Homework Answers
Add Answer to:
A heavy-duty electrical resistor is 2cm in diameter by 16cm long. 5 amps of current through...
Inside the chamber is a horizontal long resistor wire having a diameter of 2.5 mm. The...
Inside the chamber is a horizontal long resistor wire having a diameter of 2.5 mm. The chamber the internal surfaces have a constant temperature of 280 K and the temperature of the air inside the chamber is 300 K. The emissivity of the outer surface of the resistor is ε = 0.3 and the specific resistance R '= 2.162 Ω/ m. The resistance the maximum surface temperature must not exceed 1500 K. Calculate the current flowing through the resistor maximum...
Inside the chamber is a horizontal long resistor wire having a diameter of 2.5 mm. The...
Inside the chamber is a horizontal long resistor wire having a diameter of 2.5 mm. The chamber the internal surfaces have a constant temperature of 280 K and the temperature of the air inside the chamber is 300 K. The emissivity of the outer surface of the resistor is ε = 0.3 and the specific resistance R '= 2.162 Ω/ m. The resistance the maximum surface temperature must not exceed 1500 K. Calculate the current flowing through the resistor maximum...
This is for static air don't just copy from others', this is a different problem. 1. A very long horizontal cylinder of Unobtainium, of diameter 100 mm, is initially at a uniform temperature...
This is for static air don't just copy from others', this is a
different problem.
1. A very long horizontal cylinder of Unobtainium, of diameter 100 mm, is initially at a uniform temperature of 500 K. The cylinder is left to cool in a large room of static air at 300 K. Calculate a) the average convective heat transfer coefficient at the beginning of the cooling process when the initial temperature of the cylinder is 500 K, and 10] 15]...
Two metal plates are being joined through the use of a weld rod. The electric current,...
Two metal plates are being joined through the use of a weld rod. The electric current, L, through the weld rod, causes thermal energy generation along the length of the weld rod. At the same tin the weld rod due to the hotness of the weld zone and convected into the surrounding ambient across the eylindrical surface of the rod. Formulate a differential equation which governs the temperature profile in the weld rod. Assume steady state. You do not need...
Problem 2. A long thin alloy wire with a diameter of 0.2 mm is exposed to...
Problem 2. A long thin alloy wire with a diameter of 0.2 mm is exposed to ambient air at T, -25°C with a combined heat transfer coefficient h-10 W/m2.K (due to natural convection and radiation). An electric current10.15 A flows through the wire. The electrical resistance of the wire per unit length is R-162/m. (a) Draw a control volume to write down the energy balance equation. (b) Determine the steady-state temperature of the alloy wire, assuming that the solid wire...
A bare copper cable 2.5 cm in diameter is situated in still air at 15°C. A...
A bare copper cable 2.5 cm in diameter is situated in still air at 15°C. A current of 800 Amps is passed along the cable. Heat is transferred from the cable to its surroundings by natural convection for which the heat transfer coefficient may be expressed as 2.95025 W/m2 K. Determine whether or not it may be assumed that the temperature across the copper cross section is uniform and what the equilibrium temperature of the cable surface will be. If...
ice-water bath at o°C. There exist electrical resistance a heat power of 5 MW/m3 in the...
ice-water bath at o°C. There exist electrical resistance a heat power of 5 MW/m3 in the that Transfer @ Wais at 55C with a by 2cm square 100°C flow rate of 0.01 1g/s exters a duct in cross-section whose walls are maintained at a uniform temperature byeko dynamically developer flow. Determined the duct legfel required to heat the water to 70°C. ③ A two centimeter in diameter rood with a length of to an is grinded by grinder. During grinding,...
Steam in a heating system flows through a 1-m long tube whose outer diameter is DI...
Steam in a heating system flows through a 1-m long tube whose outer diameter is DI = 4 cm and whose walls are maintained at a temperature of T, = 120 °C. Circular fins (k = 46 W/m. °C) of outer diameter D2 = 8 cm and constant thickness t= 3 mm are attached to the tube, as shown in the figure. The space between the fins is 7 mm. Heat is transferred to the surrounding air at T =...
5. Problem 3.54 (Textbook) (20 points) KNOWN: Diameter of electrical wire. Thickness and thermal conductivity of...
5. Problem 3.54 (Textbook) (20 points) KNOWN: Diameter of electrical wire. Thickness and thermal conductivity of rubberized sheath. Contact resistance between sheath and wire. Convection coefficient and ambient air temperature. Maximum allowable sheath temperature. FIND: Maximum allowable power dissipation per unit length of wire. Critical radius of insulation. SCHEMATIC: Air Wire Egen. D-2 mm Two Tini Tino To Ric = 3x10-4 m2-KW Insulation, t = 2 mm T= 20°C Ric Rcond conv k = 0.13 W/m-K Tmax = 50°C h...
