Question 1

An incompressible fluid is flowing through a vertical pipe with a constriction. The wide section is 2.00 cm in diameter and is at the top of the pipe. The pressure of the fluid in the wide section at the top is 200 kPa. The velocity of the fluid in the wide section is 4.00 m/s. The narrow section is 1.00 cm in diameter and is located 2.00 m below the wide section. What is the pressure of the fluid in the narrow section? (density of the fluid is 1,000 kg/m3)

Accepted Answer

A)   72.0 kPa
B)   80.0 kPa
C)   99.6 kPa
D)   105 kPa
E)   116 kPaF) A) and D)
G) B) and D)

Question 2

A 1.10 kg hollow steel ball is submerged in water. Its weight in water is 8.75 N. The volume of the cavity inside the ball is (density of steel is 7,900 kg/m3)

Accepted Answer

A)   1.59 × 10−5 m3.
B)   6.79 × 10−5 m3.
C)   1.13 × 10−4 m3.
D)   1.39 × 10−4 m3.
E)   2.07 × 10−4 m3.F) C) and D)
G) A) and B)

Question 3

The surface tension of water is 0.0730 N/m. What is the height of the water in a capillary tube of diameter 1.00 mm?

Accepted Answer

A)   3.02 cm
B)   2.98 cm
C)   2.75 cm
D)   2.55 cm
E)   2.40 cmF) All of the above
G) None of the above

Question 4

A 90.0 kg scuba diver with tanks and equipment is submerged and floating underwater in seawater (density 1.025 g/cm3) . The volume of the seawater displaced by the scuba diver with tanks and equipment is

Accepted Answer

A)   0.0508 m3.
B)   0.0575 m3.
C)   0.0667 m3.
D)   0.0708 m3.
E)   0.0878 m3.F) B) and E)
G) A) and C)

Question 5

The water level in a water tower is 50.00 m above the ground. What is the gauge pressure of the water at a faucet that is 2.000 m above the ground?

Accepted Answer

A)   500,200 N/m2
B)   470,400 N/m2
C)   451,300 N/m2
D)   422,400 N/m2
E)   410,400 N/m2F) A) and E)
G) C) and D)

Question 6

A sphere is made up of two layers: The first is lead (density 11,340 kg/m3)  and is of radius R. The second is tin, (7,310 kg/m3)  and is concentric with the first, from radius R to radius 2R. The sphere is placed in a pool of mercury (density 13,600 kg/m3) . How much of the volume of the sphere is below the surface?

Accepted Answer

A)   68.5%
B)   57.5%
C)   57.0%
D)   64.2%E) A) and C)
F) B) and C)

Question 7

An incompressible fluid is flowing through a vertical pipe with a constriction. The wide section is 2.00 cm in diameter and is at the top of the pipe. The pressure of the fluid in the wide section at the top is 200 kPa. The velocity of the fluid in the wide section is 4.00 m/s. The narrow section is located 4.00 m below the wide section. What is the diameter of the narrow section for the pressure of the fluid in the narrow section to equal the pressure in the wide section? (density of the fluid is 1,000 kg/m3)

Accepted Answer

A)   1.50 cm
B)   1.36 cm
C)   1.28 cm
D)   1.12 cm
E)   1.00 cmF) A) and B)
G) C) and D)

Question 8

An incompressible fluid is flowing through a pipe with a constriction. The pipe is on an incline with an angle of 30.0 degrees. The narrow section is 10.0 m from the wide section and the narrow section is higher than the wide section. The velocity of the fluid in the wide section of the pipe is 4.00 m/s. The diameter of the wide section is 12.00 cm and the diameter of the narrow section is 9.00 cm. The pressure of the fluid in the wide section is 250 kPa. What is the pressure in the narrow section of the pipe? (density of the fluid is 1,000 kg/m3)

Accepted Answer

A)   210 kPa
B)   205 kPa
C)   195 kPa
D)   184 kPa
E)   175 kPaF) B) and D)
G) C) and D)

Question 9

A 120 kg scuba diver with tanks and equipment is submerged and floating underwater in seawater (density 1.025 g/cm3) . The volume of the seawater displaced by the scuba diver with tanks and equipment is

Accepted Answer

A)   0.097 m3.
B)   0.102 m3.
C)   0.117 m3.
D)   0.154 m3.
E)   0.177 m3.F) None of the above
G) B) and C)

Question 10

Water undergoes viscous flow through two pipes with the same pressure difference between the ends. Pipe 1 has three times the diameter and twice the length of pipe 2. If the flow rate through pipe 1 is 0.400 cm3/s, then what is the flow rate through pipe 2?

