Question 1

Water comes down the spillway of a dam from an initial vertical height of 170 m.What is the highest possible speed of the water at the end of the spillway?

Accepted Answer

A) 5.89 m/s 
B) 18.4 m/s 
C) 57.7 m/s 
D) 1 670 m/s 
E) 3 330 m/s 
A) 5.89 m/s 
B) 18.4 m/s 
C) 57.7 m/s 
D) 1 670 m/s 
E) 3 330 m/s

Question 2

A substance is allowed to diffuse along a 10-cm length of tubing filled with water.The cross section of the tube is 5.3 cm2.If the diffusion coefficient is 5.0 × 10¯10 m2/s,and 6.5 × 10¯14 kg is transported along the tube in 16 s,what is the difference in the concentration levels of the substance at the two ends of the tube?

Accepted Answer

A) 3.9E-1 kg/m3 
B) 4.3E-2 kg/m3 
C) 1.5E-3 kg/m3 
D) 8.1E-4 kg/m3 
A) 3.9E-1 kg/m3 
B) 4.3E-2 kg/m3 
C) 1.5E-3 kg/m3 
D) 8.1E-4 kg/m3

Question 3

A hole is poked through the metal side of a drum holding water.The hole is 16.0 cm below the water surface.What is the initial speed of outflow?

Accepted Answer

A) 1.77 m/s 
B) 17.7 m/s 
C) 0.566 m/s 
D) 3.14 m/s 
E) 1.25 m/s 
A) 1.77 m/s 
B) 17.7 m/s 
C) 0.566 m/s 
D) 3.14 m/s 
E) 1.25 m/s

Question 4

The quantity "pressure" expressed in terms of the fundamental quantities (mass,length,time)is equivalent to

Accepted Answer

A) MLT−1. 
B) ML−1T−2. 
C) M2L−1T−3. 
D) a dimensionless quantity. 
A) MLT−1. 
B) ML−1T−2. 
C) M2L−1T−3. 
D) a dimensionless quantity.

Question 5

A jet of water flowing from a hose at 18 m/s is directed against a wall.If the mass flow in the fluid stream is 2.0 kg/s,what force is the water applying to the wall if backsplash is negligible?

Accepted Answer

A) 36 N 
B) 0.11 N 
C) 38 N 
D) 350 N 
E) 34 N 
A) 36 N 
B) 0.11 N 
C) 38 N 
D) 350 N 
E) 34 N

Question 6

In a large tank of liquid,the hydrostatic pressure at a given depth is a function of

Accepted Answer

A) depth. 
B) surface area. 
C) liquid density. 
D) Choices a and c are both valid. 
A) depth. 
B) surface area. 
C) liquid density. 
D) Choices a and c are both valid.

Question 7

Water pressurized to 3.00 × 105 Pa is flowing at 5.25 m/s in a pipe which contracts to 1/2 of its former area.What are the pressure and speed of the water after the contraction? (Density of water = 1 × 103 kg/m3. )

Accepted Answer

A) 2.59E+5 Pa,10.5 m/s 
B) 3.00E+5 Pa,2.63 m/s 
C) 3.00E+5 Pa,10.5 m/s 
D) 4.59E+5 Pa,10.5 m/s 
E) 2.59E+5 Pa,2.63 m/s 
A) 2.59E+5 Pa,10.5 m/s 
B) 3.00E+5 Pa,2.63 m/s 
C) 3.00E+5 Pa,10.5 m/s 
D) 4.59E+5 Pa,10.5 m/s 
E) 2.59E+5 Pa,2.63 m/s

Question 8

Spherical particles of density 1.8 g/cm3 are shaken in a container of water (viscosity = 1.0 × 10−3 N⋅s/m3).The water is 9.0 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) 2.5E-6 m 
B) 6.4E-6 m 
C) 5.4E-6 m 
D) 1.8E-6 m 
E) 4.1E-6 m 
A) 2.5E-6 m 
B) 6.4E-6 m 
C) 5.4E-6 m 
D) 1.8E-6 m 
E) 4.1E-6 m

Question 9

A fountain sends water to a height of 113 m.What must be the pressurization (above atmospheric)of the underground water system? (1 atm = 105 N/m2)

Accepted Answer

A) 1.0 atm 
B) 47.1 atm 
C) 12.1 atm 
D) 11.1 atm 
E) 0.115 atm 
A) 1.0 atm 
B) 47.1 atm 
C) 12.1 atm 
D) 11.1 atm 
E) 0.115 atm

Question 10

The pressure inside a commercial airliner is maintained at 1.00 atm (105 Pa).What is the net outward force exerted on a 1.0 m × 2.0 m cabin door if the outside pressure is 0.30 atm?

Accepted Answer

A) 140 N 
B) 1 400 N 
C) 14 000 N 
D) 140 000 N 
A) 140 N 
B) 1 400 N 
C) 14 000 N 
D) 140 000 N

Question 11

In order to overcome a surface tension of a fluid,a force of 1.35 × 10−2 N is required to lift a wire ring of circumference 13.0 cm.What is the surface tension of the fluid?

Accepted Answer

A) 0.052 N/m 
B) 0.104 N/m 
C) 0.552 N/m 
D) 5.19 N/m 
E) 17.6 N/m 
A) 0.052 N/m 
B) 0.104 N/m 
C) 0.552 N/m 
D) 5.19 N/m 
E) 17.6 N/m

Question 12

A U-tube is partially filled with water and then an immiscible liquid is added to the right side.The top of the liquid is a distance h1 = 2.40 cm above the level of interface between the liquid and water.On the left side of the tube the top of the water is a distance h2 = 1.48 cm above the liquid-water interface on the right side.What is the density of the liquid in terms of the density of water,1 000 kg/m3?

