What is the current in a parallel circuit which has two resistors ( 17.2 ohms and 22.4 ohms ) and a power source of 6.0 volts?

Consider a system to be two train cars traveling toward each other. what is the total momentum of the system before the train cars collide?   kg • what must the total momentum of the system be after the train cars collide?   kg •  

Which of the following situations is impossible? a) an object has velocity directed east and acceleration directed east. b) an object has zero velocity but non-zero acceleration. c) an object has constant non-zero velocity and changing acceleration. d) an object has velocity directed east and acceleration directed west. e) an object has constant non-zero acceleration and changing velocity.

Amagnetic field applies forces on: a)static chargesb)moving chargesc)water flow