Accepted Answer

A)   6.22 × 10−3 cm3/s
B)   7.78 × 10−3 cm3/s
C)   8.33 × 10−3 cm3/s
D)   9.88 × 10−3 cm3/s
E)   10.80 × 10−3 cm3/sF) All of the above
G) B) and D)

Question 11

A 100 kg mass has a density of 2,000 kg/m3. If the volume is decreased by 2% due to compression, then the density is

Accepted Answer

A)   3,011 kg/m3.
B)   2,940 kg/m3.
C)   2,522 kg/m3.
D)   2,440 kg/m3.
E)   2,041 kg/m3.F) A) and C)
G) B) and D)

Question 12

A mercury manometer measures a pressure of 150 mmHg. What is this pressure in kPa?

Accepted Answer

A)   12 kPa
B)   15 kPa
C)   20 kPa
D)   24 kPa
E)   29 kPaF) B) and E)
G) C) and D)

Question 13

A U-shaped manometer, filled with a liquid of unknown density, is connected on one side to a vessel containing gas at gauge pressure 10.0 kPa, and the other side is open to the atmosphere (pressure 101.3 kPa) . The level of the liquid in the side connected to the gas vessel is lower than on the open side. The difference in height between the two sides is 10 cm. What is the density of the liquid in the manometer?

Accepted Answer

A)   1.13 × 103 kg/m3
B)   2.27 × 105 kg/m3
C)   1.03 × 102 kg/m3
D)   1.13 × 105 kg/m3
E)   1.02 × 104 kg/m3F) A) and B)
G) A) and C)

Question 14

An incompressible fluid is flowing through a horizontal pipe with a constriction. The velocity of the fluid in the wide section of the pipe is 6.00 m/s and the velocity of the fluid in the narrow section of pipe is 8.00 m/s. The pressure of the fluid in the wide section is 250 kPa. What is the pressure in the narrow section of the pipe? (density of the fluid is 1,000 kg/m3)

Accepted Answer

A)   183 kPa
B)   236 kPa
C)   268 kPa
D)   285 kPa
E)   298 kPaF) A) and D)
G) A) and E)

Question 15

What is the density of a mixture of 90% air (density air 1.20 kg/m3)  and 10% helium (density of 0.180 kg/m3) ?

Accepted Answer

A)   0.680 kg/m3
B)   0.750 kg/m3
C)   0.980 kg/m3
D)   1.098 kg/m3
E)   1.103 kg/m3F) B) and C)
G) All of the above

Question 16

A ball with a diameter of 20.00 cm is placed in water with 75% of its volume above the surface of the water. The buoyant force of the water on the ball is

Accepted Answer

A)   16.67 N.
B)   14.75 N.
C)   13.60 N.
D)   12.56 N.
E)   10.26 N.F) C) and D)
G) C) and E)

Question 17

Air with a density of 1.20 kg/m3 flows through a 10.0 cm diameter pipe with a velocity of 1.20 m/s. What is the mass flow rate?

Accepted Answer

A)   0.0148 kg/s
B)   0.0131 kg/s
C)   0.0120 kg/s
D)   0.0113 kg/s
E)   0.0098 kg/sF) A) and B)
G) None of the above

Question 18

An incompressible fluid is flowing through a pipe with a constriction. The pipe is on an incline with an angle of 20.0 degrees. The narrow section is 15.0 m from the wide section and the narrow section is lower than the wide section. The velocity of the fluid in the wide section of the pipe is 6.00 m/s and the velocity of the fluid in the narrow section of pipe is 9.00 m/s. The pressure of the fluid in the wide section is 250 kPa. What is the pressure in the narrow section of the pipe? (density of the fluid is 1,000 kg/m3)

Accepted Answer

A)   278 kPa
B)   228 kPa
C)   195 kPa
D)   167 kPa
E)   145 kPaF) A) and B)
G) B) and E)

Question 19

A force of 120.0 N is applied to 2.000 cm diameter piston, which is in contact with a closed container of water (density of water = 1,000 kg/m3) . A second piston, with a diameter of 25.00 cm and at the same height as the first piston, is also in contact with the water. What force does the water pressure exert on the second piston?

Accepted Answer

A)   18,750 N.
B)   10,450 N.
C)   9,500 N.
D)   9,150 N.
E)   8,450 N.F) A) and E)
G) All of the above

Question 20

A mercury manometer measures a pressure of 200.0 mmHg. What is this pressure in Pa?

Accepted Answer

A)   19,770 Pa
B)   26,660 Pa
C)   30,230 Pa
D)   36,760 Pa
E)   39,600 PaF) C) and D)
G) B) and E)

Exam 9: Fluids

The water level in a water tower is 50.00 m above the ground. What is the gauge pressure of the water at a faucet that is 2.000 m above the ground?

Correct Answer
verified

The surface tension of water is 0.0730 N/m. What is the height of the water in a capillary tube of diameter 1.00 mm?

