Question 1

The SI units for viscosity are N·s/m2.Another commonly used unit for viscosity is the poise,where 10 poise = 1 N·s/m2.The poise is a fairly large unit,and it is more common to use the centipoise.Which of the following is equal to the centipoise?

Accepted Answer

A)  10−3 N·s/m2 
B)  10−2 N·s/m2 
C)  10−1 N·s/m2 
D)  102 N·s/m2

Question 2

By what factor is the total pressure greater at a depth of 650 m in water than at the surface where the pressure is one atmosphere? (water density = 1.0 × 103 kg/m3,1 atmosphere pressure = 1.01 × 105 N/m2,and g = 9.8 m/s2)

Accepted Answer

A)  100 
B)  83 
C)  64 
D)  19

Question 3

At the altitude h the atmospheric pressure is half the pressure at sea level.Let 
Equal the atmospheric pressure at sea level.What is the atmospheric pressure at an altitude 2h?

Accepted Answer

A)  0,since this is at twice the altitude where the pressure halves. 
B)  0.37
 
C)  0.25
 
D)  The answer is not given.

Question 4

A solid rock,suspended in air by a spring scale,has a measured mass of 9.00 kg.When the rock is submerged in water,the scale reads 6.43 kg.What is the density of the rock? (water density = 1000 kg/m3)

Accepted Answer

A)  1.40 × 103 kg/m3 
B)  3.50 × 103 kg/m3 
C)  1.84 × 103 kg/m3 
D)  1.58 × 103 kg/m3

Question 5

A piece of aluminum has density 2.70 g/cm3 and mass 834g.The aluminum is submerged in a container of oil (oil's density = 0.650 g/cm3).How much oil does the metal displace?

Accepted Answer

A)  287 cm3 
B)  309 cm3 
C)  232 cm3 
D)  1125 cm3

Question 6

Water (density = 1 × 103 kg/m3)flows at 16 m/s through a pipe with radius 0.040 m.The pipe goes up to the second floor of the building,3.0 m higher,and the pressure remains unchanged.What is the speed of the water flow in the pipe on the second floor?

Accepted Answer

A)  13 m/s 
B)  14 m/s 
C)  15 m/s 
D)  16 m/s

Question 7

Spherical particles of density 2.0 g/cm3 are shaken in a container of water (viscosity = 1.0 × 10−3 N·s/m3).The water is 8.0 cm deep and is allowed to stand for 15 minutes.What is the greatest terminal velocity of the particles still in suspension at that time?

Accepted Answer

A)  0.55 × 10−5 m/s 
B)  1.1 × 10−5 m/s 
C)  4.4 × 10−5 m/s 
D)  8.8 × 10−5 m/s

Question 8

The Greenland ice sheet can be one km thick.Estimate the pressure underneath the ice where it is 0.80 km deep.(The density of ice is 918 kg/m3. )

Accepted Answer

A)  9.0 × 105 Pa (9 atm) 
B)  2.5 × 106 Pa (25 atm) 
C)  7.2 × 106 Pa (72 atm) 
D)  9.0 × 106 Pa (90 atm)

Question 9

A fluid is drawn up through a tube as shown in the figure.If the height difference from the top of the tank to the bottom of the siphon is H = 1.1 m,then what is the outflow speed? Assume the pressure is the same at the top of the tank and at the siphon outlet. 
​

Accepted Answer

A)  3.3 m/s 
B)  21.6 m/s 
C)  4.6 m/s 
D)  5.4 m/s

Question 10

A 15,000-N car on a hydraulic lift rests on a cylinder with a piston of radius 0.20 m.If a connecting cylinder with a piston of 0.050-m radius is driven by compressed air,what force must be applied to this smaller piston in order to lift the car?

Accepted Answer

A)  600 N 
B)  940 N 
C)  3000 N 
D)  15,000 N

Question 11

A fountain sends water to a height of 50 m.What must be the pressurization (above atmospheric)of the underground water system? (1 atm = 105 N/m2)

Accepted Answer

A)  1 atm 
B)  4.9 atm 
C)  7.2 atm 
D)  9.8 atm

Question 12

Spherical particles of density 3.0 g/cm3 are shaken in a container of water (viscosity = 1.0 × 10−3 N·s/m3).The water is 8.0 cm deep and is allowed to stand for 30 minutes.What is the radius of the largest particles still in suspension at that time?

