the future could be predicted. therefore everything is predetermined, and that we don't have any free will. is scientific determinism possible?

2006-10-11 10:34:59 · 10 answers · asked by Anonymous

http://i21.photobucket.com/albums/b272/Cajunboiler/PHYSICSHELP1.gif

A cable is lifting a construction worker and a crate, as the drawing shows. The weights of the worker and crate are 953 and 1550 N, respectively. The acceleration of the cable is 0.620 m/s2, upward.

(a) What is the tension in the cable below the worker?

(b) What is the tension in the cable above the worker?

2006-10-11 10:33:01 · 1 answers · asked by Confused 1

is it because with turbulence the system gets complicated? if possible, please give some refenrence to your answer.... I am really trying to understand here....

2006-10-11 10:27:05 · 2 answers · asked by AsiH 3

What products have elements from the perodic table like iron, copper, silver, sodium, lithium, magnesium, etc...
Products that are found at home. i need samples that have pure samples of elements or compound or mixture.

2006-10-11 10:12:51 · 3 answers · asked by ? 2