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- Question : 1FEEP - If force, length, and time are selected as the three fundamental dimensions, the units of mass in the SI system could be written as: (A) FT2 /L (B) FL/T2 (C) N s 2 /m (D) N m/s2
- Question : 2FEFP - If force, length, and time are selected as the three fundamental dimensions, the units of mass in the SI system could be written as: (A) FT2 /L (B) FL/T2 (C) N s 2 /m (D) N m/s2
- Question : 3FEEP - If force, length, and time are selected as the three fundamental dimensions, the units of mass in the SI system could be written as: (A) FT2 /L (B) FL/T2 (C) N s 2 /m (D) N m/s2
- Question : 4FEEP - If force, length, and time are selected as the three fundamental dimensions, the units of mass in the SI system could be written as: (A) FT2 /L (B) FL/T2 (C) N s 2 /m (D) N m/s2
- Question : 5FEEP - A 4200-N force acts on a 250-cm area at an angle of 30
- Question : 6FEEP - The temperature at 11 000 m in the standard atmosphere, using a parabolic interpolation of the entries in Table B.3, is nearest: (A) 62.4
- Question : 7FEEP - The temperature at 11 000 m in the standard atmosphere, using a parabolic interpolation of the entries in Table B.3, is nearest: (A) 62.4
- Question : 8FEEP - The velocity distribution in a 4-cm-diameter pipe transporting 20
- Question : 9FEEP - The distance 20
- Question : 10FEEP - Which of the following is an intensive property? (A) Kinetic energy (B) Enthalpy (C) Density (D) Momentum
- Question : 11FEEP - Five 40-cm3 ice cubes completely melt in 2 liters of warm water (it takes 320 kJ to melt a kilogram of ice). The temperature drop in the water is nearest: (A) 10
- Question : 12FEEP - Five 40-cm3 ice cubes completely melt in 2 liters of warm water (it takes 320 kJ to melt a kilogram of ice). The temperature drop in the water is nearest: (A) 10
- Question : 13FEEP - The speed of sound of a dog whistle in the atmosphere at a location where the temperature is 50
- Question : 1P - State the three basic laws that are used in the study of the mechanics of fluids. State at least one global (integral) quantity that occurs in each. State at least one quantity that may be defined at a point that occurs in each
- Question : 2P - State the three basic laws that are used in the study of the mechanics of fluids. State at least one global (integral) quantity that occurs in each. State at least one quantity that may be defined at a point that occurs in each
- Question : 3P - Express the dimensions of the following quantities using the F-L-T system: (a) Density (b) Pressure (c) Power (d) Energy (e) Mass flux (f) Flow rate
- Question : 4P - Recognizing that all terms in an equation must have the same dimensions, determine the dimensions on the constants in the following equations: (a) d 4.9 t 2 where d is distance and t is time. (b) F 9.8 m where F is a force and m is mass. (c) Q 80AR2/3 S0 1/2 where A is area, R is a radius, S0 is a slope and Q is a flow rate with dimensions of L3 /T
- Question : 5P - Determine the units on each of the constants in the following equations, recognizing that all terms in an equation have the same dimensions: (a) d 4.9 t 2 where d is in meters and t is in seconds. (b) F 9.8 m where F is in newtons and m is in kilograms. (c) Q 80AR2/3S0 1/2 where A is in meters squared, R is in meters, S0 is the slope, and Q has units of meters cubed per second.
- Question : 6P - Determine the units on each of the constants in the following equations, recognizing that all terms in an equation have the same dimensions: (a) d 4.9 t 2 where d is in meters and t is in seconds. (b) F 9.8 m where F is in newtons and m is in kilograms. (c) Q 80AR2/3S0 1/2 where A is in meters squared, R is in meters, S0 is the slope, and Q has units of meters cubed per second.
