PLEASE HELP

What is the current (in A) through the 4-V battery in the circuit below?

Asap and show ! a 14 kg rock starting from rest free falls through a distance of 5.0 m with no air resistance. find the momentum change of the rock caused by its fall and the resulting change in the magnitude of earths velocity. earth mass is 6.0 * 10^24 kg. show your work assuming the rock earth system is closed.

Explain why electric current cannot exist if a current doesn't have a voltage source.

70 give a real life example showing how sensory neurons work with the motor neurons