can someone please tell me whether all the subtopics under the topic SPHERICAL MIRRORS in ray optics (physics class 12) is completely deleted? That includes the image formation stuff, the mirror formula derivation and all, magnification, right?

Which additional product balances the reaction h2so4 + 2naoh → na2so4 + 2h2o 2oh h2o2 h3o

Which is the most accurate name for the covalent compound p2o3?

Suppose a force of 60 n is required to stretch and hold a spring 0.1 m from its equilibrium position. a. assuming the spring obeys hooke's law, find the spring constant k. b. how much work is required to compress the spring 0.5 m from its equilibrium position? c. how much work is required to stretch the spring 0.6 m from its equilibrium position? d. how much additional work is required to stretch the spring 0.1 m if it has already been stretched 0.1 m from its equilibrium? a. kequals 600