Made of steel (ρ = 7920 kg / m3 cp = 580 J / kg °...

Made of steel (ρ = 7920 kg / m3 cp = 580 J / kg ° K, k = 52 W / mK) with a diameter of 70 mm and a length of 8000 mm The rod is first kept in a room with an ambient temperature of uniform 40 ° C. Rod then film coefficient It enters its oven of 373 W / m2K at 900 ° C. After 2273 seconds, a.) Find the center axis temperature of the rod? b.) How much heat is passed into the bar during this time?

Expert Solution

The given problem can be solved by transient heat transfer approach. The solution has been attached below.

samet mamat answered 6 months ago

A stainless steel ball (? = 8055 kg/m3 , CP = 480 J/Kg? K ) of...

A stainless steel ball (? = 8055 kg/m3 , CP = 480 J/Kg? K ) of diameter D = 15cm is removed from the oven at a uniform temperature of 350 Degrees C. The ball is then subjected to the flow of air at 1 atm pressure and 30 degrees C with a velocity of 6m/s. The surface temperature of the ball eventually drops to 250 degrees 250 degrees C. Determine the average convection heat transfer coefficient during this cooling...

A thick steel slab (ρ= 7800 kg/m3, c= 480 J/kg·K, k= 50 W/m·K) is initially at...

A thick steel slab (ρ= 7800 kg/m3, c= 480 J/kg·K, k= 50 W/m·K) is initially at 300°C and is cooled by water jets impinging on one of its surfaces. The temperature of the water is 25°C, and the jets maintain an extremely large, approximately uniform convection coefficient at the surface. Assuming that the surface is maintained at the temperature of the water throughout the cooling, how long will it take for the temperature to reach 50°C at a distance of...

Water ( ρ= 1000 kg/m3; Cp= 4.2 kJ/kg.K; k= 0.58 W/m.K ) at 1,537 kg/hr and...

Water ( ρ= 1000 kg/m3; Cp= 4.2 kJ/kg.K; k= 0.58 W/m.K ) at 1,537 kg/hr and 26oC enters a 10-mm-diameter smooth tube whose wall temperature is maintained at 79oC. If the water's Nusselt number (Nu) = 375, and the tube length is 7.6, calculate the water outlet temperature,in oC.

FIreclay brick (ρ=2050 kg/m3, cp=960 J/kg-K, k=1.1 W/m-K) with dimensions 0.06 m x 0.09 m x...

FIreclay brick (ρ=2050 kg/m3, cp=960 J/kg-K, k=1.1 W/m-K) with dimensions 0.06 m x 0.09 m x 0.20 m is removed from a kiln at 1600K and cooled in air at 40C with h = 30 W/m2-K. What is the temperature at the corner of the brick after 50 minutes of cooling? Give your answer in degrees C.

Water ( ρ= 1000 kg/m3; Cp= 4.2 kJ/kg.K) at 1,488 kg/hr and 13oC enters a 10-mm-diameter...

Water ( ρ= 1000 kg/m3; Cp= 4.2 kJ/kg.K) at 1,488 kg/hr and 13oC enters a 10-mm-diameter smooth tube whose wall temperature is maintained at 56oC. If the convection heat transfer coefficient is 11,496 W/m2.K, calculate the tube length, in m, necessary to heat the water to 40oC.

Assume the density of air is ρ = 1.21 kg/m3. A 75-kg skydiver descending head first...

Assume the density of air is ρ = 1.21 kg/m3. A 75-kg skydiver descending head first without parachute will have an area approximately A = 0.18 m2 and a drag coefficient of approximately C=0.70. (a) What would be the predicted terminal velocity of this person if falling from very high altitude (high enough to generate terminal velocity). (b) how many meters above the ground the airplane must fly in order for this person to generate that terminal velocity at the...

3. We wish to determine the thermal conductivity of an apple (= 950 kg/m3, Cp =...

3. We wish to determine the thermal conductivity of an apple (= 950 kg/m3, Cp = 3200 J/kg K), which can be considered to be a sphere of radius R = 4 cm. To do this, we design an experiment in which a thermocouple is placed at the center of the apple. A rubber sphere of known properties (= 980 kg/m3, Cp = 1910 J/kg K, k = 0.17 W/m K) and the same radius (4 cm) is also provided...

Uncertainty calculation  I want to determine the air density (ρ, in kg/m3) using the following...

Uncertainty calculation  I want to determine the air density (ρ, in kg/m3) using the following equation. p=(1/R)*(P/T) where P : barometric pressure, in Pa T: temperature, in K R: specific gas constant for dry air, 289.7 J/(kg·K) [assume constant has no uncertainty]  I performed a sample-to-sample experiment with 6 repetitions/samples (n = 6). I got following results: P = 96,389 ± 167 Pa T = 311.8 ± 2.93 K  The tags on the sensors show the barometric...

3.1. Oil with (ρ = 788 kg/m3 and ν=0.00067 m2 is removed to the atmosphere through...

3.1. Oil with (ρ = 788 kg/m3 and ν=0.00067 m2 is removed to the atmosphere through a pipe, 7mm diameter, and 37m long. The pipe is located 3.5m from the top of the oil. If the pipe is build using smooth stainless steel, find the flow rate of the oil and the condition of the flow. 3.2. A water tank is located at the top of the roof with 20°C of water that will be used for showers. The tank...

Water (cp=4179 J/kg·K) at 30 °C flows on the inside of a steel tube with 25...

Water (cp=4179 J/kg·K) at 30 °C flows on the inside of a steel tube with 25 mm inner diameter and 0.4 mm wall thickness at a flow rate of 0.4 kg/s. The tubes forms inside of a counter flow double pipe heat exchanger. Engine oil at 100 °C flows in the annular space with a flowrate of 0.1 kg/s. The outlet temperature of the oil is 60 °C. The material of the heat exchanger is carbon steel with k=45 W/m·K....

Question