Easiest answer to the magnetic field question is the poles of the magnetic field are closest in a U shaped magnet. The closer the poles are the stronger the magnetic field since it doesn't spread out much due to distance.

the magnetic field overlap in U shaped?

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Added on June 25, 2009, 2:34 pmIs a current carrying conductor an electromagnet? not winded with selenoid one

This post has been edited by vick5821: Jun 25 2009, 02:34 PM

Wah, very hard to find malaysians who like this stuff

I don't take physics, but I'm interested in it.
I do maths, including some geometry, topology and functional analysis.
So cannot run from physics application la.
PDEs, Tensors, Hilbert/Banach Spaces...mostly QM related material
Sometimes it's very hard tho, makes me wanna krai

Can't do physics papers because they have like 3-hour labs, NOT FUN.
Unfortunately don't have physics friends to talk to about all this stuff(no maths friends either lol)
Well...malaysian friends anyway.

Well depends on what you do in the 3-hour labs. I personally enjoyed the 3-hours labs of physics in my engineering course in monash university.

This would be a good place to discuss physics, this thread in particular. As it focuses more on the theory, it doesn't really stray afar compared to other threads that were in this section.

Sorry..i am facing problem in physic,.. hope someone can help me >>.<
Thanks
this is the question
The speed of waves in deep water depends only on the gravitational acceleration g, with dimensions and on the wavelength , with dimension L Derive an equation for the speed of wave in deep water, v .

Hi everybody !

It's so nice to see REAL physics alive and kicking ! With that, I meant hot physics stuffs such as relativistic and quantum stuffs, cosmology, ....those modern physics stuffs that we don't learn in school !

Unfortunately, like what have been mentioned earlier, physics were not given its due coverage in Malaysia. Every year, corporate companies bring in Nobel Laureates to give talk...but in what field ? Economy, Peace etc....but not Physics !!! The only one or two which ever made public was Stephen Hawking's talk and the one given by Jocelyn Bell Burnell (my first attendance to a talk be a world famous astrophysicist)

I hope this forum can continue to grow. Keep it growing, guys and gals !

Hi, all ! Its been months since i surf in LYN forum but only today , i found out there is an interesting section in here. I've never thought there is a section in a forum in Malaysia.

I came to like Physics when im around 15 or 16. Well, I like to read those articles about how Physics laws are being applied in new technologies being introduced to the world.

I thought of studying Physics after SPM, but sadly due to objections from parents ( u know lah, hard to find job, and my parents always have the perception that physicists are always loner , bla bla bla) so instead, im now taking Computer Studies.

Anyways, keep up the good work of keeping this section alive. Looking forward for more topics (:

Regards.

which book u guys find out good for MODERN PHYSICS or QUANTUM MECHANICS??

its really sad to know that quantum physics and many other topics is only taught in postgraduate level. theres so much mysteries to what i'm currently learning now in spm level. we seriously lack exposure to practical physics in malaysia.

Ya basically all the physics learn during secondary school is exam-orientated..juz teach u how to score..but not really try to create an interest in physics among students

I'd argue that SPM level physics has too much of practical physics instead of theoretical ones

Agreed,but still,theoretical physics is much tougher.

Even things like fluids mechanics is too much for a high school student.I really doubt a typical high school student will know how to use Bernoulli's Equation.

Soil mechanics is just absolutely horrible. Whole lot more fun than usual mechanics,though.

Borrow book from Uni or library and make your own study..

i doubt they overlap. they r basically just condensed and put nearer to each other, in other words.

i dont think so. can someone plz help to explain this ?

Hi guys I've always loved physics but after reading lots of texts and materials on it I still believe I have an incomplete understanding of the beautiful subject. However, I have taught students from form 4 right to foundation level Physics at university and I feel I definitely can identify the common problem areas for students. I also take a holistic approach to physics which simply means I teach using experiences u already have to make u understand Physics. So if any of you high school or Pre-U students have queries please don't hesitate to ask. I will help or at least point you in the right direction:)

OH, all Physics student here? Hi thar.. I like physics too when in SPM.. lol..

I've got a projectiles question here


A ball is thrown upward from the top of a building with an initial velocity of 70m/s at an angle of 35 degrees above the horizontal. Given that the height of the building is 65m.
Calculate the time for the ball to reach the ground.

My answer is 1.385s.

I hope that i do it right otherwise i will have my scholarship withdrawn and needed to pay an extra RM840.

Thanks for the help

I got 9.57s wor >_< not sure mine correct a not also

It would be easier if you show the steps that you've used to come up with that number and what is the value for g that you have used in your calculation.

You would need to find out how high the ball will get based on the launch parameters. It's not going straight up so you will need to use trigonometry to get the vertical component of the velocity. This information will provide the time it takes for the ball to go up and stop and the additional vertical distance traveled upward from the top of the building. With the new height and the height of the building, figure out how long it takes for the ball to fall to the ground. Add the time for the ball to go up and stop and the time to fall from its new height to get the total travel time.

This post has been edited by Eventless: Sep 14 2009, 03:33 PM

actual answer is 9.57s,i did not understand the question fully ,that is y i got 1.385s