Physics 011
A of
PQ#10A
Practice
Questions


1. 

Which of
the following is not a unit of pressure? 


2. 

Which of
the following is a unit for Bernoulli's equation? Density is used not mass. Review Section 108 in Giancoli. 


3. 

What is an
alternate unit for Bernoulli's equation? Review Section 1010 in Giancoli. 


4. 

Which of
the following is not a unit for surface tension? Review Section 1012 in Giancoli. 


5. 

Which of
the following is a unit of density? This is sometimes called surface density but has no application here. Review Section 101 in Giancoli. 


6. 

One
kilogram of Iron (density~7.8 gm/cm^{3}) and 1 kilogram of Aluminum
(density~2.7 gm/cm^{3}) are dropped into a pool. Which has the
largest buoyant force on it? They don't have the same volume. Review Section 106 in Giancoli. 


7. 

One cubic
centimeter of Iron and 1 cubic centimeter of Aluminum are dropped into a
pool. Which has the largest buoyant force on it? 


8. 

One gram
of Iron and 1 cubic centimeter of Aluminum are dropped into a pool. Which has
the largest buoyant force on it? A sunken object displaces its volume in water. Review Section 106 in Giancoli. 


9. 

One gram
of Oak (density~.8 gm/cm^{3}) and 1 gm of Aluminum are dropped into a
pool. Which has the largest buoyant force on it? 


10. 

One cubic
centimeter of Oak and 1 cubic centimeter of Aluminum are dropped into a pool.
Which has the largest buoyant force on it? The Oak would displace less than 1 cubic centimeter of water. Review Section 106 in Giancoli. 


11. 

Ice
(density=.92 gm/cm^{3}) floats freely in a glass of water. The ice
melts. Does the level go up, down or stay the same? 


12. 

Ice in a
glass of Alcohol (density=.8 gm/cm^{3}) melts. Does the level go up,
down or stay the same? The volume of the water will be less than the Ice. Review Section 106 in Giancoli. 


13. 

You are on
a float in a pool using hand weights. The weights fall overboard. Does the
pool water level go up, down, or stay the same? The floating weight displaces its weight When it sinks it displaces its volume. Review Section 106 in Giancoli. 


14. 

The large beaker in the picture is set up so that the water displaced by the submerging weight overflows into the small beaker. In frame E what are the readings on scales a, b, and c, respectively? Review Section 106 in Giancoli. 


15. 

The large beaker in the picture is set up so that the water displaced by the submerging weight overflows into the small beaker. When would scale (a) again read 10 N? 


16. 

The large beaker in the picture is set up so that the water displaced by the submerging weight overflows into the small beaker. Which frame would the reading on scale (b) read 0.5 N? It would have to be half full. Review Section 106 in Giancoli. 


17. 

The large beaker in the picture is set up so that the water displaced by the submerging weight overflows into the small beaker. What is the combined weight of the readings on scales b and c in frames B
or C in the animation? Review Section 106 in Giancoli. 


18. 

The large beaker in the picture is set up so that the water displaced by the submerging weight overflows into the small beaker. When would scale c in the animation read 3.25 N? Review Section 106 in Giancoli. 


19. 

For the
purpose of this problem use 10 m/s^{2} for g and 100000 N/m^{2}
for 1 atm. The pressure at A is 9.5 atm and the water velocity is 10 m/s. What is the
water velocity at point C? Review Example 1012 in Giancoli. 


20. 

For the
purpose of this problem use 10 m/s^{2} for g and 100000 N/m^{2}
for 1 atm. What is the velocity at point B? Remember that cross section area goes as the radius squared. Review Example 1010 in Giancoli. 


21. 

For the
purpose of this problem use 10 m/s^{2} for g and 100000 N/m^{2}
for 1 atm. What is the velocity at point D? Review Example 1010 in Giancoli. 


22. 

For the
purpose of this problem use 10 m/s^{2} for g and 100000 N/m^{2}
for 1 atm. What is the pressure at point C? Review Example 1012 in Giancoli. 


23. 

For the
purpose of this problem use 10 m/s^{2} for g and 100000 N/m^{2}
for 1 atm. What is the pressure at point D? 


24. 

For the
purpose of this problem use 10 m/s^{2} for g and 100000 N/m^{2}
for 1 atm. What is the pressure at point B? 


25. 

Assuming
that the density of air is a constant 1.3 kg/m ^{3} and that the air
pressure is 30 inches (76 cm) of Hg, what is the pressure at the top of a 500
meter high skyscraper? Review Example 102 in Giancoli. 