# Search results

1. ### 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...
2. ### 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...
3. ### 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...
4. ### 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...
5. ### Physics literature

I'm currently a student in high school taking AP Physics and I'm interested in a book that would contain problems and detailed solutions to each problem. Please give me some recommendations to what book(s) I should look into.