Races are also held for speedboats. describe the forces on a speedboat in the following situations. name the forces and state wether they are balanced or unbalanced, and in which direction the resultant force is acting: a) while it is waiting to start the race

b) as it speeds up

c) as it slows down

An unknown substance is a white solid at room temperature and has a melting point of 78 °c. which of the following substances is most likely to be the identity of the unknown sample? a. naphthalene, a molecular solid with the formula c10h8 b. silica, a network solid held together by covalent bonds with the formula sio2 c. calcium chloride, an ionic compound with the formula cacl2 d. water, an molecular compound with the formula h2o