Homework Answers
Add Answer to:
Question 12 1 pts Suppose you have access to a pipe of flowing hot water at...
You have a geothermal source of energy where you can access 100 L/s of hot water...
You have a geothermal source of energy where you can access 100 L/s of hot water at 90oC. If you operate a heat engine that operates at 70% of the maximum theoretical efficiency of a heat engine, how much energy could be produced in 1 year? Assume that the heat engine can use the nearby ocean (8 oC) as its cold source (4 marks)?
Question 12 1 pts In a shower, cold water at 10 °C flowing at a rate...
Question 12 1 pts In a shower, cold water at 10 °C flowing at a rate of 5 kg/min is mixed with hot water at 60°C flowing at a rate of 2 kg/min. The exit temperature, in °C, of the mixture is: 14.1 19.3 30.3 320 24.3 26.4 28.0 343
system, hot water at an average temperature of 80°C is flowing through a 15-m section of...
system, hot water at an average temperature of 80°C is flowing through a 15-m section of a cast In a heating iron pipe (k 50 W/m K) whose inner and outer diameters are 4 cm and 5 cm, respectively. The outer surface of the pipe, whose emissivity is 0.75, is exposed to the cold air at 10°C in the basement. with a heat transfer coefficient of 15 W/m2.K. The heat transfer coefficient at the inner surface of the pipe is...
Hot CO2 gas at a temperature T-1 = 250°C is flowing through a steel pipe (kı...
Hot CO2 gas at a temperature T-1 = 250°C is flowing through a steel pipe (kı = 70 W/(m.K)) whose inner and outer radiuses are 12 cm and 14 cm, respectively, in a cold environment at Tm2 = -10°C. As shown in the figure below, the steel pipe is insulated with 7.0 cm thick spray-foam insulation (k2 = 0.03 W/(m.K)) and 5.0 cm thick glassfiber insulation (k3 = 0.05 W/(m.K)). Consider the heat transfer coefficients of CO2 gas and the...
Question 12 PHYSICS 120 (a) Carefully explain the difference between irreversible and reversible processes. Also explain...
Question 12 PHYSICS 120 (a) Carefully explain the difference between irreversible and reversible processes. Also explain what the second law of thermodynamics dictates about reversible processes. (You may find it helpful to compare water freezing at 0 °C and super- cooled water freezing at-5 °C.) [5 marks A heat engine operates with an efficiency n = 0.30 between two energy reservoirs at temperatures of 450 K and 293 K. The engine does 90 J of work per cycle. (b) Draw...
D Question 1 1 pts An adiabatic heat exchanger is used to heat cold water at...
D Question 1 1 pts An adiabatic heat exchanger is used to heat cold water at 12 °C entering at a rate of 4 kg/s by hot water entering at 95°C at rate of 2.5 kg/s. The specific heat of water is C_w 4.18 kJ/kg- C. If the exit temperature of hot water is 50 °C, the exit temperature of cold water is O 50 °C 90 °C 95 °C 57 °C 40 °C
1 pts Cold water at 10°C flowing a rate of 2 kg/s is heated to 35°C...
1 pts Cold water at 10°C flowing a rate of 2 kg/s is heated to 35°C inside a heat exchanger by saturated steam. The steam enters the heat exchanger as saturated vapor at 100 kPa and leaves as saturated liquid at the same pressure. The heat exchanger losses heat at a rate of 20 KW. The mass flow rate of the steam is most nearly: 0.185 0.101 0.748 0.548 0.312 0.243 0.443 0.085
Question 5 1 pts Water is flowing through a circular pipe with a radius of 0.40...
Question 5 1 pts Water is flowing through a circular pipe with a radius of 0.40 m at 4.50 m/s. If the pipe's radius tapers down to 0.30 m, what is the speed of water through the narrower end? Answer in m/s. O 8.75 o 7.65 o 5.10 O 6.00 o 7.00 O 8.00 Question 6
1 pts Question 5 Water is flowing through a circular pipe with a radius of 0.50...
1 pts Question 5 Water is flowing through a circular pipe with a radius of 0.50 m at 5.60 m/s. If the pipe's radius tapers down to 0,40 m, what is the speed of water through the narrower end? Answer in m/s. 8.73 8.00 6.00 7.65 05.10 7.00 1 pts Question 6 Hide Stop sharing ard" Il app.honorlock.com is sharing your screen. MacBook Pro с o G Search or type URL ☆ 8
D Question 2 1 pts Hot and cold water pipes 8 m long run parallel to...
D Question 2 1 pts Hot and cold water pipes 8 m long run parallel to each other in a thick concrete layer. The diameters of both pipes are 7 cm, and the distance between the centerlines of the pipes is 37 cm. The surface temperatures of the hot and cold pipes are 54°C and 14°C, respectively. Taking the thermal conductivity of the concrete to be k = 0.75 W/m • °C, determine the rate of heat transfer in Watts...
