when a new dry cell is connected in series with a 2.7ohm resistor a current of 0.5A flows in the circut determine its internal resistance

battery with hi vtge high val resist in series

so easy. just google the electromagnetic waves and it’ll pop up.

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.