A pendulum bob at its highest point has a certain amount of potential energy. As it falls, what does the potential energy get transformed into? A. kinetic energy only B. potential energy only C. kinetic energy and heat energy D. potential energy and heat energy

It must be measured in k.hope my answer is to you : )

For a collision to be successful you need 2 different objects 

The answer is falsegravitational force is independent of medium and depends only on the masses of the two objects and the distance between them.

Electron equations of the given changes are as follow,a)                              cu      →      cu⁺²  + 2e⁻b)                              mg⁺²  +  2 e⁻      →      mgc)                              cl⁻    →      cl  +  1e⁻d)                              s  +  2 e⁻    →      s²⁻e)                                o²⁻      →      o  +  2 e⁻f)                              p  +  3 e⁻    →      p³⁻g)                              fe²⁺    →      fe³⁺  + 1 e⁻h)                              s²⁻    →      s⁴⁺  +  6 e⁻