Question 12 1 pts In a shower, cold water at 10 °C flowing at a rate of 5 kg/min is mixed with hot water at 60°C flowing at a rate of 2 kg/min. The exit temperature, in °C, of the mixture is: 14.1 19.3 30.3 320 24.3 26.4 28.0 343
system, hot water at an average temperature of 80°C is flowing through a 15-m section of a cast In a heating iron pipe (k 50 W/m K) whose inner and outer diameters are 4 cm and 5 cm, respectively. The outer surface of the pipe, whose emissivity is 0.75, is exposed to the cold air at 10°C in the basement. with a heat transfer coefficient of 15 W/m2.K. The heat transfer coefficient at the inner surface of the pipe is...
Hot CO2 gas at a temperature T-1 = 250°C is flowing through a steel pipe (kı = 70 W/(m.K)) whose inner and outer radiuses are 12 cm and 14 cm, respectively, in a cold environment at Tm2 = -10°C. As shown in the figure below, the steel pipe is insulated with 7.0 cm thick spray-foam insulation (k2 = 0.03 W/(m.K)) and 5.0 cm thick glassfiber insulation (k3 = 0.05 W/(m.K)). Consider the heat transfer coefficients of CO2 gas and the...
Question 12 PHYSICS 120 (a) Carefully explain the difference between irreversible and reversible processes. Also explain what the second law of thermodynamics dictates about reversible processes. (You may find it helpful to compare water freezing at 0 °C and super- cooled water freezing at-5 °C.) [5 marks A heat engine operates with an efficiency n = 0.30 between two energy reservoirs at temperatures of 450 K and 293 K. The engine does 90 J of work per cycle. (b) Draw...
D Question 1 1 pts An adiabatic heat exchanger is used to heat cold water at 12 °C entering at a rate of 4 kg/s by hot water entering at 95°C at rate of 2.5 kg/s. The specific heat of water is C_w 4.18 kJ/kg- C. If the exit temperature of hot water is 50 °C, the exit temperature of cold water is O 50 °C 90 °C 95 °C 57 °C 40 °C
1 pts Cold water at 10°C flowing a rate of 2 kg/s is heated to 35°C inside a heat exchanger by saturated steam. The steam enters the heat exchanger as saturated vapor at 100 kPa and leaves as saturated liquid at the same pressure. The heat exchanger losses heat at a rate of 20 KW. The mass flow rate of the steam is most nearly: 0.185 0.101 0.748 0.548 0.312 0.243 0.443 0.085
Question 5 1 pts Water is flowing through a circular pipe with a radius of 0.40 m at 4.50 m/s. If the pipe's radius tapers down to 0.30 m, what is the speed of water through the narrower end? Answer in m/s. O 8.75 o 7.65 o 5.10 O 6.00 o 7.00 O 8.00 Question 6
1 pts Question 5 Water is flowing through a circular pipe with a radius of 0.50 m at 5.60 m/s. If the pipe's radius tapers down to 0,40 m, what is the speed of water through the narrower end? Answer in m/s. 8.73 8.00 6.00 7.65 05.10 7.00 1 pts Question 6 Hide Stop sharing ard" Il app.honorlock.com is sharing your screen. MacBook Pro с o G Search or type URL ☆ 8
D Question 2 1 pts Hot and cold water pipes 8 m long run parallel to each other in a thick concrete layer. The diameters of both pipes are 7 cm, and the distance between the centerlines of the pipes is 37 cm. The surface temperatures of the hot and cold pipes are 54°C and 14°C, respectively. Taking the thermal conductivity of the concrete to be k = 0.75 W/m • °C, determine the rate of heat transfer in Watts...
Most questions answered within 3 hours.
-
In 2017, Juan entered into a contract to write a book. The
publisher advanced Juan $50,000,...
asked 7 minutes ago -
Determine the number of kinds of protons in each molecule (w/
respect to NMR spectroscopy). Drawing...
asked 17 minutes ago -
A jeweler whose near point is 68 cm from his eye uses a
magnifying glass as...
asked 15 minutes ago -
A company wants to determine how many units of each of two
products, A and B,...
asked 19 minutes ago -
The blood pressure of a person changes throughout the day.
Suppose the systolic blood pressure of...
asked 28 minutes ago -
A chemistry student desired to study sulfur. Sulfur exhibited
the following characteristics with oxygen:
(a) It...
asked 24 minutes ago -
An Atwood machine is constructed of a solid-disk frictionless
pulley of mass m3 and radius R....
asked 25 minutes ago -
what are the advantages of lanthanum hexaboride over tungsten
filament for electron emission
what is the...
asked 27 minutes ago -
Question 5
Your uncle offers to sell you his vintage Rolls Royce. He
suggests a payment...
asked 32 minutes ago -
Quality grading of beef products as Prime, Choice, Select. What
type of data?
A) ratio
B)...
asked 41 minutes ago -
For the following unbalanced reaction at 0.800
atm and 34.5°C:
MoS2(s) + O2(g) → MoO3(s) +...
asked 49 minutes ago -
When 12 mL of 0.2 M NaOH is added to 25 mL of 0.15 M HCl,...
asked 53 minutes ago