NTNUJAVA Virtual Physics Laboratory
Enjoy the fun of physics with simulations!
Backup site http://enjoy.phy.ntnu.edu.tw/ntnujava/

JDK1.0.2 simulations (1996-2001) => kinematics => Topic started by: sakuralim on July 04, 2005, 09:04:11 pm



Title: Physical Quatities and Units
Post by: sakuralim on July 04, 2005, 09:04:11 pm
Hi everyone ^^  :D
I am very weak at physics, so I hope that someone may help me with these questions

1.  The frequency f of the note produce by a streched string depends on its length l the tension T of the string and the mass per unit lenght m of the string. Use the method of dimension to derive an equation for f.




Title: topic221
Post by: Fu-Kwun Hwang on July 05, 2005, 09:19:30 am
Because the question assume frequency f depends on  tension T, length L and mass per unit lemgth m

Assume the relation is f= TaLbmc
The dimsnsion must be the same on either side of the equation

Dimension for f is 1/t
Dimenswion for T is M L /t2, dimension for m is M/L
 1/t = (M L /t2)a Lb M/Lc=Ma+cLa+bt-2a

so -2a=-1 , a+c=0 and a+b=0


Title: thanks ^^
Post by: sakuralim on July 05, 2005, 09:21:23 pm
thank you HWANG for helping me out.
Now I can understand a little bit. ^^


Title: topic221
Post by: johnza on August 27, 2005, 01:15:00 pm
i am teacher of physics thanks


Title: Re: Physical Quatities and Units
Post by: Edward Collin on December 08, 2010, 10:59:20 am
I am also a physics student upto high school, but have never been able to catch these solution. Now I wish to do Bachelor in science, this is somehow helpful for me.