- Question : 7P - Determine the units on c, k and f(t) in m d dt 2 y 2 c d d y t ky f(t) if m is in kilograms, y is in meters, and t is in seconds
- Question : 8P - Write the following with the use of prefixes: (a) 2.5 105 N (b) 5.72 1011 Pa (c) 4.2 10 8 Pa (d) 1.76 10 5 m3 (e) 1.2 10 4 m2 (f) 7.6 10 8 m
- Question : 9P - Write the following with the use of powers; do not use a prefix: (a) 125 MN (b) 32.1 s (c) 0.67 GPa (d) 0.0056 mm3 (e) 520 cm2 (f) 7.8 km3
- Question : 10P - Rewrite Eq. 1.3.3 using the English units of Table 1.1.
- Question : 11P - Using the table of conversions on the inside front cover, express each of the following in the SI units of Table 1.2: (a) 20 cm/hr (b) 2000 rpm (c) 500 hp (d) 100 ft3 /min (e) 2000 kN/cm2 (f) 4 slug/min (g) 500 g/L (h) 500 kWh
- Question : 12P - What net force is needed to accelerate a 10-kg mass at the rate of 40 m/s2 (neglect all friction): (a) Horizontally? (b) Vertically upward? (c) On an upward slope of 30
- Question : 13P - A particular body weighs 60 lb on earth. Calculate its weight on the moon, where g 5.4 ft/sec2
- Question : 14P - Calculate the mean free path in the atmosphere using Eq. 1.3.3 and Table B.3 in the Appendix at an elevation of: (a) 30 000 m (b) 50 000 m (c) 80 000 m
- Question : 15P - A gage pressure of 52.3 kPa is read on a gage. Find the absolute pressure if the elevation is: (a) At sea level (b) 1000 m (c) 5000 m (d) 10 000 m (e) 30 000 m
- Question : 16P - A vacuum of 31 kPa is measured in an airflow at sea level. Find the absolute pressure in: (a) kPa (b) mm Hg (c) psi (d) ft H2O (e) in. H
- Question : 17P - For a constant-temperature atmosphere, the pressure as a function of elevation is given by p(z) p0e gz/RT, where g is gravity, R 287 J/kg K, and T is the absolute temperature. Use this equation and estimate the pressure at 4000 m assuming that p0 101 kPa and T 15
- Question : 18P - Estimate the pressure and temperature at an elevation of 22,560 ft using Table B.3
- Question : 19P - Estimate the pressure and temperature at an elevation of 22,560 ft using Table B.3
- Question : 20P - An applied force of 26.5 MN is distributed uniformly over a 152-cm2 area; however, it acts at an angle of 42
- Question : 21P - The force on an area of 0.2 cm2 is due to a pressure of 120 kPa and a shear stress of 20 Pa, as shown in Fig. P1.34. Calculate the magnitude of the force acting on the area and the angle of the force with respect to a normal coordinate.
- Question : 22P - Calculate the density and specific weight of water if 0.2 slug occupies 180 in3
- Question : 23P - Use Eq. 1.5.3 to determine the density and specific gravity of water at 70
- Question : 24P - Use Eq. 1.5.3 to determine the density and specific gravity of water at 70
- Question : 25P - The specific weight of an unknown liquid is 12 400 N/m3 . What mass of the liquid is contained in a volume of 500 cm3 ? Use: (a) The standard value of gravity. (b) The minimum value of gravity on the earth. (c) The maximum value of gravity on the earth.
- Question : 26P - The specific weight of an unknown liquid is 12 400 N/m3 . What mass of the liquid is contained in a volume of 500 cm3 ? Use: (a) The standard value of gravity. (b) The minimum value of gravity on the earth. (c) The maximum value of gravity on the earth.
