1. Qual o módulo do campo elétrico gerado por uma carga elétrica de 0,2pC, no vácuo, a uma distancia de 30 cm?

Aproton is projected toward a fixed nucleus of charge +ze with velocity vo. initially the two particles are very far apart. when the proton is a distance r from the nucleus its velocity has decreased to 1/2vo. how far from the nucleus will the proton be when its velocity has dropped to 1/4vo?

Which is not an example of how an object gains elastic potential energy by stretching? a. jumping on a pogo stick b. pulling on a rubber band c. jumping on a trampoline

Acar travels 40m in 8 seconds find the car speed