Correct Answer
verified

Correct Answer
verified

What is the density of a mixture of 90% air (density air 1.20 kg/m³) and 10% helium (density of 0.180 kg/m³) ?

Correct Answer
verified

A 100 kg mass has a density of 2,000 kg/m³. If the volume is decreased by 2% due to compression, then the density is

Correct Answer
verified

A 120 kg scuba diver with tanks and equipment is submerged and floating underwater in seawater (density 1.025 g/cm3) . The volume of the seawater displaced by the scuba diver with tanks and equipment is

Correct Answer
verified

Water undergoes viscous flow through two pipes with the same pressure difference between the ends. Pipe 1 has three times the diameter and twice the length of pipe 2. If the flow rate through pipe 1 is 0.400 cm³/s, then what is the flow rate through pipe 2?

Correct Answer
verified

Correct Answer
verified

A mercury manometer measures a pressure of 200.0 mmHg. What is this pressure in Pa?

Correct Answer
verified

Correct Answer
verified

A 1.10 kg hollow steel ball is submerged in water. Its weight in water is 8.75 N. The volume of the cavity inside the ball is (density of steel is 7,900 kg/m³)

Correct Answer
verified

Correct Answer
verified

A 90.0 kg scuba diver with tanks and equipment is submerged and floating underwater in seawater (density 1.025 g/cm3) . The volume of the seawater displaced by the scuba diver with tanks and equipment is

Correct Answer
verified

Correct Answer
verified

A mercury manometer measures a pressure of 150 mmHg. What is this pressure in kPa?

Correct Answer
verified

A ball with a diameter of 20.00 cm is placed in water with 75% of its volume above the surface of the water. The buoyant force of the water on the ball is

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Air with a density of 1.20 kg/m³ flows through a 10.0 cm diameter pipe with a velocity of 1.20 m/s. What is the mass flow rate?

Correct Answer
verified

Correct Answer
verified

Exam 9: Fluids

The water level in a water tower is 50.00 m above the ground. What is the gauge pressure of the water at a faucet that is 2.000 m above the ground?

Correct AnswerverifiedShow Answer

The surface tension of water is 0.0730 N/m. What is the height of the water in a capillary tube of diameter 1.00 mm?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

What is the density of a mixture of 90% air (density air 1.20 kg/m3) and 10% helium (density of 0.180 kg/m3) ?

Correct AnswerverifiedShow Answer

A 100 kg mass has a density of 2,000 kg/m3. If the volume is decreased by 2% due to compression, then the density is

Correct AnswerverifiedShow Answer

A 120 kg scuba diver with tanks and equipment is submerged and floating underwater in seawater (density 1.025 g/cm3) . The volume of the seawater displaced by the scuba diver with tanks and equipment is

Correct AnswerverifiedShow Answer

Water undergoes viscous flow through two pipes with the same pressure difference between the ends. Pipe 1 has three times the diameter and twice the length of pipe 2. If the flow rate through pipe 1 is 0.400 cm3/s, then what is the flow rate through pipe 2?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

A mercury manometer measures a pressure of 200.0 mmHg. What is this pressure in Pa?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

A 1.10 kg hollow steel ball is submerged in water. Its weight in water is 8.75 N. The volume of the cavity inside the ball is (density of steel is 7,900 kg/m3)

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

A 90.0 kg scuba diver with tanks and equipment is submerged and floating underwater in seawater (density 1.025 g/cm3) . The volume of the seawater displaced by the scuba diver with tanks and equipment is

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

A mercury manometer measures a pressure of 150 mmHg. What is this pressure in kPa?

Correct AnswerverifiedShow Answer

A ball with a diameter of 20.00 cm is placed in water with 75% of its volume above the surface of the water. The buoyant force of the water on the ball is

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Air with a density of 1.20 kg/m3 flows through a 10.0 cm diameter pipe with a velocity of 1.20 m/s. What is the mass flow rate?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

What is the density of a mixture of 90% air (density air 1.20 kg/m³) and 10% helium (density of 0.180 kg/m³) ?

Correct Answer
verified

A 100 kg mass has a density of 2,000 kg/m³. If the volume is decreased by 2% due to compression, then the density is

Correct Answer
verified

Correct Answer
verified

Water undergoes viscous flow through two pipes with the same pressure difference between the ends. Pipe 1 has three times the diameter and twice the length of pipe 2. If the flow rate through pipe 1 is 0.400 cm³/s, then what is the flow rate through pipe 2?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

A 1.10 kg hollow steel ball is submerged in water. Its weight in water is 8.75 N. The volume of the cavity inside the ball is (density of steel is 7,900 kg/m³)

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Air with a density of 1.20 kg/m³ flows through a 10.0 cm diameter pipe with a velocity of 1.20 m/s. What is the mass flow rate?

Correct Answer
verified

Correct Answer
verified