QUIZ 11   Chapters 11, 12 and  13 
 

# READ ALL CHECKPOINTS IN THE CHAPTER !
# STUDY THE NUMBERED OR UNNUMBERED FIGURES, GRAPHS, AND TABLES. 
# IT DOES NOT HURT TO DO EXTRA END-OF-CHAPTER REVIEW QUESTIONS, PLUG AND CHUGS, RANKINGS , OR EXERCISES AND  PROBLEMS. 
#IF TIME PERMITS GET MORE PRACTICE WITH THE OUT OF SEQUENCE  SAMPLE MULTIPLE CHOICE QUIZZES AT VERTICAL LEFT HAND COLUMN  Q1, Q2, Q3, LINKS  ETC HERE~  http://www.nvaphysics.com/P11AU11.htm .

Below are sample problems from Ch. 13 for Real Quiz 8 this coming Tuesday. I have also included at the bottom some problems from Chapter 11 and 12  to help prep you for  Quiz 8.  We can  spend a little time reviewing the homework and sample quiz  problems before the quiz is administered. I assume you have been reading CH. 11, 12, and 13, so by now doing these problems should be natural. I will also provide homework problems from Chapter  13, but the sample quiz should  give you a fresh head  start. 

 
1. A solid box of volume 1.0 m3 is completely submerged  and sits at rest the bottom of a pond of water. The density  of water is 1000 kg/m3. 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 m3 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/m3  . 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  half-submerged box? 
a. 2000 kg/m3
b. 500 kg/m3
c. 1000 kg/m3
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/m3 . For  this problem's computation, you may assume that g = 10 m/s2.
a. 100000  N/m2
b. 100000 N
c. 200000 N
d. 200000 N/m2
e. nota
12.  In the previous problem, if you include atmospheric pressure, the answer will
a. increase
b. decrease
HOMEWORK PROBLEMS FROM WHICH QUIZ 8 COULD  ALSO BE DERIVED ARE LISTED BELOW:
CH.11: RANKING: 1,2, 3 EXERCISE 1, 2, 8, 9, 17, 27
CH 12: RANKING: 1, 2 PROJECTS:  2 EXERCISE: 10, 12, 13, 16
CH 13: REVIEW QUESTIONS:  PRESSURE 2, FLUID PRESSURE 3, 5, BUOYANCY 7, 8, 9 , 10, 11, 12, SINKING OR FLOATING?: 14*, 15* FLOTATION: 19 (HINT: THE OBJECT IS AT REST), 20 PASCAL'S PRINCIPLE.: 21, 22
PLUG AND CHUG: 1, 2, 3, 4 
RANKING:  1, 2, 3 
EXERCISE: 4, 11, 14, 15, 16, 23, 24, 25, 29, 30, 31, 32, 37, 39, 40, 42, 56 ( HINT SEE SECTION ON PASCALS PRINCIPLE. This principle helps us understand hydraulic lifts or the  brakes on 18 wheel big rigs.
HAVE FUN STUDYING !