Accepted Answer

A) 1 620 kg/m3 
B) 617 kg/m3 
C) 622 kg/m3 
D) 237 kg/m3 
A) 1 620 kg/m3 
B) 617 kg/m3 
C) 622 kg/m3 
D) 237 kg/m3

Question 13

A copper wire of length 5.0 m,cross sectional area 6.9 × 10−6 m2,and Young's modulus 11 × 1010 N/m2 has a 190-kg load hung on it.What is its increase in length? (g = 9.8 m/s2)

Accepted Answer

A) 5.0E-3 m 
B) 1.8E-2 m 
C) 7.3E-3 m 
D) 1.2E-2 m 
E) ​2.5E-2 m 
A) 5.0E-3 m 
B) 1.8E-2 m 
C) 7.3E-3 m 
D) 1.2E-2 m 
E) ​2.5E-2 m

Question 14

In an elastic solid there is a direct proportionality between strain and

Accepted Answer

A) elastic modulus. 
B) temperature. 
C) cross-sectional area. 
D) stress. 
A) elastic modulus. 
B) temperature. 
C) cross-sectional area. 
D) stress.

Question 15

A cube of wood of density 0.780 g/cm3 is 11.2 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) 8.74 cm 
B) 11.2 cm 
C) 2.46 cm 
D) 3.46 cm 
E) 1.46 cm 
A) 8.74 cm 
B) 11.2 cm 
C) 2.46 cm 
D) 3.46 cm 
E) 1.46 cm

Exam 9: Fluids and Solids

Water comes down the spillway of a dam from an initial vertical height of 170 m.What is the highest possible speed of the water at the end of the spillway?

A hole is poked through the metal side of a drum holding water.The hole is 16.0 cm below the water surface.What is the initial speed of outflow?

The quantity "pressure" expressed in terms of the fundamental quantities (mass,length,time)is equivalent to

A jet of water flowing from a hose at 18 m/s is directed against a wall.If the mass flow in the fluid stream is 2.0 kg/s,what force is the water applying to the wall if backsplash is negligible?

In a large tank of liquid,the hydrostatic pressure at a given depth is a function of

Water pressurized to 3.00 × 105 Pa is flowing at 5.25 m/s in a pipe which contracts to 1/2 of its former area.What are the pressure and speed of the water after the contraction? (Density of water = 1 × 103 kg/m3. )

Spherical particles of density 1.8 g/cm3 are shaken in a container of water (viscosity = 1.0 × 10−3 N⋅s/m3).The water is 9.0 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 fountain sends water to a height of 113 m.What must be the pressurization (above atmospheric)of the underground water system? (1 atm = 105 N/m2)

The pressure inside a commercial airliner is maintained at 1.00 atm (105 Pa).What is the net outward force exerted on a 1.0 m × 2.0 m cabin door if the outside pressure is 0.30 atm?

In order to overcome a surface tension of a fluid,a force of 1.35 × 10−2 N is required to lift a wire ring of circumference 13.0 cm.What is the surface tension of the fluid?

A copper wire of length 5.0 m,cross sectional area 6.9 × 10−6 m2,and Young's modulus 11 × 1010 N/m2 has a 190-kg load hung on it.What is its increase in length? (g = 9.8 m/s2)

In an elastic solid there is a direct proportionality between strain and

A cube of wood of density 0.780 g/cm3 is 11.2 cm on a side.When placed in water,what height of the block will float above the surface? (water density = 1.00 g/cm3)

Units, Trigonometry, and Vectors

Motion in One Dimension

Motion in Two Dimensions

Newtons Laws of Motion

Energy

Momentum, Impulse, and Collisions

Rotational Motion and Gravitation

Rotational Equilibrium and Dynamics

Thermal Physics

Energy in Thermal Processes

The Laws of Thermodynamics

Vibrations and Waves

Sound

Electric Forces and Fields

Electrical Energy and Capacitance

Current and Resistance

Direct-Current Circuits

Magnetism

Induced Voltages and Inductance

Alternating-Current Circuits and Electromagnetic Waves

Reflection and Refraction of Light

Mirrors and Lenses

Wave Optics

Optical Instruments

Relativity

Quantum Physics

Atomic Physics

Nuclear Physics

Nuclear Energy and Elementary Particles

Filters

Water pressurized to 3.00 × 10⁵ Pa is flowing at 5.25 m/s in a pipe which contracts to 1/2 of its former area.What are the pressure and speed of the water after the contraction? (Density of water = 1 × 10³ kg/m³. )

Spherical particles of density 1.8 g/cm³ are shaken in a container of water (viscosity = 1.0 × 10−³ N⋅s/m³).The water is 9.0 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 fountain sends water to a height of 113 m.What must be the pressurization (above atmospheric)of the underground water system? (1 atm = 10⁵ N/m²)

The pressure inside a commercial airliner is maintained at 1.00 atm (10⁵ Pa).What is the net outward force exerted on a 1.0 m × 2.0 m cabin door if the outside pressure is 0.30 atm?

In order to overcome a surface tension of a fluid,a force of 1.35 × 10−² N is required to lift a wire ring of circumference 13.0 cm.What is the surface tension of the fluid?

A copper wire of length 5.0 m,cross sectional area 6.9 × 10−⁶ m²,and Young's modulus 11 × 10¹⁰ N/m² has a 190-kg load hung on it.What is its increase in length? (g = 9.8 m/s²)

A cube of wood of density 0.780 g/cm³ is 11.2 cm on a side.When placed in water,what height of the block will float above the surface? (water density = 1.00 g/cm³)