Accepted Answer

A)  4.5 × 10−6 m 
B)  9.0 × 10−6 m 
C)  2.6 × 10−6 m 
D)  5.6 × 10−6 m

Question 13

A fluid has a density of 1040 kg/m3.If it rises to a height of 1.8 cm in a 2.0-mm diameter capillary tube,what is the surface tension of the liquid?

Accepted Answer

A)  0.046 N/m 
B)  0.056 N/m 
C)  0.092 N/m 
D)  0.11 N/m

Question 14

A balloon of negligible mass is filled with 300 m3 of helium.How big a payload can the balloon lift? (The density of air is 1.29 kg/m3;the density of helium is 0.18 kg/m3. )

Accepted Answer

A)  150 kg 
B)  300 kg 
C)  333 kg 
D)  444 kg

Question 15

Dams at two different locations are needed to form a lake.When the lake is filled,the water level will be at the top of both dams.Dam #2 is twice as high and three as wide as Dam #1.How much greater is the force of the water on Dam #2 than the force on Dam #1? (Ignore atmospheric pressure;it is pushing on both sides of the dams. )

Accepted Answer

A)  24 
B)  12 
C)  6 
D)  3

Question 16

A block of wood has a density of 650 kg/m3.When placed in water,what percent of the volume of the wood is above the surface?

Accepted Answer

A)  0,the block sinks. 
B)  30% 
C)  35% 
D)  65%

Question 17

The bottom of a flat-bottomed aluminum boat has an area of 4.0 m2,and the boat's mass is 120 kg.When set afloat in water,how far below the water surface is the boat bottom? (water density = 1.0 × 103 kg/m3)

Accepted Answer

A)  0.060 m 
B)  0.015 m 
C)  0.030 m 
D)  0.075 m

Question 18

A solid object is made of two materials,one material having density of 2000 kg/m3 and the other having density of 8000 kg/m3.If the object contains equal volumes of the materials,what is its average density?

Accepted Answer

A)  3000 kg/m3 
B)  3200 kg/m3 
C)  5000 kg/m3 
D)  more information is needed

Question 19

A cube of wood of density 0.64 g/cm3 is 10 cm on a side.When placed in water,what height of the block will float above the surface? (water density = 1.00 g/cm3)

Accepted Answer

A)  7.8 cm 
B)  3.6 cm 
C)  2.2 cm 
D)  6.4 cm

Question 20

If the column of mercury in a barometer stands at 69.4 cm,what is the atmospheric pressure? (The density of mercury is 13.6 × 103 kg/m3 and g = 9.80 m/s2. )

Accepted Answer

A)  0.968 × 105 N/m2 
B)  1.03 × 105 N/m2 
C)  0.925 × 105 N/m2 
D)  1.07 × 105 N/m2

Exam 10: Thermal Physics: Part A

The SI units for viscosity are N·s/m².Another commonly used unit for viscosity is the poise,where 10 poise = 1 N·s/m².The poise is a fairly large unit,and it is more common to use the centipoise.Which of the following is equal to the centipoise?

By what factor is the total pressure greater at a depth of 650 m in water than at the surface where the pressure is one atmosphere? (water density = 1.0 × 10³ kg/m³,1 atmosphere pressure = 1.01 × 10⁵ N/m²,and g = 9.8 m/s²)

At the altitude h the atmospheric pressure is half the pressure at sea level.Let Equal the atmospheric pressure at sea level.What is the atmospheric pressure at an altitude 2h?

A solid rock,suspended in air by a spring scale,has a measured mass of 9.00 kg.When the rock is submerged in water,the scale reads 6.43 kg.What is the density of the rock? (water density = 1000 kg/m³)

A piece of aluminum has density 2.70 g/cm³ and mass 834g.The aluminum is submerged in a container of oil (oil's density = 0.650 g/cm³) .How much oil does the metal displace?

Water (density = 1 × 10³ kg/m³) flows at 16 m/s through a pipe with radius 0.040 m.The pipe goes up to the second floor of the building,3.0 m higher,and the pressure remains unchanged.What is the speed of the water flow in the pipe on the second floor?

Spherical particles of density 2.0 g/cm³ are shaken in a container of water (viscosity = 1.0 × 10−³ N·s/m³) .The water is 8.0 cm deep and is allowed to stand for 15 minutes.What is the greatest terminal velocity of the particles still in suspension at that time?

The Greenland ice sheet can be one km thick.Estimate the pressure underneath the ice where it is 0.80 km deep.(The density of ice is 918 kg/m³. )

A fluid is drawn up through a tube as shown in the figure.If the height difference from the top of the tank to the bottom of the siphon is H = 1.1 m,then what is the outflow speed? Assume the pressure is the same at the top of the tank and at the siphon outlet.

