|
|
Problems 17 final answer is the same as the number of significant figures in the quantity having the 1. What types of natural phenomena could serve as time stan- dards? 2. Suppose that the three fundamental standards of the metric system were length, density, and time rather than 3. The height of a horse is sometimes given in units of “hands.” Why is this a poor standard of length? 4. Express the following quantities using the prefixes given in Table 1.4: (a) 3 ! 10 " 4 m (b) 5 ! 10 " 5 s (c) 72 ! 10 2 g. 5. Suppose that two quantities A and B have different dimen- sions. Determine which of the following arithmetic opera- 6. If an equation is dimensionally correct, does this mean that the equation must be true? If an equation is not di- 7. Do an order-of-magnitude calculation for an everyday situ- ation you encounter. For example, how far do you walk or 8. Find the order of magnitude of your age in seconds. calculation? 10. Estimate the mass of this textbook in kilograms. If a scale is available, check your estimate. 11. In reply to a student’s question, a guard in a natural his- tory museum says of the fossils near his station, “When I Q U E S T I O N S Figure P1.1 L (b) (a) d Section 1.2 Matter and Model Building 1. A crystalline solid consists of atoms stacked up in a repeat- ing lattice structure. Consider a crystal as shown in Note: Consult the endpapers, appendices, and tables in 1, 2 , 3 = straightforward, intermediate, challenging = full solution available in the Student Solutions Manual and Study Guide = coached solution with hints available at http://www.pse6.com = computer useful in solving problem = paired numerical and symbolic problems P R O B L E M S |