Homework Answers
Add Answer to:
I-10. Air flows past a 50 mm diameter sphere at 30 m/s. What is most nearly...
Air at 25°C flows over a 10-mm-diameter sphere with a velocity of 30 m/s, while the...
Air at 25°C flows over a 10-mm-diameter sphere with a velocity of 30 m/s, while the surface of the sphere is maintained at 75°C. What is the rate of heat transfer from the sphere?
Problem 7.054 Air at 25°C flows over a 9-mm-diameter sphere with a velocity of 20 m/s,...
Problem 7.054 Air at 25°C flows over a 9-mm-diameter sphere with a velocity of 20 m/s, while the surface of the sphere is maintained at 75°C. What is the rate of heat transfer from the sphere? tPatheaticalsnctions
A spherical raindrop 3.3 mm in diameter falls through a vertical distance of 4000 m. Take...
A spherical raindrop 3.3 mm in diameter falls through a vertical distance of 4000 m. Take the cross-sectional area of a raindrop ,drag coefficient 0.45, density of water to be 1000 kg/m3, and density of air to be 1.2 kg/m3. (a) Calculate the speed a spherical raindrop would achieve falling from 4000 m in the absence of air drag 280 m/s (b) What would its speed be at the end of 4000 m when there is air drag? 1.091 What...
A spherical raindrop 1.9 mm in diameter falls through a vertical distance of 4150 m. Take...
A spherical raindrop 1.9 mm in diameter falls through a vertical distance of 4150 m. Take the cross-sectional area of a raindrop = πr2, drag coefficient = 0.45, density of water to be 1000 kg/m3, and density of air to be 1.2 kg/m3. (a) Calculate the speed a spherical raindrop would achieve falling from 4150 m in the absence of air drag. _________ m/s (b) What would its speed be at the end of 4150 m when there is air...
4 Air (with density 6.08 k3 and viscosity coefficient 2.95 x 10 Pa.s) at an average pressure of 10 bar and a bulk temperature of 600 K flows through a 0.5 m long, 20 mm internal diameter circular tub...
4 Air (with density 6.08 k3 and viscosity coefficient 2.95 x 10 Pa.s) at an average pressure of 10 bar and a bulk temperature of 600 K flows through a 0.5 m long, 20 mm internal diameter circular tube at 3.0 m3 hr1. The heat flux from the tube wall is 10 kW m2. Calculate the heat transfer coefficient and the inside wall temperature of the tube. [Nu0.023 Re08 Pr04; Pr 0.69] [20 marks]
4 Air (with density 6.08 k3...
Oil flows with a velocity of 4 m/s through a 30 mm diameter tube. A model...
Oil flows with a velocity of 4 m/s through a 30 mm diameter tube. A model of this system is to be developed using standard air as the model fluid The air velocity is to be 2 m/s What tube diameter is required for the model if dynamic similarity is to be maintained between model and prototype? Kinematic viscosity of air = 1.6 x 10-5 m2/s, Kinematic viscosity of oil = 1.2 x 10-3 m2/s 0.45 mm 0.8 mm 4.5...
I. The mass of baseball is m = 145 g and and diameter D 72.8 mm....
I. The mass of baseball is m = 145 g and and diameter D 72.8 mm. For a baseball in air, the drag depends on the square of the speed, f- -c2v|v. The coefficient of friction scales with the diameter D, c2 0.22D2 1.2 x 103 kg/m. For all parts, assume that the ball drops vertically, and plot the acceleration, velocity, and height as a function of time (a) If you were to drop this out of the international space...
Question 4 Oil flows with a velocity of 4 m/s through a 30 mm diameter tube....
Question 4 Oil flows with a velocity of 4 m/s through a 30 mm diameter tube. A model of this system is to be developed using standard air as the model fluid. The air velocity is to be 2 m/s. What tube diameter is required for the model if dynamic similarity is to be maintained between model and prototype? Kinematic viscosity of air = 16 x 105 m2/s, Kinematic viscosity of oil 1,2 x 103 m2/s 0.45 mm 0.8 mm...
Air flows at 30 ° C at a uniform speed of 23 m / s along...
Air flows at 30 ° C at a uniform speed of 23 m / s along a smooth flat plate. Calculate the approximate location x along the plate where the boundary layer is likely to be completely turbulent. Air density and viscosity at T = 30 °C are 1.164 kg / m3 and 1.872 x 10-5 kg / m, respectively. The critical Reynolds number is 100,000 and the turbulent flow begins at 30 times the critical Reynolds number. 20:19 small...
Q2 (a) A 12 mm diameter mild steel sphere (k = 42.5 W/m K) is exposed...
Q2 (a) A 12 mm diameter mild steel sphere (k = 42.5 W/m K) is exposed to cooling airflow at 27 "C resulting in the convective coefficient, h = 114 W/m' K. The relevant properties of mild steel are given as follows: Density p= 7850 kg/m . Specific heat c = 475 J/kg K and thermal diffusivity a = 0.043 m/hr Determine: (i) Time required to cool the sphere (lumped parameter system) from 540 °C to 95°C. [7 marks] (ii)...
