Physics - January 2007

2007-01-12 16:28:03 · 1 answers · asked by vijay p 1

2007-01-12 16:27:29 · 8 answers · asked by Doris J 1

speed of light ,speed of sound

2007-01-12 16:21:53 · 17 answers · asked by bush 1

a 68 kg crate is dragged with a massless rope at an angle of 15 degrees above the horizontal. if the coefficient of static friction is .5....what is the min. force required to start the rate moving. also...if kinetic friction is .35, what is the magnitude of the initial acceleration of the crate? Please help me!

2007-01-12 15:56:30 · 3 answers · asked by dqmiddleman 2

Okay the last time I asked this noone got it. Me and my friend think that we can put a real world object into a state that it can be moved electronically and put back into the real world. We start by scanning the object so that we have an exact model of it inside the computer. We were thinking about using an MRI but if you guys have a better idea please tell me. Then we turn the original object into energy for convienent storage. We were thinking about using lasers but please tell me if you have a better idea. Once the object is sent it is "Printed" out as an exact copy of the original item. Any one have any ideas on how to turn energy into an object that can be seen or held. Keep in mind we still have the original energy from the object. Do you think that this will work, and if you don't, do you have any suggestions on how it could be revised. And this is not a 3D print, I want to recreate the exact same object.

2007-01-12 15:50:19 · 12 answers · asked by Anonymous

I like this question. Nobody knows the answer but me.

2007-01-12 15:45:07 · 5 answers · asked by wwwwwwwfe 1

Me and a friend have a theory. We think that we know how to digitize things. We start by scanning an object using advanced MRIs to create an image of the object inside the computer. Then we use a laser to turn the object into energy to store for later printing. We don't really have a process for printing it but we are thinking about using a laser at extrememly low temperatures to reasemble the object from energy. Can you tell me if this will work and if the theory has a flaw, can you tell me how I could fix it?

2007-01-12 15:34:12 · 10 answers · asked by Anonymous

Ok, how much heat do you lose through your head? I always heard it was 80 percent, or in that neighborhood.

2007-01-12 15:22:57 · 5 answers · asked by Anonymous

i believe the center of the Earth would have to be Zero gravity,the ball would travel to the center if you dropped it in the other side as well..Think about it.

2007-01-12 15:17:33 · 17 answers · asked by overdriver64 3

2007-01-12 14:49:30 · 10 answers · asked by Me 1

2007-01-12 14:15:51 · 4 answers · asked by Anonymous

The ramp (picture link) is 18 meters long and 4.5 meters high.

*picture link: http://img206.imageshack.us/img206/2450/scangd4.jpg

a.What force, parrallel to the ramp (Fa) is required to slide a 25 kg box at constant speed to the top of the ramp if friction is disregarded?
b. What is the IMA of the ramp?
c. What are the real MA and the efficiency of the ramp if a parrallel force of 75 N is actually required?

Please help me with this problem.
I'm having trouble understanding it.

2007-01-12 14:01:19 · 2 answers · asked by vicky p 1

2007-01-12 13:58:54 · 1 answers · asked by C P 1

Which of these is not used to calculate change in thermal energy?

a) volume
b) temperature change
c) specific heat
d) mass

2007-01-12 13:51:54 · 4 answers · asked by James A 1

If the velocity of an object increases, the __ of the object will also increase.

It has to be on of these..im stuck what could it be? Is it A?

a) kinetic energy
b) mass
c) specific heat
d) potential energy

2007-01-12 13:48:27 · 6 answers · asked by James A 1

A student librarian lifts a 2.2 kg book from the floor to a height of 1.25 meters. Her carries the book 8.0 meters to the stacks and places the book on a shelf that is 0.35 meters above the floor. How much work does he do on the book?

I'm having trouble understanding this problem.
Please help me.

