13. The specific heat of zinc is 386 joules per kilogram per Celsius degree. The amount of heat energy required to raise the temperature of 0.25 kilogram of zinc from 0 C to 28 C is most nearly (a) 1500 J (b)/2700 J (c) 3500 J (d) 4300 J 14. The liquid in the tube has a density of 13.600 kilograms per cubic Atmosphere meter. The atmospheric pressure is 1.013 x 10 newtons per square meter. The pressure P is most nearly P (a) 1.05 x 105 Pa 815,650 0.240 m (b) 1.25 x 105 Pa (C) .33 x 105 Pa 3. 2019 10 7. (8) 1.47 & 105 Pa 15. The magnitude of the gravitational attraction force that the earth exerts on an 85-kilogram person who is 4.0 x 107 meters away from the center of the earth is best approximated by which of the following? Useful numbers: mearth = 5.98 x 103# kg; G = 6.67 x 10-1l N.makg 2 : (2) 21 N ( b) 85 N (C) 240 N (d) 830 N 16. A block of mass m slides from rest down a frictionless inclined plane that has a height, h, as shown. The speed, i, of the block at the bottom of the plane in terms of g and h is (a) 2gh (b) 12gh (c) 12gh m (d) 2 -gh 17. . A ray of light at a particular frequency strikes the interface, as shown. The index of refraction of medium x is slightly less than the index of refraction of medium . The angle 0 measures 40. Which of the following statements must be true? Medium x Medium y ( b) a >. B (d) None of the above statements are true. t @ 1993 by Saxon Publishers, Inc. Reproduction for resale prohibited. Physics by Saxon