- Question : 27P - In combustion systems that burn hydrocarbon fuels, the carbon dioxide gas that is produced eventually escapes to the atmosphere thereby contributing to global warming. Calculate the density, specific weight, viscosity, and kinematic viscosity of carbon dioxide at a pressure of 200 kPa absolute and 90
- Question : 28P - In a single cylinder engine a piston without rings is designed to slide freely inside the vertical cylinder. Lubrication between the piston and cylinder is maintained by a thin oil film. Determine the velocity with which the 120-mm-diameter piston will fall inside the 120.5-mm-diameter cylinder. The 350-g piston is 10 cm long. The lubricant is SAE 10W-30 oil at 60
- Question : 29P - In a single cylinder engine a piston without rings is designed to slide freely inside the vertical cylinder. Lubrication between the piston and cylinder is maintained by a thin oil film. Determine the velocity with which the 120-mm-diameter piston will fall inside the 120.5-mm-diameter cylinder. The 350-g piston is 10 cm long. The lubricant is SAE 10W-30 oil at 60
- Question : 30P - In a single cylinder engine a piston without rings is designed to slide freely inside the vertical cylinder. Lubrication between the piston and cylinder is maintained by a thin oil film. Determine the velocity with which the 120-mm-diameter piston will fall inside the 120.5-mm-diameter cylinder. The 350-g piston is 10 cm long. The lubricant is SAE 10W-30 oil at 60
- Question : 31P - The velocity distribution in a 1.0-cm-diameter pipe is given by u(r) 16(1 r2 /r2 0) m/s, where r0 is the pipe radius. Calculate the shearing stress at the centerline, at r 0.25 cm, and at the wall if water at 20
- Question : 32P - For two 0.2-m-long rotating concentric cylinders, the velocity distribution is given by u(r) 0.4/r 1000r m/s. If the diameters of the cylinders are 2 cm and 4 cm, respectively, calculate the fluid viscosity if the torque on the inner cylinder is measured to be 0.0026 N m
- Question : 33P - A 4-ft-long, 1-in.-diameter shaft rotates inside an equally long cylinder that is 1.02 in. in diameter. Calculate the torque required to rotate the inner shaft at 2000 rpm if SAE-30 oil at 70
- Question : 34P - A 60-cm-wide belt moves at 10 m/s, as shown in Fig. P1.47. Calculate the horsepower requirement assuming a linear velocity profile in the 10
- Question : 35P - A 6-in.-diameter horizontal disk rotates a distance of 0.08 in. above a solid surface. Water at 60
- Question : 36P - Calculate the torque needed to rotate the cone shown in Fig. P1.49 at 2000 rpm if SAE-30 oil at 40
- Question : 37P - A free-body diagram of the liquid between a moving belt and a fixed wall shows that the shear stress in the liquid is constant. If the temperature varies according to T(y) K/y, where y is measured from the wall (the temperature at the wall is very large), what would be the shape of the velocity profile if the viscosity varies according to Andrade
- Question : 39P - The viscosity of water at 20
- Question : 40P - Show that dr/r dV/V, as was assumed in Eq. 1.5.11
- Question : 41P - What is the volume change of 2 m3 of water at 20
- Question : 42P - Two engineers wish to estimate the distance across a lake. One pounds two rocks together under water on one side of the lake and the other submerges his head and hears a small sound 0.62 s later, as indicated by a very accurate stopwatch. What is the distance between the two engineers?
- Question : 43P - A pressure is applied to 20 L of water. The volume is observed to decrease to 18.7 L. Calculate the applied pressure
- Question : 44P - Calculate the speed of propagation of a smallamplitude wave through water at: (a) 40
- Question : 45P - The change in volume of a liquid with temperature is given by V aTV T, where aT is the coefficient of thermal expansion. For water at 40
- Question : 46P - of 40
- Question : 47P - Calculate the pressure in the small 10- m-diameter droplets that are formed by spray machines. Assume the properties to be the same as water at 15
- Question : 48P - Calculate the pressure in the small 10- m-diameter droplets that are formed by spray machines. Assume the properties to be the same as water at 15
- Question : 49P - Calculate the pressure in the small 10- m-diameter droplets that are formed by spray machines. Assume the properties to be the same as water at 15
- Question : 50P - Determine the height that 20
- Question : 51P - Mercury makes an angle of 130
- Question : 52P - Find an expression for the rise of liquid between two parallel plates a distance t apart. Use a contact angle b and surface tension s
- Question : 53P - Write an expression for the maximum diameter d of a needle of length L that can float in a liquid with surface tension s. The density of the needle is r
- Question : 54P - Would a 7-cm-long 4-mm-diameter steel needle be able to float in 15
- Question : 55P - Find an expression for the maximum vertical force F needed to lift a thin wire ring of diameter D slowly from a liquid with surface tension s.
