Physics - October 2006

i begin to study physik this year in germany and i want to get to know physic students all over the world may be to discuss about physics, or to get to know other people, it does not matter.

2006-10-26 00:49:26 · 7 answers · asked by letzterose87 1

2006-10-26 00:32:34 · 2 answers · asked by ravi 1

A small block is held in place against a rough wall by someone pushing on it with a force directed at 22° above the horizontal. The coefficients of static and kinetic friction between the box and wall are 0.4 and 0.3 respectively. The box slides down unless the applied force has magnitude 13 N. The mass of the box is

2006-10-25 23:54:26 · 2 answers · asked by 3ajeeba_q8 2

Why do we as a society confuse our people by allowing our astronauts to refer to outer space as zero gravity, when it in fact is only a reduced Gravity state of existence.

As I see it, with all of the billions upon billions of dollars which we have spent in Astronomical Space research, we must now know for a fact that all matter attracts other particles with in space with respect to gravitational forces, therefore space is not zero gravity, even though it may feel as such to the astronauts with respect to their very primitive and basic observations.

It is only with respect to combined matter density of any object, and distance from each object in question in which less dense particle matter objects will observe reactive responses by the more dense particle matter objects.

Thus gravitational attraction is vacuum energy acceleration through particle matter which functions with direct respect to Universal linear expansion in all directions.

And Zero Gravity is extremely Rare and has never been observed.

2006-10-25 23:46:50 · 11 answers · asked by Thoughtfull 4

a. Find the magnitude of the acceleration of the block
b. Find the coefficient of kinetic friciotn between the clock and the incline?
c. FInd the magnitude of the frictional force acting on the block?
d. Find speed of the block after it has slide 2.00m?

2006-10-25 23:34:45 · 1 answers · asked by lauren u 1

jayesh_1232007@yahoo.co.in

2006-10-25 23:34:10 · 4 answers · asked by jayesh_1232007 1

Reachs a speed of 7.0m/s^2 at the bottom of the hill
Coefficient of kinetic friction between sled + girl and hard icy snow 0.050, the total weight of the sled + girl = 645N.

2006-10-25 23:30:59 · 4 answers · asked by lauren u 1

2006-10-25 23:26:18 · 7 answers · asked by pavan kumar NC 2

Help me!!!

2006-10-25 23:03:06 · 2 answers · asked by Bomer 1

A novice polot sets a plane's controls, thinking the plane will fly at 250 km/h to the north. If the wind blows at 75 km/h toward the southeast, what is the plane's resultant velocity?

2006-10-25 22:03:23 · 7 answers · asked by Some Guy 2

i need any new information about semiconductors manufacturing, its my new reasearch subject....thank you for your time

2006-10-25 21:52:44 · 2 answers · asked by jack 1

2006-10-25 21:16:02 · 9 answers · asked by laimanho 1

a cyclist is coasting at a steady speed of 12m/s but enters a muddy stretch where the effective coefficient of friction is 0.60. The muddy stretch lasts for 11 m. What is the cyclists speed upon emerging from it.

2006-10-25 21:04:59 · 4 answers · asked by 3ajeeba_q8 2

A person weighing 200N sits on a sled and is pulled 75m horizontally at a constant speed by a force of 100N acting on the sled at an angle of 30 degress to the horizontal. What is the amount of work on the person by the vertical component of the 100 N force? Why is this true?

2006-10-25 19:51:17 · 1 answers · asked by Cin 1

the wt of other body may be greater than the wt of the body exhibiting force

2006-10-25 19:49:01 · 4 answers · asked by deepu h 1

physics

2006-10-25 19:43:31 · 5 answers · asked by raman mishra 1

2006-10-25 19:41:18 · 3 answers · asked by Anonymous

A missle being launched reaches a vertical velocity of 100m/s when the rocket engine shuts off. To what additional height will the missle go before it stops going up and falls back to Earth?