Problem 7.054 Air at 25°C flows over a 9-mm-diameter sphere with a velocity of 20 m/s, while the surface of the sphere is maintained at 75°C. What is the rate of heat transfer from the sphere? tPatheaticalsnctions
A spherical raindrop 3.3 mm in diameter falls through a vertical distance of 4000 m. Take the cross-sectional area of a raindrop ,drag coefficient 0.45, density of water to be 1000 kg/m3, and density of air to be 1.2 kg/m3. (a) Calculate the speed a spherical raindrop would achieve falling from 4000 m in the absence of air drag 280 m/s (b) What would its speed be at the end of 4000 m when there is air drag? 1.091 What...
4 Air (with density 6.08 k3 and viscosity coefficient 2.95 x 10 Pa.s) at an average pressure of 10 bar and a bulk temperature of 600 K flows through a 0.5 m long, 20 mm internal diameter circular tube at 3.0 m3 hr1. The heat flux from the tube wall is 10 kW m2. Calculate the heat transfer coefficient and the inside wall temperature of the tube. [Nu0.023 Re08 Pr04; Pr 0.69] [20 marks]
4 Air (with density 6.08 k3...
Oil flows with a velocity of 4 m/s through a 30 mm diameter tube. A model of this system is to be developed using standard air as the model fluid The air velocity is to be 2 m/s What tube diameter is required for the model if dynamic similarity is to be maintained between model and prototype? Kinematic viscosity of air = 1.6 x 10-5 m2/s, Kinematic viscosity of oil = 1.2 x 10-3 m2/s 0.45 mm 0.8 mm 4.5...
I. The mass of baseball is m = 145 g and and diameter D 72.8 mm. For a baseball in air, the drag depends on the square of the speed, f- -c2v|v. The coefficient of friction scales with the diameter D, c2 0.22D2 1.2 x 103 kg/m. For all parts, assume that the ball drops vertically, and plot the acceleration, velocity, and height as a function of time (a) If you were to drop this out of the international space...
Question 4 Oil flows with a velocity of 4 m/s through a 30 mm diameter tube. A model of this system is to be developed using standard air as the model fluid. The air velocity is to be 2 m/s. What tube diameter is required for the model if dynamic similarity is to be maintained between model and prototype? Kinematic viscosity of air = 16 x 105 m2/s, Kinematic viscosity of oil 1,2 x 103 m2/s 0.45 mm 0.8 mm...
Air flows at 30 ° C at a uniform speed of 23 m / s along a smooth flat plate. Calculate the approximate location x along the plate where the boundary layer is likely to be completely turbulent. Air density and viscosity at T = 30 °C are 1.164 kg / m3 and 1.872 x 10-5 kg / m, respectively. The critical Reynolds number is 100,000 and the turbulent flow begins at 30 times the critical Reynolds number. 20:19 small...
Q2 (a) A 12 mm diameter mild steel sphere (k = 42.5 W/m K) is exposed to cooling airflow at 27 "C resulting in the convective coefficient, h = 114 W/m' K. The relevant properties of mild steel are given as follows: Density p= 7850 kg/m . Specific heat c = 475 J/kg K and thermal diffusivity a = 0.043 m/hr Determine: (i) Time required to cool the sphere (lumped parameter system) from 540 °C to 95°C. [7 marks] (ii)...
Most questions answered within 3 hours.
-
Q. A buffer solution prepared by mixing 50.00 mL of 0.200 M
acetic acid and 50.00...
asked 8 minutes ago -
PLEASE DO BOTH OF THESE IN PYTHON!!! AND MAKE SURE THAT
I CAN COPY THE CODE....
asked 7 minutes ago -
While fishing you discover two types of mullet. Some
of the mullet jump out of the water...
asked 4 minutes ago -
4. How could the Fed "finance the government's debt"? How does
that work, exactly?
5. In...
asked 10 minutes ago -
The x component of the velocity of an object vibrating
along the x-axis obeys the equation...
asked 1 hour ago -
A junction box contains two trade size 2 raceways on the left
side, and two trade...
asked 1 hour ago -
Atmospheric Mass
Venus and Earth have about the same mass and radius, but the
atmospheric pressure...
asked 2 hours ago -
5. Discuss the use of fault tree analysis (FTA) for risk
assessment (maximum one paragraph).
asked 3 hours ago -
Given that a sample of aluminium oxide has a Young's modulus of
393 GPa and a...
asked 5 hours ago -
At a certain temperature, the equilibrium constant, Kc, for this
reaction is 53.3.
H2(g)+I2(g)−⇀↽−2HI(g)Kc=53.3
At this...
asked 6 hours ago -
Question1 ) The STL provides similiar classes called stack and
queue, both of which gave functions...
asked 7 hours ago -
For Questions 1-4, assume you have 5 bits available:
1. For (positive) integers: What is the...
asked 7 hours ago