- Question : 56P - Find an expression for the maximum vertical force F needed to lift a thin wire ring of diameter D slowly from a liquid with surface tension s.
- Question : 57P - Water is transported through the pipe of Fig. P1.68 such that a vacuum of 80 kPa exists at a particular location. What is the maximum possible temperature of the water? Use patm 92 kPa
- Question : 58P - A group of explorers desired their elevation. An engineer boiled water and measured the temperature to be 82
- Question : 59P - A tank half-filled with 40
- Question : 60P - Water is forced through a contraction causing low pressure. The water is observed to
- Question : 61P - Oil is transported through a pipeline by a series of pumps that can produce a pressure of 10 MPa in the oil leaving each pump. The losses in the pipeline cause a pressure drop of 600 kPa each kilometer. What is the maximum possible spacing of the pumps?
- Question : 62P - Determine the density and the specific gravity of air at standard conditions (i.e., 15
- Question : 63P - Calculate the density of air inside a house and outside a house using 20
- Question : 64P - A 15-ft3 air tank is pressurized to 750 psia. When the temperature reaches 10
- Question : 65P - Estimate the weight of air contained in a classroom that measures 10 m 20 m 4 m. Assume reasonable values for the variables
- Question : 66P - A car tire is pressurized to 35 psi in Michigan when the temperature is 10
- Question : 67P - The mass of all the air in the atmosphere contained above a 1-m2 area is to be contained in a spherical volume. Estimate the diameter of the sphere if the air is at standard conditions.
- Question : 68P - A body falls from rest. Determine its velocity after 10 ft and 20 ft, using the energy equation
- Question : 69P - Determine the final velocity of the 15-kg mass of Fig. P1.80 moving horizontally if it starts at 10 m/s and moves a distance of 10 m while the following net force acts in the direction of motion (where s is the distance in the direction of motion): (a) 200 N (b) 20s N (c) 200 cos (sp/20) N
- Question : 70P - The 10-kg mass shown in Fig. P1.81 is traveling at 40 m/s and strikes a plunger that is attached to a piston. The piston compresses 0.2 kg of air contained in a cylinder. If the mass is brought to rest, calculate the maximum rise of temperature in the air. What effects could lead to a lower temperature rise?
- Question : 71P - The 10-kg mass shown in Fig. P1.81 is traveling at 40 m/s and strikes a plunger that is attached to a piston. The piston compresses 0.2 kg of air contained in a cylinder. If the mass is brought to rest, calculate the maximum rise of temperature in the air. What effects could lead to a lower temperature rise?
- Question : 72P - A fuel mass of 0.2 kg contains 40 MJ/kg of energy. Calculate the temperature rise of 100 kg of water if complete combustion occurs and the water, which surrounds the fuel, is completely insulated from the surroundings.
- Question : 73P - A fuel mass of 0.2 kg contains 40 MJ/kg of energy. Calculate the temperature rise of 100 kg of water if complete combustion occurs and the water, which surrounds the fuel, is completely insulated from the surroundings.
- Question : 74P - A fuel mass of 0.2 kg contains 40 MJ/kg of energy. Calculate the temperature rise of 100 kg of water if complete combustion occurs and the water, which surrounds the fuel, is completely insulated from the surroundings.
- Question : 75P - Heat is transferred to 2 kg of air in a cylinder so that the temperature doubles while the pressure remains constant. What work is required if the initial temperature is: (a) 60
- Question : 76P - Air flows from a tank maintained at 5 MPa absolute and 20
- Question : 77P - An airstream flows with no heat transfer such that the temperature changes from 20
- Question : 78P - Air is compressed in an insulated cylinder from 20
- Question : 79P - Calculate the speed of sound at 20
- Question : 80P - Compare the speed of sound in the atmosphere at an elevation of 10 000 m with that at sea level by calculating a percentage decrease.
- Question : 81P - A lumberman, off in the distance, is chopping with an axe. An observer, using her digital stopwatch, measures a time of 8.32 s from the instant the axe strikes the tree until the sound is heard. How far is the observer from the lumberman if: (a) T 20

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