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A cryogenic probe is used to treat cancerous skin tissue. The probe consists of a single round jet of diameter
Assuming the cancerous skin tissue to be a semi-infinite medium with
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- Air is flowing in a duct as shown in the figure below. A Pitot-static tube and a thermocouple are inserted into the flow stream as shown. Calculate the air velocity and the air-mass flowrate. The area of the duct is 1 ft², and the temperature of the control volume x is 40°F. V = m = i x ft/s lbm/s A Ps = 3 psig Po = 15 psigarrow_forwardThe 100-mm diameter pipe is connected by a nozzle to a large reservoir of air that is at a temperature of 20 °C and absolute pressure of 500 kPa The backpressure causes M,> 1, and the flow is choked at the exit, section 2, when L=5 m. Assume a constant friction factor of 0.0085 throughout the pipe, Gas constant for air is R-286 9 J/kg-K) and its specific heat ratio is k-140 (Figure 1) Figure 100mm < 1 of 1 1. T Part A Determine the mass flow through the pipe Express your answer using three significant figures. Submit VAE 1 vec Provide Feedback Request Answer D kg/sarrow_forwardGiven the 0.063 m length of the syringe. F=1N a. provide an equation to calculate its water flow rate if water is going to travel from a 0.063 m length of syringe with dextrose tube length of 0.5 meter to another 0.063 m syringe (see attached photo). The Inner diameter of the syringe is 0.02. While the inner diameter of dextrose tube is 0.003. b. provide an equation in order to calculate the maximum force or pressure that exerts in plunger in order to travel the water at its maximum speed.arrow_forward
- A blower supplies standard air to a plenum that feeds twohorizontal square sheet-metal ducts with sharp-edged entrances.One duct is 100 ft long, with a cross-section 6 in by6 in. The second duct is 200 ft long. Each duct exhausts tothe atmosphere. When the plenum pressure is 5.0 lbf/ft2(gage) the volume flow in the longer duct is three times theflow in the shorter duct. Estimate both volume flows andthe cross-section size of the longer duct.arrow_forwardWater is being pumped the through one inch diameter piping arrangement to a higher elevation (5 meters up). Assume incompressible fluid conditions and some heat losses to the surroundings. At the inlet water pressure is 1 bar, temperature 15C, and volumetric flow rate is 0.02 m3/s. At the exit pressure is 2.2 bar, temperature is 10C and velocity of the stream is 40 m/s. Determine: a.Density of the inlet stream using NIST tables. b.Mass flow rate [kg/s] c.Determine h2 from known p2 and T2 using NIST tables d.Find heat rate removed from Q=m(h1-h2) Use Energy Balance Equation with enthalpy difference and in the units of kW to find pumping power in kW. NOTE: The heat is removed from the system, so it should be negative in your equation! show all steps pleasearrow_forwardWater is being pumped the through one inch diameter piping arrangement to a higher elevation (5 meters up). Assume incompressible fluid conditions and some heat losses to the surroundings. At the inlet water pressure is 1 bar, temperature 15C, and volumetric flow rate is 0.02 m3/s. At the exit pressure is 2.2 bar, temperature is 10C and velocity of the stream is 40 m/s. Determine: a.Density of the inlet stream using NIST tables. b.Mass flow rate [kg/s] c.Determine h2 from known p2 and T2 using NIST tables d.Find heat rate removed from Q=m(h1-h2) Use Energy Balance Equation with enthalpy difference and in the units of kW to find pumping power in kW. NOTE: The heat is removed from the system, so it should be negative in your equation!arrow_forward
- Water is being pumped the through one inch diameter piping arrangement to a higher elevation (5 meters up). Assume incompressible fluid conditions and some heat losses to the surroundings. At the inlet water pressure is 1 bar, temperature 15C, and volumetric flow rate is 0.02 m3/s. At the exit pressure is 2.2 bar, temperature is 10C and velocity of the stream is 40 m/s. Determine: a.Density of the inlet stream using NIST tables. b.Mass flow rate [kg/s] c.Determine h2 from known p2 and T2 using NIST tables d.Find heat rate removed from Q=m(h1-h2) Use Energy Balance Equation with enthalpy difference and in the units of kW to find pumping power in kW. NOTE: The heat is removed from the system, so it should be negative in your equation! show all steps please thanksarrow_forwardSketch the shear stress and velocity distribution for laminar flow across a pipe section?arrow_forwardA 0.3 m diam. pipe through which water flows at the rate of 0.283 m°/s suddenly enlarges to 0.6 m in diam. the pipe ils horizontal and the water in connected to the larger pipe stands 0. 36 higher than the level in coefficient K if the shock loss is expressed as KV´/2g, where v is the velocity in the smaller pipe. 8. If the axis of a vertical tube tube connected to the smaller pipe, determine the a (0.496)arrow_forward
- The dimensions of a duct system, supplying air at 20°C to two zones 5 and 6 are shown in Fig. The flow rates to the two zones are 1.4 m³/s and 1.0 m³/s respectively. The fan generates a total pressure of 285 kPa at the entrance section 1. Calculate (a) (i) the velocity pressures in the duct sections, (ii) (ii) the total pressures at all sections from 1 to 6. (b) If a damper is installed just upstream of section 5 to make the total pressures at 5 and 6 equal, calculate the required pressure loss through the damper. From L12 = 45m 2 3 L35 = 40m fan 1.4 m/s 2.4 m/s 4 D12 = 0.6 m L46 = 70m 6. D35 = 0.5 m D46 = 0.4 m 1.0 m/s Fig. El1.2.1 Supply air duct systemarrow_forwardThe ethanol solution is pumped into a vessel 25 m above the reference point through a 25 mm diameter steel pipe at a rate of 8 m3/hour. The length of the pipe is 35m and there are 2 elbows. Calculate the pump power requirement. The properties of the solution are density 975 kg/m3 and viscosity 4x 10-4 Pa s. a. Reynolds number = b. Energy Loss along a straight pipe = J/kg. c. Energy Loss in turns = J/kg. d. Total energy to overcome friction = J/kg. e. Energy to raise water to height = J/kg. f. Theoretical energy requirement of the pump kg ethanol/second = J/kg. g. Actual pump power requirement = watt.arrow_forwardThe properties of the air in the inlet section with A1 = 0.2562 m2 in a converging-diverging channel are given as U1 = 256,2 m/s, T1 = 362 K, P1 = 136,2 kPa (absolute). Find the required cross-sectional area, pressure, temperature, velocity and mass flow rate to obtain sonic (Ma2=1.0) flow at the outlet. Calculate critical values of A*, U*, T*, P*. Solve the problem by making the necessary assumptions and drawing the schematic figure.arrow_forward
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