A 15,000-N car on a hydraulic lift rests on a cylinder with a piston of radius 0.20 m.If a connecting cylinder with a piston of 0.050-m radius is driven by compressed air,what force must be applied to this smaller piston in order to lift the car?

A fountain sends water to a height of 50 m.What must be the pressurization (above atmospheric) of the underground water system? (1 atm = 10⁵ N/m²)

Spherical particles of density 3.0 g/cm³ are shaken in a container of water (viscosity = 1.0 × 10−³ N·s/m³) .The water is 8.0 cm deep and is allowed to stand for 30 minutes.What is the radius of the largest particles still in suspension at that time?

A fluid has a density of 1040 kg/m³.If it rises to a height of 1.8 cm in a 2.0-mm diameter capillary tube,what is the surface tension of the liquid?

A balloon of negligible mass is filled with 300 m³ of helium.How big a payload can the balloon lift? (The density of air is 1.29 kg/m³;the density of helium is 0.18 kg/m³. )

A block of wood has a density of 650 kg/m³.When placed in water,what percent of the volume of the wood is above the surface?

The bottom of a flat-bottomed aluminum boat has an area of 4.0 m²,and the boat's mass is 120 kg.When set afloat in water,how far below the water surface is the boat bottom? (water density = 1.0 × 10³ kg/m³)

A solid object is made of two materials,one material having density of 2000 kg/m³ and the other having density of 8000 kg/m³.If the object contains equal volumes of the materials,what is its average density?

A cube of wood of density 0.64 g/cm³ is 10 cm on a side.When placed in water,what height of the block will float above the surface? (water density = 1.00 g/cm³)

If the column of mercury in a barometer stands at 69.4 cm,what is the atmospheric pressure? (The density of mercury is 13.6 × 10³ kg/m³ and g = 9.80 m/s². )

Exam 10: Thermal Physics: Part A

The SI units for viscosity are N·s/m2.Another commonly used unit for viscosity is the poise,where 10 poise = 1 N·s/m2.The poise is a fairly large unit,and it is more common to use the centipoise.Which of the following is equal to the centipoise?

By what factor is the total pressure greater at a depth of 650 m in water than at the surface where the pressure is one atmosphere? (water density = 1.0 × 103 kg/m3,1 atmosphere pressure = 1.01 × 105 N/m2,and g = 9.8 m/s2)

At the altitude h the atmospheric pressure is half the pressure at sea level.Let Equal the atmospheric pressure at sea level.What is the atmospheric pressure at an altitude 2h?

A solid rock,suspended in air by a spring scale,has a measured mass of 9.00 kg.When the rock is submerged in water,the scale reads 6.43 kg.What is the density of the rock? (water density = 1000 kg/m3)

A piece of aluminum has density 2.70 g/cm3 and mass 834g.The aluminum is submerged in a container of oil (oil's density = 0.650 g/cm3) .How much oil does the metal displace?

Water (density = 1 × 103 kg/m3) flows at 16 m/s through a pipe with radius 0.040 m.The pipe goes up to the second floor of the building,3.0 m higher,and the pressure remains unchanged.What is the speed of the water flow in the pipe on the second floor?

Spherical particles of density 2.0 g/cm3 are shaken in a container of water (viscosity = 1.0 × 10−3 N·s/m3) .The water is 8.0 cm deep and is allowed to stand for 15 minutes.What is the greatest terminal velocity of the particles still in suspension at that time?

The Greenland ice sheet can be one km thick.Estimate the pressure underneath the ice where it is 0.80 km deep.(The density of ice is 918 kg/m3. )

A fluid is drawn up through a tube as shown in the figure.If the height difference from the top of the tank to the bottom of the siphon is H = 1.1 m,then what is the outflow speed? Assume the pressure is the same at the top of the tank and at the siphon outlet. ​

A 15,000-N car on a hydraulic lift rests on a cylinder with a piston of radius 0.20 m.If a connecting cylinder with a piston of 0.050-m radius is driven by compressed air,what force must be applied to this smaller piston in order to lift the car?

A fountain sends water to a height of 50 m.What must be the pressurization (above atmospheric) of the underground water system? (1 atm = 105 N/m2)

Spherical particles of density 3.0 g/cm3 are shaken in a container of water (viscosity = 1.0 × 10−3 N·s/m3) .The water is 8.0 cm deep and is allowed to stand for 30 minutes.What is the radius of the largest particles still in suspension at that time?

