When a substance dissolves in a liquid, it breaks down to the size of a.)atoms b.)elements c.)molecules d.)compoundswhen a substance dissolves, it undergoes a chemical changephysical changemolecular change

1-10. need . physics. circular motion. 35 points

Abookcase has a mass of 38 kg and the coefficient of friction between it and the floor is 0.82 what is the maximum force of friction between the bookcase and the floor a 372n b 305n c 412n d 449n

Amoving electron has kinetic energy k1. after a net amount of work w has been done on it, the electron is moving one-quarter as fast in the opposite direction. (a) find w in terms of k1. (b) does your answer depend on the final direction of the electron's motion?