Physics - December 2006

magnetic flux doesnt make any sense to me,wat is exactly magnetic flux? some says it is the magnetic field strength times surface area that is proportional to the magnetic field. some says it is a property that takes magnetic field and extent of field into account. when i was doing questions, flux always appears,but i dont understand wat it really is.
chhers

2006-12-16 12:16:48 · 5 answers · asked by Anonymous

An 800kg car is at the top of mount wellington ( at a height of 1270m). if the car were allowed to roll down the mountain without the use of any brakes, how fast would the car be travelling when it reaches seal level? There is a coefficient of (dynamic) friction of 0.01 between the road and the car on the way down the mountain.

please help me...if u can explain how to do it that'd be a great help..10 points for best answer
thanx

2006-12-16 12:15:10 · 3 answers · asked by bobby19_9 1

2006-12-16 12:09:37 · 6 answers · asked by Tay 1

a train locomotive (m=23500) pulling 3 identical cars accelerates at 0.225m/s^2.

a)what force does the first car pull on the second (no friction)

b) if the friction on each car is 1100N, what must be the force that the locomotive exerts against the rails?

2006-12-16 11:54:25 · 3 answers · asked by Anonymous

2006-12-16 11:15:50 · 2 answers · asked by bhangraking777 1

I was researching the vomit comet and how it simulates weightlessness. It follows a path called a Kepler curve (i couldn't find anything on this, but as far as i can tell it is a parabolic shape.) but, basically the plane accelerates downwards and upwards at certain angles to create certain G forces. i was wondering how do you calculate Gs using angles. Ex. the plane accelerating downward at a 45 degree angle versus a 30 degree angle. Thanks for your help!

2006-12-16 11:00:38 · 3 answers · asked by Emily 1

A 140 N block rests on a table. The suspended
mass has a weight of 69 N.

What is the magnitude of the minimum
force of static friction required to hold both
blocks at rest? Answer in units of N.

What minimum coeffcient of static friction
is required to ensure that both blocks remain
at rest?

2006-12-16 10:39:50 · 2 answers · asked by TheThing 2

The coeffcient of static friction between the
3.99 kg crate and the 34 degree incline is 0.336.
The acceleration of gravity is 9.8 m/s^2 .

What minimum force F must be applied to
the crate perpendicular to the incline to pre-
vent the crate from sliding down the incline?
Answer in units of N.

2006-12-16 10:38:31 · 1 answers · asked by TheThing 2

2006-12-16 10:12:40 · 5 answers · asked by Mary Jane 2

Quantum mechanics explanations always seem to talk about probabilities as if they were real things instead of just observations of what the universe is actually doing. Is there an accepted QM theory that tries to explain things by proposing a sea-like background in the universe?

For instance, if you spill some oil on the surface of the ocean then in some ways it may seem like one thing or many things. Measurements would constantly vary because the ocean is always moving and shifting, yet the spill will more or less stick together (at least for a while).

If space-time is constantly moving (sort of like the ocean) and if particles are sort of like oil spills (both waves and particles) then couldn't that be a basis for an explanation of QM that Einstein wouldn't dislike?

It seems like this is so obvious that it must be wrong. Why isn't it correct?

2006-12-16 10:08:37 · 4 answers · asked by HappyEngineer 1

2006-12-16 09:39:27 · 4 answers · asked by Jose C 1

2006-12-16 09:38:44 · 1 answers · asked by Jose C 1

How much work is done by the person while going from the position 1 to position 2? See the picture for details

http://www.geocities.com/jsjm61/questionForWork.JPG

Thanks

2006-12-16 09:22:06 · 2 answers · asked by ___ 4

2006-12-16 09:06:01 · 11 answers · asked by Michael 2

if a certain automobile of mass 1520 kg travels on a german autobahn at 210 km/h. what is the wavelength of the automobile in m?