A fluid has a density of 1040 kg/m3.If it rises to a height of 1.8 cm in a 2.0-mm diameter capillary tube,what is the surface tension of the liquid?

A balloon of negligible mass is filled with 300 m3 of helium.How big a payload can the balloon lift? (The density of air is 1.29 kg/m3;the density of helium is 0.18 kg/m3. )

A block of wood has a density of 650 kg/m3.When placed in water,what percent of the volume of the wood is above the surface?

The bottom of a flat-bottomed aluminum boat has an area of 4.0 m2,and the boat's mass is 120 kg.When set afloat in water,how far below the water surface is the boat bottom? (water density = 1.0 × 103 kg/m3)

A solid object is made of two materials,one material having density of 2000 kg/m3 and the other having density of 8000 kg/m3.If the object contains equal volumes of the materials,what is its average density?

A cube of wood of density 0.64 g/cm3 is 10 cm on a side.When placed in water,what height of the block will float above the surface? (water density = 1.00 g/cm3)

If the column of mercury in a barometer stands at 69.4 cm,what is the atmospheric pressure? (The density of mercury is 13.6 × 103 kg/m3 and g = 9.80 m/s2. )

The SI units for viscosity are N·s/m².Another commonly used unit for viscosity is the poise,where 10 poise = 1 N·s/m².The poise is a fairly large unit,and it is more common to use the centipoise.Which of the following is equal to the centipoise?

By what factor is the total pressure greater at a depth of 650 m in water than at the surface where the pressure is one atmosphere? (water density = 1.0 × 10³ kg/m³,1 atmosphere pressure = 1.01 × 10⁵ N/m²,and g = 9.8 m/s²)

A solid rock,suspended in air by a spring scale,has a measured mass of 9.00 kg.When the rock is submerged in water,the scale reads 6.43 kg.What is the density of the rock? (water density = 1000 kg/m³)

A piece of aluminum has density 2.70 g/cm³ and mass 834g.The aluminum is submerged in a container of oil (oil's density = 0.650 g/cm³) .How much oil does the metal displace?

Water (density = 1 × 10³ kg/m³) flows at 16 m/s through a pipe with radius 0.040 m.The pipe goes up to the second floor of the building,3.0 m higher,and the pressure remains unchanged.What is the speed of the water flow in the pipe on the second floor?

Spherical particles of density 2.0 g/cm³ are shaken in a container of water (viscosity = 1.0 × 10−³ N·s/m³) .The water is 8.0 cm deep and is allowed to stand for 15 minutes.What is the greatest terminal velocity of the particles still in suspension at that time?

The Greenland ice sheet can be one km thick.Estimate the pressure underneath the ice where it is 0.80 km deep.(The density of ice is 918 kg/m³. )

A fluid is drawn up through a tube as shown in the figure.If the height difference from the top of the tank to the bottom of the siphon is H = 1.1 m,then what is the outflow speed? Assume the pressure is the same at the top of the tank and at the siphon outlet.

A fountain sends water to a height of 50 m.What must be the pressurization (above atmospheric) of the underground water system? (1 atm = 10⁵ N/m²)

Spherical particles of density 3.0 g/cm³ are shaken in a container of water (viscosity = 1.0 × 10−³ N·s/m³) .The water is 8.0 cm deep and is allowed to stand for 30 minutes.What is the radius of the largest particles still in suspension at that time?

A fluid has a density of 1040 kg/m³.If it rises to a height of 1.8 cm in a 2.0-mm diameter capillary tube,what is the surface tension of the liquid?

A balloon of negligible mass is filled with 300 m³ of helium.How big a payload can the balloon lift? (The density of air is 1.29 kg/m³;the density of helium is 0.18 kg/m³. )

A block of wood has a density of 650 kg/m³.When placed in water,what percent of the volume of the wood is above the surface?

The bottom of a flat-bottomed aluminum boat has an area of 4.0 m²,and the boat's mass is 120 kg.When set afloat in water,how far below the water surface is the boat bottom? (water density = 1.0 × 10³ kg/m³)

A solid object is made of two materials,one material having density of 2000 kg/m³ and the other having density of 8000 kg/m³.If the object contains equal volumes of the materials,what is its average density?

A cube of wood of density 0.64 g/cm³ is 10 cm on a side.When placed in water,what height of the block will float above the surface? (water density = 1.00 g/cm³)

If the column of mercury in a barometer stands at 69.4 cm,what is the atmospheric pressure? (The density of mercury is 13.6 × 10³ kg/m³ and g = 9.80 m/s². )