Suppose you increase your jogging speed from 3 m/s to 7 m/s in a period of 2 s. What is your acceleration? A) 5 m/s2

B) 4 m/s 2

C) 2 m/s2

D) 3 m/s2

E) None of the above

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