An electric iron of resistance 20 Ω takes a current of 5 A. What is the voltage across the iron? *

1. how to locate the image in converging(concave) mirror and diverging (convex) mirror with salt. 2. how to locate the image in a converging (convex) lens and diverging (concave) lens with salt.

Am i correct on these two physics questions?

What is the moment of inertia i of this assembly about the axis through which it is pivoted? express the moment of inertia in terms of mr