2006-12-16 07:26:07 · 3 answers · asked by Anonymous

I suspect there are many serious errors in this book, but also much
that is important and true. She usually references sources which are, to say the least, not very authoritative. Your mission is to seperate the true from the false - give examples of errors.

2006-12-16 06:46:43 · 1 answers · asked by warren_d_smith31 3

This question is more for teachers or college profs. Through high school and college in just about all my labs: chem, physics, bio I remember blatently cheating experiments so that I could get some realistic info on my lab sheets. It got to the point to where I just got sick of doing labs because nothing ever worked out and I knew I would just fabricate data to make it look good. Do you think this happens often? And if so are our lab courses really teaching our generations of scientists to "fake it"? To this day I found all my undergrad labs were a waste of time.

2006-12-16 06:42:07 · 2 answers · asked by travis R 4

for electricity to flow, you need a voltage. so how does the neutral wire, which has no voltage, have an electricity flowing through it? thanks!

2006-12-16 06:29:44 · 11 answers · asked by drammogan 1

I just watched the Denzel Washington movie 'Deja Vu' one of the scientists in it said a process involving time travel was PHYSICALLY IMPOSSIBLE - even theoretically - and yet it worked because the two men believed in God.

Have any scientists witnessed any miracles in the lab with physical laws being broken down? I think maybe all we need to do is pray and God will rescind all physical laws for decent white christian folk. Any miracles in the lab been observed?

2006-12-16 06:22:20 · 9 answers · asked by Anonymous

2006-12-16 06:16:07 · 2 answers · asked by SHANIZ AZEEZ 1

can any one.. please help me.. n tell me how the strength of the electromagnet is calculated...???i want to make elcetromagnet which can generate electric field around it of abt 1-2meters n can hold abt few kgs.. of weight(1lb is approx. 0.5 kg)..??also which metal i can use..?plz... help me...????

2006-12-16 05:39:28 · 3 answers · asked by dadhichi s 1

I was wondeing if you could tell me what lowers the surface tnsion of water and anything you find on a website could you please list the website thanks so much

2006-12-16 05:36:02 · 6 answers · asked by Anonymous

Star Trek's "warp drive" or Battlestar Galactica's "FTL jump"

2006-12-16 05:32:32 · 6 answers · asked by By Your Command 6

Does the weight of the planet (Earth) ever alter?????....... e.g if someone cuts down say 1000 huge trees & burns them or 2000 jetliners are in the air at any one time, does the weight of the planet then increase when they land again??

2006-12-16 04:55:25 · 9 answers · asked by Anonymous

2006-12-16 04:52:26 · 7 answers · asked by ♣♠The Boss♠♣ 3

2006-12-16 04:51:12 · 2 answers · asked by hash 1

i want to know - "current is a scalar quntity or vector quntity and how????????"

2006-12-16 04:05:03 · 12 answers · asked by Anonymous

2006-12-16 03:50:11 · 8 answers · asked by Anonymous

Imagine that a new asteroid is discovered in the solar system with a circular orbit and an orbital period of 5 years.

What is the average distance of this object from the sun in earth units? Answer in units of AU.

If you could please show me how to do it, it would be greatly appreciated.

2006-12-16 02:58:22 · 6 answers · asked by PHYgirl 1

Alright guys,

Ive always been fascinated with the science and physics realm of things, although most of the time i dont understand the concept of alot of scientific truths and theory's yet i still like to exercise my mind to try and understand it.

But the thing that ive been trying to get my head around lately is E=MC2 and i have watched a short movie about it and have a limited understanding as to what it means, but not a full understanding. I know that energy can be turned into matter and matter into energy and the more momentum something has the more heavier and powerful it becomes....squared.

Is there anyone who understands this equation in depth and if so can u try to explain in simple terms?...so that i might be enlightened as to something that is very relative?

Thanks

2006-12-16 02:52:38 · 17 answers · asked by michael_wheeler1 1