1. Convert 6.1 ks to s. 2. Convert 0.859 mg to cg.
3. Convert 65.4 m to mm.
Please help I don't understand

Match the mixture with the substance// i really need on this guys (it’s a pic btw)

Silver reacts with oxygen to produce silver oxide. (write balanced chemical equation and identify type of chemical reaction.)

A2-kg bowling ball is 1 meter off the ground on a post when it falls. just before it reaches the ground,its traveling 4.4 m/s. assuming that there is no air resistant, which statement is true a. the initial potential energy is less then the final kinetic energy b. the mechanical energy is not conserved c. the mechanical energy is conserved d. the initial potential energy is greater than the final kinetic energy