Homework Answers
Air enters a 16-cm-diameter pipe steadily at 200 kPa and 20°C with a velocity of 5...
Air enters a 16-cm-diameter pipe steadily at 200 kPa and 20°C with a velocity of 5 m/s. Air is heated as it flows, and it leaves the pipe at 180 kPa and 38°C. The gas constant of air is 0.287 kPa·m3/kg·K. Whats the volumetric flow rate of the inlet/outlet, mass flow rate and velocity & volume flow rate at the exit?
Suppose the block in part D is made of steel(iron, c = 449 J/kg-K) and has...
Suppose the block in part D is made of steel(iron, c = 449
J/kg-K) and has a mass of 0.500 kg and has an initial temperature
of 300.0°C. The block is placed into the insulated beaker that
holds 50.0 ml of water at 20.0°C. If the metal block were
to cool to 100.0°C, how much energy would be transferred to the
water?
(CONTEXT: A metal block is heated for a long period of time over
a gas flame. The block...
A block of iron ore A of mass m = 350 kg and specific heat capacity...
A block of iron ore A of mass m = 350 kg and specific heat capacity C = 460 kJ/(kg·K) obeys the constitutive relations where T is temperature. The block of metal is initially at temperature T1 = 700 K and it is placed in a perfectly-sealed, constant-pressure container B containing 64 kg of air initially at 320 K and atmospheric pressure 101.3 kPa. The air in container B can be modeled as a perfect gas with specific heat capacity...
Problems 4, 5 & 6 15) A heat-conducting rod, 0.90 m long and wrapped in insulation,...
Problems 4, 5 & 6
15) A heat-conducting rod, 0.90 m long and wrapped in insulation, is made of an aluminum section that is 0.20 m long and a copper section that is 0.20m long. Both sections have a cross- sectional area of 0.00040 m2, The aluminum end and the copper end are maintained at temperatures of 30 C and 230 C respectively. The thermal conductivities of aluminum and copper are 205 W/m K (aluminum) and 385 W/m K (copper)....
Question 1 (3 marks) A concrete highway is built of slabs 12 m long (at 15°C)....
Question 1 (3 marks) A concrete highway is built of slabs 12 m long (at 15°C). How wide should the expansion cracks be- tween the slabs be at 15°C to prevent buckling of the concrete over the range of temperature -30°C to +50°C? The coefficient of thermal expansion for concrete is 12 x 10""(Cº). Question 2 (3+3 = 6 marks) (a) At 18.0°C, a certain quantity of oxygen occupies a volume of 61.5 L at an absolute pressure of 2.45...
i dont understand why the molecular weight i calculated (42.012 g/mol) for my unknown liquid (acetone)...
i dont understand why the molecular weight i calculated
(42.012 g/mol) for my unknown liquid (acetone) is less than the
actual molecular weight (58.08 g/mol). what errors could i have
made in my lab that would account for the difference.
Molecular Weight of a Volatile Liquid In this experiment, an amount of liquid more than sufficient to fill the flask when vaporized is placed in a flask of measured volume and mass. The flask is then heated in a boiling...
summarizr the followung info and write them in your own words and break them into different...
summarizr the followung info and write them in your own words and break them into different key points. 6.5 Metering Chamber: 6.5.1 The minimum size of the metering box is governed by the metering area required to obtain a representative test area for the specimen (see 7.2) and for maintenance of reasonable test accuracy. For example, for specimens incorporating air spaces or stud spaces, the metering area shall span an integral number of spaces (see 5.5). The depth of...
summatize the following info and break them into differeng key points. write them in yojr own...
summatize the following info and break them into differeng key points. write them in yojr own words
apartus
6.1 Introduction—The design of a successful hot box appa- ratus is influenced by many factors. Before beginning the design of an apparatus meeting this standard, the designer shall review the discussion on the limitations and accuracy, Section 13, discussions of the energy flows in a hot box, Annex A2, the metering box wall loss flow, Annex A3, and flanking loss, Annex...
ART II. Case studies (10 points) -Name the genus and species of each of these. 1....
ART II. Case studies (10 points) -Name the genus and species of each of these. 1. A 15-year-old high school student who had no prior known renal disease developed a sore throat and 103 Ffever. The fever and sore throat lasted for three days. Ten days later, he developed hematuria, puffy eyelids, and swollen ankles. He went to a physician, who noted an inflamed pharynx, enlarged and reddened tonsils, and palpable cervical lymph nodes. The patient had pitting edema of...
Suppose the block in part D is made of steel(iron, c = 449
J/kg-K) and has a mass of 0.500 kg and has an initial temperature
of 300.0°C. The block is placed into the insulated beaker that
holds 50.0 ml of water at 20.0°C. If the metal block were
to cool to 100.0°C, how much energy would be transferred to the
water?
(CONTEXT: A metal block is heated for a long period of time over
a gas flame. The block...
Problems 4, 5 & 6
15) A heat-conducting rod, 0.90 m long and wrapped in insulation, is made of an aluminum section that is 0.20 m long and a copper section that is 0.20m long. Both sections have a cross- sectional area of 0.00040 m2, The aluminum end and the copper end are maintained at temperatures of 30 C and 230 C respectively. The thermal conductivities of aluminum and copper are 205 W/m K (aluminum) and 385 W/m K (copper)....
Question 1 (3 marks) A concrete highway is built of slabs 12 m long (at 15°C). How wide should the expansion cracks be- tween the slabs be at 15°C to prevent buckling of the concrete over the range of temperature -30°C to +50°C? The coefficient of thermal expansion for concrete is 12 x 10""(Cº). Question 2 (3+3 = 6 marks) (a) At 18.0°C, a certain quantity of oxygen occupies a volume of 61.5 L at an absolute pressure of 2.45...
i dont understand why the molecular weight i calculated
(42.012 g/mol) for my unknown liquid (acetone) is less than the
actual molecular weight (58.08 g/mol). what errors could i have
made in my lab that would account for the difference.
Molecular Weight of a Volatile Liquid In this experiment, an amount of liquid more than sufficient to fill the flask when vaporized is placed in a flask of measured volume and mass. The flask is then heated in a boiling...
summatize the following info and break them into differeng key points. write them in yojr own words
apartus
6.1 Introduction—The design of a successful hot box appa- ratus is influenced by many factors. Before beginning the design of an apparatus meeting this standard, the designer shall review the discussion on the limitations and accuracy, Section 13, discussions of the energy flows in a hot box, Annex A2, the metering box wall loss flow, Annex A3, and flanking loss, Annex...
ART II. Case studies (10 points) -Name the genus and species of each of these. 1. A 15-year-old high school student who had no prior known renal disease developed a sore throat and 103 Ffever. The fever and sore throat lasted for three days. Ten days later, he developed hematuria, puffy eyelids, and swollen ankles. He went to a physician, who noted an inflamed pharynx, enlarged and reddened tonsils, and palpable cervical lymph nodes. The patient had pitting edema of...
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