# Recent content by AARMA

1. ### Expressing functions [word problems]

paulfr + symbolipoint, these word problems are not from the book but rather were given to us from the professor as a worksheet. the diagrams were drawn by him... For the rectangular package diagram i, myself, got confused with the variable correspondence for each side... Now, however, i...
2. ### Expressing functions [word problems]

[PLAIN]http://rghost.ru/22429021/image.png [Broken] paulfr, can you help me with this one? here's the picture [quickly made it in Photoshop (dont critique :))] the part i dont understand is: 108 = 2*x + 2*y ---> why are we doing this? And please, can you give some reference where i can...
3. ### Expressing functions [word problems]

paulfr, well, in my personal opinion, public education in US is very weak and does not provide the very needs (the basics) for higher education.. As my college professor says forget everything that you have been taught in high school; high school is like 12 years of horror, but this is college...
4. ### Expressing functions [word problems]

symbolipoint problem is i dont understand where are you getting that Radius = \frac{\pi }{2}.. the questions you're asking me im kinda of lost :)
5. ### Expressing functions [word problems]

symbolipoint i have no idea where are you getting the formulas and/or how are you setting up the equation the way you did?
6. ### Expressing functions [word problems]

Could somebody help me understand the process of solving these problems because I don't even know where to start... Also, could someone provide a link to a site where I can practice more of these type of problems. 1) Homework Statement : A rectangular package to be sent by a postal service can...

8. ### Electricity and Magnetism homework

thanks for the explanation... I also have two other problems that I'm really not sure about. If you could explain them to me I would really appreciate it. Homework Statement Two long parallel wires separated by 4.0 mm each carry a current of 24 Amps. These two currents are in the same...
9. ### Electricity and Magnetism homework

thanks for the reply... i just tried solving the two problems and qvb=qE so then I set the first problem up like this: 1.6\times 10^{-19 } \textup{ C }\times V \times 8^{-3}\textup{ T} = 1.6\times 10^{-19} \textup{ C}\times 4000\textup{ V/m} I also have a question about this... Don't we...
10. ### Electricity and Magnetism homework

Homework Statement What is the Kinetic Energy of an electron that passes undeviated through perpendicular electric and magnetic fields if E = 4.0 kV/m and B = 8.0 mT? m_{e} = 9.1 \times 10^{-31} \textup{kg} q_{e} = 1.6 \times 10^{-19} \textup{C} Homework Equations I got stuck doing...
11. ### Rotational dynamics

can someone explain with his own words.. :)
12. ### Rotational dynamics

In a class demonstration, a bicycle wheel was held on an axle and spun. The result came to be that the wheel while rotating held a vertical position while holding it by a string attached to the end of the axle. After the wheel stopped rotating its vertical position ceased and the wheel attained...
13. ### Two equations for centripetal acceleration

Thank you for the help. This is what I wrote for my extra credit on a test and got only +1 The reason why centripetal acceleration (Ac) is inversely related to radius (r) in the equation: Ac = V2/r and directly related to the radius in the equation: Ac = 4pi2r/T2 is because in the first...
14. ### Two equations for centripetal acceleration

Dadface Can you please elaborate on that explanation.. can you go more in depth, I really want to understand.
15. ### Two equations for centripetal acceleration

My question is how can Ac (centripetal acceleration) be both inversely related to radius and directly related in two equations: 1) Ac = V2/r 2) Ac = 4pi2r/T2 In the first equation Ac is inversely proportional to radius in the second one Ac is directly proportional to radius. Why and how is...