2006-10-25 19:07:56 · 3 answers · asked by Cin 1

I was doing a search on time travel & I came upon an online document which was a 3 part story about 2 guys in canada, and using "power points" or some such to time travel. In short, the story at the end had said that the one man traveled ahead to 2010 or 2012, not exactly sure. He then says in the story that he tried to travel past the year 2012 and could not, like some strange force was restricting him from going further. I don't remember details on this, but I do remember him saying he did something, but I don't remember what that something was, and he got past 2012, and nothing was there. I told my brother this, and he said, yea, according to the Mayan calendar 2012 is the date. This shocked me cause I had no clue about this Mayan calendar thing. Below is a link for reference.

http://mysite.verizon.net/resoxkyi/theyear2012scam/id36.html

It's funny as to how people just totally dismiss anything they feel is totally fake, when there could be plausibility to it.

2006-10-25 18:44:35 · 6 answers · asked by twiigss 4

2006-10-25 18:43:33 · 4 answers · asked by Random is my passion 4

for example:

Given the vectors
A = 2i - 3j and B = 4j - 5k, calculate A x B

please help me, thanks

2006-10-25 18:32:23 · 1 answers · asked by Anonymous

It took the braking force of 1000 Newtons a distance of 50 meters to stop a car. What was the kinetic energy of the car before the braking was started?
Explain answer please.

2006-10-25 18:03:02 · 6 answers · asked by ??? 2

Imagine a frictionless pulley (a solid cylinder) of unknown mass M and radius r = 0.200 m which is used to draw water from a well. A bucket of mass m = 1.50 kg is attached to a massless cord wrapped around the pulley. The bucket starts from rest at the top of the well and falls for t = 3.00 s before hitting the water h = 9.99 m below the top of the well.

(i) What is the angular velocity of the pulley when the bucket hits the water? (use the relation between the angular velocity and the linear velocity)

(j) What is the angular momentum of the pulley when the bucket hits the water? (use the moment of inertia and the angular velocity of the pulley)

(k) What is the kinetic energy of the bucket when it hits the water?

(l) What is the kinetic energy of the pulley when the bucket hits the water?

(m) What is the total kinetic energy of the system when the bucket hits the water?

Is the total kinetic energy smaller, equal to (within +/- 1%), or larger than the potential energy change?

2006-10-25 17:16:49 · 2 answers · asked by Anonymous

2006-10-25 17:13:55 · 11 answers · asked by tigerlily 1

2006-10-25 16:54:37 · 19 answers · asked by elliejay21 2

If the small block has mass m=10kg, find the mass M of the larger block to give the smaller block an upward acceleration of 3 m/s2
.......O
.....|....|
._|_.._|___
|__|..|____|
S........L

*sorry my drawing sucks...

2006-10-25 16:46:06 · 3 answers · asked by chris p 3

A ball having a mass of 150 g strikes a wall with a speed of 5.2 m/s and rebounds with only 50% of its initial kinetic energy. (a) What is the speed of the ball immediately after rebounding? (b) What is the magnitude of the impulse on the wall from the ball? (c) If the ball was in contact with the wall for 7.6 ms, what is the magnitude of the average force on the ball from the wall during this time interval? Can you explain how you get your answers?

2006-10-25 16:43:23 · 1 answers · asked by Anonymous

An ice skater of mass m is given a shove on a frozen pond. After the shove she has a speed of v_1 = 2 m/s. Assume that the only horizontal force that acts on her is a slight frictional force between the blades of the skates and the ice.

Use the net work-kinetic energy theorem to find the distance the skater moves before coming to rest. Assume that the coefficient of kinetic friction between the blades of the skates and the ice is u^kin = 0.12.

2006-10-25 16:36:43 · 3 answers · asked by Anonymous

this weight.
A. Calculate the power produced in lifting this weight to that height.
B. Calculate the potential energy of this weight at the maximum height
C. Calculate the kinetic energy of this weight just before impact on the ground.
D. Calculate the velocity of this weight just before impact.
any help with these will be greatly appreciated.

2006-10-25 16:31:38 · 4 answers · asked by j a 1

A ball having a mass of 150 g strikes a wall with a speed of 5.2 m/s and rebounds with only 50% of its initial kinetic energy. (a) What is the speed of the ball immediately after rebounding? (b) What is the magnitude of the impulse on the wall from the ball? (c) If the ball was in contact with the wall for 7.6 ms, what is the magnitude of the average force on the ball from the wall during this time interval? Can you explain how you get your answers?

2006-10-25 16:17:40 · 1 answers · asked by Anonymous