QUIZ 9  Part 2 Chapters 13 and 15 (Click here for more of sample Quiz 9) 

1. A solid box of volume 1.0 m^{3} is completely submerged and sits at rest the bottom of a pond of water. The density of water is 1000 kg/m^{3}. What is the magnitude of the buoyant force on the box? 
a. 98 N 
b. 9800 N 
c. 980000 N 
d nota 
2. What is the direction of the buoyant force on the box of the previous problem? 
a. downward 
b. upward 
c. leftward 
d rightward 
3. In the previous problem, the box sits at the bottom of the pond because 
a. the box density is greater than the density of water. 
b. the box density is equal to the density of water. 
c. the box density is less than the density of water. 
d. nota 
4. A solid box of volume 1.0 m^{3} is partially submerged and floats with the top of the box above the surface of a pond of pure water. The density of water is 1000 kg/m^{3 } . One half of the volume of the box is submerged under the water surface. What is the magnitude of the buoyant force on the box? 
a. 19600 N 
b. 49 N 
c. 4900 N 
d. 1960000 N 
e. nota 
5. In the previous problem, what direction is the buoyant force on the floating box? 
a. up 
b. down 
c. nota 
6. In the previous problem, what direction is the weight of the floating box? 
a. up 
b. down 
c. nota 
7. In the previous problem, the box floats because 
a. the box density is equal to the density of water. 
b. the box density is greater than the density of water. 
c. the box density is less than the density of water. 
d. nota 
8. Referring to the the previous problem, what is the density of the halfsubmerged box? 
a. 2000 kg/m^{3} 
b. 500 kg/m^{3} 
c. 1000 kg/m^{3} 
d. nota 
9. A scrap of iron is thrown overboard from inside a ship. The buoyant force on the ship will 
a. decrease 
b. increase 
c. remain the same 
d. nota 
10. In the previous problem, after the scrap is thrown overboard, the top of the ship will be 
a. farther above the surface of the water. 
b. closer to the surface of the water. 
c. the same distance from the surface of the water. 
d. nota 
11. What is the water pressure 20 m below the surface of a lake of
water? The density of water is 1000 kg/m^{3 } . For this problem's computation, you may assume that g = 10 m/s^{2}. 
a. 100000 N/m^{2} 
b. 100000 N 
c. 200000 N 
d. 200000 N/m^{2} 
e. nota 
12. Extra Credit. In the previous problem, if you include atmospheric pressure, the answer will 
a. increase 
b. decrease 
13. Which has greater internal total kinetic energy, an 8ounce cup of water at 80 degrees Celsius or a giant cubeshaped 1 milelong ice berg at 0 degrees Celsius? 
a. the ice berg 
b. the cup of water 
c. both have the same total internal kinetic energy 
d nota 
14. Which has greater internal average kinetic energy, an 8ounce cup of water at 80 degrees Celsius or a giant ice berg at 0 degrees Celsius? 
a. the ice berg 
b. the cup of water 
c. both have the same internal average kinetic energy 
d nota 
15. Suppose you supply a flame to 1 liter of water for a certain time and its temperature rises by 4 degrees Celsius. If you apply the same flame for the same time to 2 liters of water, by how much will the temperature rise? 
a. 1 degree Celsius 
b. 2 degrees Celsius 
c. 4 degrees Celsius 
d. 8 degrees Celsius 
e. nota 
16. Which has a higher specific heat capacity c, water or sand? 
a. sand 
b. water 
c. both the same 
d. nota 
17. A brass ball is able to perfectly pass through an iron ring at the same temperature. (In other words, the ball and ring have exactly the same diameter.) Suppose both the ball and ring are heated together to the same final temperature. What will happen? 
a. The brass ball will be able to pass through the iron ring. 
b. The brass ball will not be able to pass through the iron ring. 
c. nota 
18. A brass ball is able to perfectly pass through an iron ring at the same temperature. (In other words, the ball and ring have exactly the same diameter.) Suppose both the ball and ring are cooled together to the same final temperature. What will happen? 
a. The brass ball will be able to pass through the iron ring. 
b. The brass ball will not be able to pass through the iron ring. 
c. nota 
19. An iron ball is able to perfectly pass through a brass ring at the same temperature. (In other words, the ball and ring have exactly the same diameter.) Suppose both the ball and ring are cooled together to the same final temperature. What will happen? 
a. The iron ball will be able to pass through the brass ring. 
b. The iron ball will not be able to pass through the brass ring. 
c. nota 
20. Which has the greatest density, pure water or pure ice? 
a. ice 
b. water 
c. both the same 
d. nota 
21. Suppose the temperature of a sample of H_{2}0 rises from 0 to 4 degrees Celsius. The density of the sample will 
a. increase 
b. decrease 
c. remain the same 
d. nota 
22. Suppose a sample of pure water has a mass m = 2.0 g. Suppose I turn on a flame and supply an amount of heat Q = 4 cal. to the sample. The specific heat capacity of water is c = 1.0 cal/[g(^{o}C)]. What will be the change in temperature? (Hint: See the footnote at the bottom of page 295.) 
a. 1 degree Celsius 
b. 2 degrees Celsius 
c. 4 degrees Celsius 
d. nota 
23. Suppose a sample of pure copper has a mass m = 2.0 g. Suppose I turn on a flame and supply an amount of heat Q = 0.368 cal. to the sample. The specific heat capacity of copper is c = 0.092 cal/[g(^{o}C)]. What will be the change in temperature? (Hint: See the footnote at the bottom of page 295.) 
a. 1 degree Celsius 
b. 2 degrees Celsius 
c. 3 degrees Celsius 
d. 4 degrees Celsius 
e. nota 
24. Extra Credit. Suppose a sample of pure copper has a mass m = 2.0 g. Suppose a sample of pure water also has a mass m = 2.0 g. Suppose I turn on a flame and supply an equal amount of heat Q = 1.0 cal. to both samples. Which sample will have the greatest rise in temperature? 
a. Both samples will have the same temperature rise. 
b. The copper sample will have the greatest temperature rise. 
c. The water sample will have the greatest temperature rise. 
d. nota 