2007-01-12 13:34:04 · 2 answers · asked by vicky p 1

please do these problems wih explanation !!!!
1. a 10g bullet, traveling at 400m/s hits a 2kg block of wood & emerges going at350m/s. How fast does the blck of wood move after being hit?

2. a child throws, at 10 m/s, a 3.4 kg package, horizontally, from a boat. The boat weighs 60 kg and the child weighs 20 kg. If the boat was initially at rest, what was it's speed after the throw ?

2007-01-12 12:40:26 · 3 answers · asked by biowolf89 3

what causes the bubbles. It appears that air is escaping, but that cant be right. right?

2007-01-12 12:29:24 · 7 answers · asked by ken h 1

Light strikes the surface of a prism, (index of refraction) n = 1.9, If the prism is surrounded by a fluid, what is the maximum index of refraction of the fluid that will still cause total internal reflection within the prism?...the figure looks like a right triangle with the hypotenuse going from top left to bottom right. The light strikes the side of the triangle in the perpendicular, and it leaves the prism at an angle perpecdicular to the bottom line.

If you could please come up with an answer and even possible explain how you got it..that would be great!!!!! Thanks!

2007-01-12 12:23:25 · 3 answers · asked by Anonymous

what is the centripetal force acting on clothes spinning in a spin dryer

2007-01-12 12:21:20 · 3 answers · asked by shelly 3

This question is related to the pendulum.
THANKS

2007-01-12 12:09:05 · 1 answers · asked by sin90PRINCE 2

How do you increase the kinetic energy of a truck without changing its velocity???????

2007-01-12 11:33:51 · 6 answers · asked by kYM 2

2007-01-12 11:30:55 · 12 answers · asked by Anonymous

2007-01-12 10:34:29 · 11 answers · asked by ~XxRyanxX~ 1

2007-01-12 10:30:12 · 4 answers · asked by Anonymous

if a person survive the initial blast of a Hydrogen Bomb, will he/she get cancer or other health problem?

2007-01-12 10:28:21 · 2 answers · asked by Anonymous

Yes, say I am an alien and I have advanced knowledge about things and the ways of the Universe. Don't have the math, but know exactly how it works, will u pay for info?

-unification of quantum gravity + gravity

-explanation to dark matter + energy

-a gravity device that defies gravity and can modify gravity, showing other effects that would allow for sustainable energy on Earth that is unimaginable to you.

-some things about the Universe, such as how it came to be, the whole process--from the actual creation process to the process that lead to the evolved human, etc, etc. As well as advanced wisdom.

If you do, just give me a united response from a bunch of physicists, say---like Stephen Hawking and others...so I am absolutely sure you mean bussiness, and then I will reveal and we can start the exchange. My privacy is very valuable so that will also be of discussion and my email to email is 'tiberianfallout@hotmail.com'

2007-01-12 10:24:24 · 5 answers · asked by Anonymous

The 3 dimensions (x, y, z) allow for moving to any point within those coordinates. However, time has a restriction that it can only go forward. Unless someone determines that you can go to any point along the time dimension. How can time be considered a dimension?

2007-01-12 09:47:49 · 9 answers · asked by timespiral 4

by the way, it's african.

2007-01-12 09:33:48 · 6 answers · asked by Jake B 2

Suppose a baseball is shot up from the ground straight up with an initial velocity of 32 feet per second. A function can be created by expressing distance above the ground, s, as a function of time, t. This function is s = -16t2 + v0t + s0
•16 represents ½g, the gravitational pull due to gravity (measured in feet per second 2).
•v0 is the initial velocity (how hard do you throw the object, measured in feet per second).
•s0 is the initial distance above ground (in feet). If you are standing on the ground, then s0 = 0.
a) What is the function that describes this problem?
Answer:




b) The ball will be how high above the ground after 1 second?
Answer:
Show work in this space.




c) How long will it take to hit the ground?
Answer:
Show work in this space.

2007-01-12 09:20:38 · 2 answers · asked by gizmo49250 1