What should be found when size of image is asked in a lens or mirror question

Excuse ! extra points plus ! super desperate ! the position of an object does not move relative to a reference point. relative to the reference point the object _. a.) is not moving. b.) is moving.

Which of the following is not a transverse wave? a) soundb) lightc) radiod) all of thesee) none of these

Aforce of 100 newtons is used to move an object a distance of 15 meters with a power of 50 watts. find the work dine and the time it takes to do the work