Homework Answers
Statement is true
With incease in temperature viscosity of a water is decreased that means relative friction between layers is reduced that makes the water easy to be worked of ....
Hence a membrane will have higher flux and be able to treat a greater diacharge at higher temperature because of decreased viscosity
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3. Because of the change in viscosity of water, a membrane design for cold water will...
tafp 150 quiz 3 Viscosity does not change with temperature. A. true B false 2. The...
tafp 150 quiz 3
Viscosity does not change with temperature. A. true B false 2. The primary function of the liquid in hydraulic system is to A. clean system parts B. remove heat from the system C. transmit energy to do the work the system is designed to D. prevent rust and corrosion of system components 3. The amount of friction is constant, even with varying forces pu the surfaces together. A true B. false 4. The cleanliness of the...
A microfiltration membrane was tested in the laboratory and found to have a clean-water flux of...
A microfiltration membrane was tested in the laboratory and found to have a clean-water flux of 6500 L/ m2*h at 23°C and 0.69 bar. a) Calculate the specific flux at 20 °C. b) Calculate the membrane resistance coefficient (you can assume dynamic viscosity as 10-3 kg/m*s). c) Does membrane resistance depend on pressure and temperature used for the tests in lab? Please explain your reasoning. Please show step by step solution. Thank you.
3. Cold-blooded animals change their body temperature depending on the environment temperature. In a cold weather,...
3. Cold-blooded animals change their body temperature depending on the environment temperature. In a cold weather, cellular membrane of cold-blooded animals may have a high amount of ( A ) and phospholipids containing ( B ) to maintain the membrane fluidity (4 pts) Fill the blank A with the specific name of lipid that is the most appropriate. Circle a fatty acid that may be the most appropriate for blank B, among 4 examples below 16:0 16:1 cis 49 18:0...
5. True/False: For a given transfer of energy, a greater change in entropy occurs when the...
5. True/False: For a given transfer of energy, a greater change in entropy occurs when the temperature is high. False, because as temperature decreases there is a greater change in entropy. False, because only heat flow affects the change in entropy, not temperature. True
Instant cold packs used to treat athletic injuries contain solid NH4NO3 and a pouch of water....
Instant cold packs used to treat athletic injuries contain solid NH4NO3 and a pouch of water. When the pack is squeezed, the pouch breaks and the solid dissolves, lowering the temperature because of the endothermic reaction NH4NO3(s)+H2O(l)→NH4NO3(aq) ΔH= +25.7 kJ. What is the final temperature in a squeezed cold pack that contains 43.5 g of NH4NO3 dissolved in 125 mL of water? Assume a specific heat of 4.18J/(g⋅∘C) for the solution, an initial temperature of 29.0 ∘C, and no heat...
1. Energy stored in the phase change of water is called latent heat. a) True b)...
1. Energy stored in the phase change of water is called latent heat. a) True b) False 2. Higher pressure gradient forces (PGF) result in weaker winds. a) True b) False 3. What adiabatic lapse rate do you use when cooling a saturated air parcel? a) Dry adiabatic lapse rate b) Wet adiabatic lapse rate 4. If the amount of water in the atmosphere is held constant, increasing the air temperature will cause the humidity to a) Increase. b) Decrease.
Short A (2 points 1.How does the a shell and tube heat ese U, depend on...
Short A (2 points 1.How does the a shell and tube heat ese U, depend on the mass ow) tb a counter-flow heat exchanger.2 ke's of hot water fows nows on the shell side. Which now wll experience the largest A) cold water hot watet C) The change is the largest temperature change? 3. Liquid A is fed to a t exchanger Thed to a tube of a heat exchanger and the coolant dliquid B) is fed to the shel...
Design of 5kW air cooled type water chiller with R290 as refrigerant with a COP of 2.2 or greater...
Design of 5kW air cooled type water chiller with R290 as refrigerant with a COP of 2.2 or greater , which chills water from a temperature of 20 oC to a temperature of 10 oC, AT A FLOW RATE OF 1000L/HR. Specification symbol value mass flow rate ṁ 1000l/hr Inlet temperature (water) Ti 20oC outlet temperature (water) To 10oC
[10] Design Problem As shown in the figure below, a double-pipe parallel-flow heat exchanger is used...
[10] Design Problem As shown in the figure below, a double-pipe parallel-flow heat exchanger is used to heat cold fluid which is water (Cp = 4180 J/(kg.K), p = 1000 kg/m) from 20°C to 80°C at a rate of 0.15 kg/s. The heating is to be accomplished by hot fluid, which is geothermal water (Cp = 4310 J/(kg.K), p = 1050 kg/m²) available at 130°C at a mass flow rate of 0.25 kg/s. The inner tube has an inner diameter...
A cold object at 3°C is placed in an insulated cup of water at 27°C. Determine...
A cold object at 3°C is placed in an insulated cup of water at 27°C. Determine whether or not each of the following will occur. (a) The increase in temperature of the object will be equal to the decrease in temperature of the water. Answer: (b) Only the object will change temperature. Answer: (c) Only the water will change temperature. Answer: (d) The heat gain by the object will equal the heat lost by the water. Answer: (e) The final...
tafp 150 quiz 3
Viscosity does not change with temperature. A. true B false 2. The primary function of the liquid in hydraulic system is to A. clean system parts B. remove heat from the system C. transmit energy to do the work the system is designed to D. prevent rust and corrosion of system components 3. The amount of friction is constant, even with varying forces pu the surfaces together. A true B. false 4. The cleanliness of the...
3. Cold-blooded animals change their body temperature depending on the environment temperature. In a cold weather, cellular membrane of cold-blooded animals may have a high amount of ( A ) and phospholipids containing ( B ) to maintain the membrane fluidity (4 pts) Fill the blank A with the specific name of lipid that is the most appropriate. Circle a fatty acid that may be the most appropriate for blank B, among 4 examples below 16:0 16:1 cis 49 18:0...
Short A (2 points 1.How does the a shell and tube heat ese U, depend on the mass ow) tb a counter-flow heat exchanger.2 ke's of hot water fows nows on the shell side. Which now wll experience the largest A) cold water hot watet C) The change is the largest temperature change? 3. Liquid A is fed to a t exchanger Thed to a tube of a heat exchanger and the coolant dliquid B) is fed to the shel...
[10] Design Problem As shown in the figure below, a double-pipe parallel-flow heat exchanger is used to heat cold fluid which is water (Cp = 4180 J/(kg.K), p = 1000 kg/m) from 20°C to 80°C at a rate of 0.15 kg/s. The heating is to be accomplished by hot fluid, which is geothermal water (Cp = 4310 J/(kg.K), p = 1050 kg/m²) available at 130°C at a mass flow rate of 0.25 kg/s. The inner tube has an inner diameter...
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