Design Problem Design a small chiller room 2.35 m wide by 6 m long and 2.38...
Design Problem Design a small chiller room 2.35 m wide by 6 m long and 2.38 m high that is to be used to chill and store a food product. The chiller is to be loaded with 60 buckets of the food product at 23 °C which needs to be cooled down to 3 °C within 24 hours using air at 1 °C, with a heat transfer coefficient of 36 W m2 K Tasks 1. Calculate the peak refrigeration loading...
This is for static air don't just copy from others', this is a
different problem.
1. A very long horizontal cylinder of Unobtainium, of diameter 100 mm, is initially at a uniform temperature of 500 K. The cylinder is left to cool in a large room of static air at 300 K. Calculate a) the average convective heat transfer coefficient at the beginning of the cooling process when the initial temperature of the cylinder is 500 K, and 10] 15]...
Two metal plates are being joined through the use of a weld rod. The electric current, L, through the weld rod, causes thermal energy generation along the length of the weld rod. At the same tin the weld rod due to the hotness of the weld zone and convected into the surrounding ambient across the eylindrical surface of the rod. Formulate a differential equation which governs the temperature profile in the weld rod. Assume steady state. You do not need...
Problem 2. A long thin alloy wire with a diameter of 0.2 mm is exposed to ambient air at T, -25°C with a combined heat transfer coefficient h-10 W/m2.K (due to natural convection and radiation). An electric current10.15 A flows through the wire. The electrical resistance of the wire per unit length is R-162/m. (a) Draw a control volume to write down the energy balance equation. (b) Determine the steady-state temperature of the alloy wire, assuming that the solid wire...
A bare copper cable 2.5 cm in diameter is situated in still air at 15°C. A current of 800 Amps is passed along the cable. Heat is transferred from the cable to its surroundings by natural convection for which the heat transfer coefficient may be expressed as 2.95025 W/m2 K. Determine whether or not it may be assumed that the temperature across the copper cross section is uniform and what the equilibrium temperature of the cable surface will be. If...
ice-water bath at o°C. There exist electrical resistance a heat power of 5 MW/m3 in the that Transfer @ Wais at 55C with a by 2cm square 100°C flow rate of 0.01 1g/s exters a duct in cross-section whose walls are maintained at a uniform temperature byeko dynamically developer flow. Determined the duct legfel required to heat the water to 70°C. ③ A two centimeter in diameter rood with a length of to an is grinded by grinder. During grinding,...
5. Problem 3.54 (Textbook) (20 points) KNOWN: Diameter of electrical wire. Thickness and thermal conductivity of rubberized sheath. Contact resistance between sheath and wire. Convection coefficient and ambient air temperature. Maximum allowable sheath temperature. FIND: Maximum allowable power dissipation per unit length of wire. Critical radius of insulation. SCHEMATIC: Air Wire Egen. D-2 mm Two Tini Tino To Ric = 3x10-4 m2-KW Insulation, t = 2 mm T= 20°C Ric Rcond conv k = 0.13 W/m-K Tmax = 50°C h...
Design Problem Design a small chiller room 2.35 m wide by 6 m long and 2.38 m high that is to be used to chill and store a food product. The chiller is to be loaded with 60 buckets of the food product at 23 °C which needs to be cooled down to 3 °C within 24 hours using air at 1 °C, with a heat transfer coefficient of 36 W m2 K Tasks 1. Calculate the peak refrigeration loading...
Most questions answered within 3 hours.
-
Convert your enthalpy of reaction (kJ/mol) to heat of explosion
(kJ/kg) using the molar mass of...
asked 2 minutes ago -
At what annual rate would the following have to be
invested?
$8,929, to grow to $55,581,...
asked 1 minute ago -
If the codon were 5 bases long instead of three, how many codons
would exist in...
asked 8 minutes ago -
Mittuch Corp. is evaluating a project with the following cash
flows. The company uses a discount...
asked 15 minutes ago -
An income elasticity coefficient of −1.8 means the product is a
normal good.
true or false
asked 7 minutes ago -
PLEASE ANSWER ASAP ASIAN AMERICAN HISTORY
Considering the number of migrants and the time period in...
asked 15 minutes ago -
When finding confidence interval for mu , if population standard
deviation (sigma) is known, we use...
asked 16 minutes ago -
1. If a good has a price elasticity of demand equal to
0, ________.
a) the...
asked 18 minutes ago -
1. Research through the literature give other ways of converting
methyl benzenes to benzoic acids, draw...
asked 20 minutes ago -
a) A car has a fuel economy of 25 miles per gallon. Calculate
this value in...
asked 30 minutes ago -
Q1- say a letter in a word is missing, can you find the missing
letter? For...
asked 38 minutes ago -
What is the temperature of 100.0 grams of chlorine gas in a
55.0-L container at 800....
asked 52 minutes ago